Composição corporal e exigências líquidas e dietéticas de macroelementos minerais de bovinos F1 Limousin x Nelore não-castrados Body composition and net and dietary macrominerals requirements of F1 Limousin x Nellore bulls

Foram utilizados 50 novilhos F1 Limousin x Nelore inteiros, alocados em dez tratamentos, com cinco níveis de concentrado (25; 37,5; 50; 62,5; e 75%) e duas formas de balanceamento protéico da dieta (uma isoprotéica com 12% de proteína bruta [PB] e outra variando proteína com energia). O volumoso utilizado foi feno de capim-Coastcross (Cynodon dactylon). Após o abate, todas as partes do corpo do animal foram pesadas e amostradas. As amostras foram secas, pré-desengorduradas com éter, moídas e foram determinados os teores de macroelementos minerais. O conteúdo corporal de Ca, P, Na, K e Mg foi determinado em função das concentrações destes nas várias partes do corpo. O conteúdo de macroelementos minerais retidos no corpo foi estimado por meio de equações de regressão do logaritmo do conteúdo corporal dos macroelementos minerais em função do logaritmo do peso de corpo vazio (PCVZ). As exigências líquidas dos macroelementos minerais, para ganho de 1 kg de PCVZ, foram obtidas utilizando a equação Y' = b. 10ª. Xb-1, sendo a e b o intercepto e o coeficiente de regressão, respectivamente, das equações de predição dos conteúdos corporais dos macroelementos minerais. Houve diminuição nas concentrações dos cinco macroelementos estudados no corpo vazio e no ganho de corpo vazio, com a elevação do peso vivo. As relações g Ca/100 g de proteína retida e g P/100 g de proteína retida foram iguais a 8,70 e 3,46, respectivamente.<br<Fifty F1 Limousin x Nellore bulls were allotted to ten treatments, with five concentrate levels (25; 37.5; 50; 62.5 e 75%) and two diet protein balance methods (one isoprotein and the other changing protein as diet energy changed). The roughage used was Coastcross grass hay (Cynodon dactylon). After the slaughter, all animal body parts were weighted and sampled. The samples were dried, most of the fat was extracted with ether, grinded, and the concentrations of macrominerals were determined. Ca, P, Na, K and Mg contents in the body were determined as function of their concentrations in the several parts of the body. Macrominerals contents retained in the body were determined by regression equations of the logarithm of macrominerals contents in the body as function of the logarithm of empty body weight (EBW). By deriving the prediction equations of macrominerals body content as function of the logarithm of EBW, it was obtained the net macrominerals requirements, for gains of 1 kg EBW, through the equation Y' = b. 10ª. Xb-1, being "a" and "b" intercept and the regression coefficient, respectively, of the prediction equations of macrominerals contents in the body. There was a decrease in the empty body and in the gain of empty body concentrations for all macrominerals studied, with live weight increase. The relationship g Ca/100 g of retained protein and g P/100 g of retained protein were 8.70 and 3.46, respectively. Ausführliche Beschreibung

Gespeichert in:

Autor*in:	Cristina Mattos Veloso [verfasserIn] Sebastião de Campos Valadares Filho [verfasserIn] Antonio Gesuladi Júnior [verfasserIn] Fabiano Ferreira da Silva [verfasserIn] Mário Fonseca Paulino [verfasserIn] Rilene Ferreira Diniz Valadares [verfasserIn] Paulo Roberto Cecon [verfasserIn] Gisele Andrade de Oliveira [verfasserIn] Aureliano José Vieira Pires [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch ; Spanisch ; Portugiesisch

Erschienen:	2002

Schlagwörter:	macrominerais mestiços níveis de concentrado requisitos concentrate levels crossbred macrominerals needs

Übergeordnetes Werk:	In: Revista Brasileira de Zootecnia - Sociedade Brasileira de Zootecnia, 2004, 31(2002), 3, Seite 1294-1301
Übergeordnetes Werk:	volume:31 ; year:2002 ; number:3 ; pages:1294-1301

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc Journal toc

DOI / URN:	10.1590/S1516-35982002000500028

Katalog-ID:	DOAJ072440465

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245	1	0	\|a Composição corporal e exigências líquidas e dietéticas de macroelementos minerais de bovinos F1 Limousin x Nelore não-castrados Body composition and net and dietary macrominerals requirements of F1 Limousin x Nellore bulls
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520			\|a Foram utilizados 50 novilhos F1 Limousin x Nelore inteiros, alocados em dez tratamentos, com cinco níveis de concentrado (25; 37,5; 50; 62,5; e 75%) e duas formas de balanceamento protéico da dieta (uma isoprotéica com 12% de proteína bruta [PB] e outra variando proteína com energia). O volumoso utilizado foi feno de capim-Coastcross (Cynodon dactylon). Após o abate, todas as partes do corpo do animal foram pesadas e amostradas. As amostras foram secas, pré-desengorduradas com éter, moídas e foram determinados os teores de macroelementos minerais. O conteúdo corporal de Ca, P, Na, K e Mg foi determinado em função das concentrações destes nas várias partes do corpo. O conteúdo de macroelementos minerais retidos no corpo foi estimado por meio de equações de regressão do logaritmo do conteúdo corporal dos macroelementos minerais em função do logaritmo do peso de corpo vazio (PCVZ). As exigências líquidas dos macroelementos minerais, para ganho de 1 kg de PCVZ, foram obtidas utilizando a equação Y' = b. 10ª. Xb-1, sendo a e b o intercepto e o coeficiente de regressão, respectivamente, das equações de predição dos conteúdos corporais dos macroelementos minerais. Houve diminuição nas concentrações dos cinco macroelementos estudados no corpo vazio e no ganho de corpo vazio, com a elevação do peso vivo. As relações g Ca/100 g de proteína retida e g P/100 g de proteína retida foram iguais a 8,70 e 3,46, respectivamente.<br<Fifty F1 Limousin x Nellore bulls were allotted to ten treatments, with five concentrate levels (25; 37.5; 50; 62.5 e 75%) and two diet protein balance methods (one isoprotein and the other changing protein as diet energy changed). The roughage used was Coastcross grass hay (Cynodon dactylon). After the slaughter, all animal body parts were weighted and sampled. The samples were dried, most of the fat was extracted with ether, grinded, and the concentrations of macrominerals were determined. Ca, P, Na, K and Mg contents in the body were determined as function of their concentrations in the several parts of the body. Macrominerals contents retained in the body were determined by regression equations of the logarithm of macrominerals contents in the body as function of the logarithm of empty body weight (EBW). By deriving the prediction equations of macrominerals body content as function of the logarithm of EBW, it was obtained the net macrominerals requirements, for gains of 1 kg EBW, through the equation Y' = b. 10ª. Xb-1, being "a" and "b" intercept and the regression coefficient, respectively, of the prediction equations of macrominerals contents in the body. There was a decrease in the empty body and in the gain of empty body concentrations for all macrominerals studied, with live weight increase. The relationship g Ca/100 g of retained protein and g P/100 g of retained protein were 8.70 and 3.46, respectively.
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700	0		\|a Paulo Roberto Cecon \|e verfasserin \|4 aut
700	0		\|a Gisele Andrade de Oliveira \|e verfasserin \|4 aut
700	0		\|a Aureliano José Vieira Pires \|e verfasserin \|4 aut
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allfields	10.1590/S1516-35982002000500028 doi (DE-627)DOAJ072440465 (DE-599)DOAJ30638821d68946c4b4d8a6644ee06955 DE-627 ger DE-627 rakwb eng spa por SF1-1100 Cristina Mattos Veloso verfasserin aut Composição corporal e exigências líquidas e dietéticas de macroelementos minerais de bovinos F1 Limousin x Nelore não-castrados Body composition and net and dietary macrominerals requirements of F1 Limousin x Nellore bulls 2002 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Foram utilizados 50 novilhos F1 Limousin x Nelore inteiros, alocados em dez tratamentos, com cinco níveis de concentrado (25; 37,5; 50; 62,5; e 75%) e duas formas de balanceamento protéico da dieta (uma isoprotéica com 12% de proteína bruta [PB] e outra variando proteína com energia). O volumoso utilizado foi feno de capim-Coastcross (Cynodon dactylon). Após o abate, todas as partes do corpo do animal foram pesadas e amostradas. As amostras foram secas, pré-desengorduradas com éter, moídas e foram determinados os teores de macroelementos minerais. O conteúdo corporal de Ca, P, Na, K e Mg foi determinado em função das concentrações destes nas várias partes do corpo. O conteúdo de macroelementos minerais retidos no corpo foi estimado por meio de equações de regressão do logaritmo do conteúdo corporal dos macroelementos minerais em função do logaritmo do peso de corpo vazio (PCVZ). As exigências líquidas dos macroelementos minerais, para ganho de 1 kg de PCVZ, foram obtidas utilizando a equação Y' = b. 10ª. Xb-1, sendo a e b o intercepto e o coeficiente de regressão, respectivamente, das equações de predição dos conteúdos corporais dos macroelementos minerais. Houve diminuição nas concentrações dos cinco macroelementos estudados no corpo vazio e no ganho de corpo vazio, com a elevação do peso vivo. As relações g Ca/100 g de proteína retida e g P/100 g de proteína retida foram iguais a 8,70 e 3,46, respectivamente.<br<Fifty F1 Limousin x Nellore bulls were allotted to ten treatments, with five concentrate levels (25; 37.5; 50; 62.5 e 75%) and two diet protein balance methods (one isoprotein and the other changing protein as diet energy changed). The roughage used was Coastcross grass hay (Cynodon dactylon). After the slaughter, all animal body parts were weighted and sampled. The samples were dried, most of the fat was extracted with ether, grinded, and the concentrations of macrominerals were determined. Ca, P, Na, K and Mg contents in the body were determined as function of their concentrations in the several parts of the body. Macrominerals contents retained in the body were determined by regression equations of the logarithm of macrominerals contents in the body as function of the logarithm of empty body weight (EBW). By deriving the prediction equations of macrominerals body content as function of the logarithm of EBW, it was obtained the net macrominerals requirements, for gains of 1 kg EBW, through the equation Y' = b. 10ª. Xb-1, being "a" and "b" intercept and the regression coefficient, respectively, of the prediction equations of macrominerals contents in the body. There was a decrease in the empty body and in the gain of empty body concentrations for all macrominerals studied, with live weight increase. The relationship g Ca/100 g of retained protein and g P/100 g of retained protein were 8.70 and 3.46, respectively. macrominerais mestiços níveis de concentrado requisitos concentrate levels crossbred macrominerals needs Animal culture Sebastião de Campos Valadares Filho verfasserin aut Antonio Gesuladi Júnior verfasserin aut Fabiano Ferreira da Silva verfasserin aut Mário Fonseca Paulino verfasserin aut Rilene Ferreira Diniz Valadares verfasserin aut Paulo Roberto Cecon verfasserin aut Gisele Andrade de Oliveira verfasserin aut Aureliano José Vieira Pires verfasserin aut In Revista Brasileira de Zootecnia Sociedade Brasileira de Zootecnia, 2004 31(2002), 3, Seite 1294-1301 (DE-627)347753302 (DE-600)2078814-9 18069290 nnns volume:31 year:2002 number:3 pages:1294-1301 https://doi.org/10.1590/S1516-35982002000500028 kostenfrei https://doaj.org/article/30638821d68946c4b4d8a6644ee06955 kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982002000500028 kostenfrei https://doaj.org/toc/1516-3598 Journal toc kostenfrei https://doaj.org/toc/1806-9290 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 31 2002 3 1294-1301
spelling	10.1590/S1516-35982002000500028 doi (DE-627)DOAJ072440465 (DE-599)DOAJ30638821d68946c4b4d8a6644ee06955 DE-627 ger DE-627 rakwb eng spa por SF1-1100 Cristina Mattos Veloso verfasserin aut Composição corporal e exigências líquidas e dietéticas de macroelementos minerais de bovinos F1 Limousin x Nelore não-castrados Body composition and net and dietary macrominerals requirements of F1 Limousin x Nellore bulls 2002 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Foram utilizados 50 novilhos F1 Limousin x Nelore inteiros, alocados em dez tratamentos, com cinco níveis de concentrado (25; 37,5; 50; 62,5; e 75%) e duas formas de balanceamento protéico da dieta (uma isoprotéica com 12% de proteína bruta [PB] e outra variando proteína com energia). O volumoso utilizado foi feno de capim-Coastcross (Cynodon dactylon). Após o abate, todas as partes do corpo do animal foram pesadas e amostradas. As amostras foram secas, pré-desengorduradas com éter, moídas e foram determinados os teores de macroelementos minerais. O conteúdo corporal de Ca, P, Na, K e Mg foi determinado em função das concentrações destes nas várias partes do corpo. O conteúdo de macroelementos minerais retidos no corpo foi estimado por meio de equações de regressão do logaritmo do conteúdo corporal dos macroelementos minerais em função do logaritmo do peso de corpo vazio (PCVZ). As exigências líquidas dos macroelementos minerais, para ganho de 1 kg de PCVZ, foram obtidas utilizando a equação Y' = b. 10ª. Xb-1, sendo a e b o intercepto e o coeficiente de regressão, respectivamente, das equações de predição dos conteúdos corporais dos macroelementos minerais. Houve diminuição nas concentrações dos cinco macroelementos estudados no corpo vazio e no ganho de corpo vazio, com a elevação do peso vivo. As relações g Ca/100 g de proteína retida e g P/100 g de proteína retida foram iguais a 8,70 e 3,46, respectivamente.<br<Fifty F1 Limousin x Nellore bulls were allotted to ten treatments, with five concentrate levels (25; 37.5; 50; 62.5 e 75%) and two diet protein balance methods (one isoprotein and the other changing protein as diet energy changed). The roughage used was Coastcross grass hay (Cynodon dactylon). After the slaughter, all animal body parts were weighted and sampled. The samples were dried, most of the fat was extracted with ether, grinded, and the concentrations of macrominerals were determined. Ca, P, Na, K and Mg contents in the body were determined as function of their concentrations in the several parts of the body. Macrominerals contents retained in the body were determined by regression equations of the logarithm of macrominerals contents in the body as function of the logarithm of empty body weight (EBW). By deriving the prediction equations of macrominerals body content as function of the logarithm of EBW, it was obtained the net macrominerals requirements, for gains of 1 kg EBW, through the equation Y' = b. 10ª. Xb-1, being "a" and "b" intercept and the regression coefficient, respectively, of the prediction equations of macrominerals contents in the body. There was a decrease in the empty body and in the gain of empty body concentrations for all macrominerals studied, with live weight increase. The relationship g Ca/100 g of retained protein and g P/100 g of retained protein were 8.70 and 3.46, respectively. macrominerais mestiços níveis de concentrado requisitos concentrate levels crossbred macrominerals needs Animal culture Sebastião de Campos Valadares Filho verfasserin aut Antonio Gesuladi Júnior verfasserin aut Fabiano Ferreira da Silva verfasserin aut Mário Fonseca Paulino verfasserin aut Rilene Ferreira Diniz Valadares verfasserin aut Paulo Roberto Cecon verfasserin aut Gisele Andrade de Oliveira verfasserin aut Aureliano José Vieira Pires verfasserin aut In Revista Brasileira de Zootecnia Sociedade Brasileira de Zootecnia, 2004 31(2002), 3, Seite 1294-1301 (DE-627)347753302 (DE-600)2078814-9 18069290 nnns volume:31 year:2002 number:3 pages:1294-1301 https://doi.org/10.1590/S1516-35982002000500028 kostenfrei https://doaj.org/article/30638821d68946c4b4d8a6644ee06955 kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982002000500028 kostenfrei https://doaj.org/toc/1516-3598 Journal toc kostenfrei https://doaj.org/toc/1806-9290 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 31 2002 3 1294-1301
allfields_unstemmed	10.1590/S1516-35982002000500028 doi (DE-627)DOAJ072440465 (DE-599)DOAJ30638821d68946c4b4d8a6644ee06955 DE-627 ger DE-627 rakwb eng spa por SF1-1100 Cristina Mattos Veloso verfasserin aut Composição corporal e exigências líquidas e dietéticas de macroelementos minerais de bovinos F1 Limousin x Nelore não-castrados Body composition and net and dietary macrominerals requirements of F1 Limousin x Nellore bulls 2002 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Foram utilizados 50 novilhos F1 Limousin x Nelore inteiros, alocados em dez tratamentos, com cinco níveis de concentrado (25; 37,5; 50; 62,5; e 75%) e duas formas de balanceamento protéico da dieta (uma isoprotéica com 12% de proteína bruta [PB] e outra variando proteína com energia). O volumoso utilizado foi feno de capim-Coastcross (Cynodon dactylon). Após o abate, todas as partes do corpo do animal foram pesadas e amostradas. As amostras foram secas, pré-desengorduradas com éter, moídas e foram determinados os teores de macroelementos minerais. O conteúdo corporal de Ca, P, Na, K e Mg foi determinado em função das concentrações destes nas várias partes do corpo. O conteúdo de macroelementos minerais retidos no corpo foi estimado por meio de equações de regressão do logaritmo do conteúdo corporal dos macroelementos minerais em função do logaritmo do peso de corpo vazio (PCVZ). As exigências líquidas dos macroelementos minerais, para ganho de 1 kg de PCVZ, foram obtidas utilizando a equação Y' = b. 10ª. Xb-1, sendo a e b o intercepto e o coeficiente de regressão, respectivamente, das equações de predição dos conteúdos corporais dos macroelementos minerais. Houve diminuição nas concentrações dos cinco macroelementos estudados no corpo vazio e no ganho de corpo vazio, com a elevação do peso vivo. As relações g Ca/100 g de proteína retida e g P/100 g de proteína retida foram iguais a 8,70 e 3,46, respectivamente.<br<Fifty F1 Limousin x Nellore bulls were allotted to ten treatments, with five concentrate levels (25; 37.5; 50; 62.5 e 75%) and two diet protein balance methods (one isoprotein and the other changing protein as diet energy changed). The roughage used was Coastcross grass hay (Cynodon dactylon). After the slaughter, all animal body parts were weighted and sampled. The samples were dried, most of the fat was extracted with ether, grinded, and the concentrations of macrominerals were determined. Ca, P, Na, K and Mg contents in the body were determined as function of their concentrations in the several parts of the body. Macrominerals contents retained in the body were determined by regression equations of the logarithm of macrominerals contents in the body as function of the logarithm of empty body weight (EBW). By deriving the prediction equations of macrominerals body content as function of the logarithm of EBW, it was obtained the net macrominerals requirements, for gains of 1 kg EBW, through the equation Y' = b. 10ª. Xb-1, being "a" and "b" intercept and the regression coefficient, respectively, of the prediction equations of macrominerals contents in the body. There was a decrease in the empty body and in the gain of empty body concentrations for all macrominerals studied, with live weight increase. The relationship g Ca/100 g of retained protein and g P/100 g of retained protein were 8.70 and 3.46, respectively. macrominerais mestiços níveis de concentrado requisitos concentrate levels crossbred macrominerals needs Animal culture Sebastião de Campos Valadares Filho verfasserin aut Antonio Gesuladi Júnior verfasserin aut Fabiano Ferreira da Silva verfasserin aut Mário Fonseca Paulino verfasserin aut Rilene Ferreira Diniz Valadares verfasserin aut Paulo Roberto Cecon verfasserin aut Gisele Andrade de Oliveira verfasserin aut Aureliano José Vieira Pires verfasserin aut In Revista Brasileira de Zootecnia Sociedade Brasileira de Zootecnia, 2004 31(2002), 3, Seite 1294-1301 (DE-627)347753302 (DE-600)2078814-9 18069290 nnns volume:31 year:2002 number:3 pages:1294-1301 https://doi.org/10.1590/S1516-35982002000500028 kostenfrei https://doaj.org/article/30638821d68946c4b4d8a6644ee06955 kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982002000500028 kostenfrei https://doaj.org/toc/1516-3598 Journal toc kostenfrei https://doaj.org/toc/1806-9290 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 31 2002 3 1294-1301
allfieldsGer	10.1590/S1516-35982002000500028 doi (DE-627)DOAJ072440465 (DE-599)DOAJ30638821d68946c4b4d8a6644ee06955 DE-627 ger DE-627 rakwb eng spa por SF1-1100 Cristina Mattos Veloso verfasserin aut Composição corporal e exigências líquidas e dietéticas de macroelementos minerais de bovinos F1 Limousin x Nelore não-castrados Body composition and net and dietary macrominerals requirements of F1 Limousin x Nellore bulls 2002 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Foram utilizados 50 novilhos F1 Limousin x Nelore inteiros, alocados em dez tratamentos, com cinco níveis de concentrado (25; 37,5; 50; 62,5; e 75%) e duas formas de balanceamento protéico da dieta (uma isoprotéica com 12% de proteína bruta [PB] e outra variando proteína com energia). O volumoso utilizado foi feno de capim-Coastcross (Cynodon dactylon). Após o abate, todas as partes do corpo do animal foram pesadas e amostradas. As amostras foram secas, pré-desengorduradas com éter, moídas e foram determinados os teores de macroelementos minerais. O conteúdo corporal de Ca, P, Na, K e Mg foi determinado em função das concentrações destes nas várias partes do corpo. O conteúdo de macroelementos minerais retidos no corpo foi estimado por meio de equações de regressão do logaritmo do conteúdo corporal dos macroelementos minerais em função do logaritmo do peso de corpo vazio (PCVZ). As exigências líquidas dos macroelementos minerais, para ganho de 1 kg de PCVZ, foram obtidas utilizando a equação Y' = b. 10ª. Xb-1, sendo a e b o intercepto e o coeficiente de regressão, respectivamente, das equações de predição dos conteúdos corporais dos macroelementos minerais. Houve diminuição nas concentrações dos cinco macroelementos estudados no corpo vazio e no ganho de corpo vazio, com a elevação do peso vivo. As relações g Ca/100 g de proteína retida e g P/100 g de proteína retida foram iguais a 8,70 e 3,46, respectivamente.<br<Fifty F1 Limousin x Nellore bulls were allotted to ten treatments, with five concentrate levels (25; 37.5; 50; 62.5 e 75%) and two diet protein balance methods (one isoprotein and the other changing protein as diet energy changed). The roughage used was Coastcross grass hay (Cynodon dactylon). After the slaughter, all animal body parts were weighted and sampled. The samples were dried, most of the fat was extracted with ether, grinded, and the concentrations of macrominerals were determined. Ca, P, Na, K and Mg contents in the body were determined as function of their concentrations in the several parts of the body. Macrominerals contents retained in the body were determined by regression equations of the logarithm of macrominerals contents in the body as function of the logarithm of empty body weight (EBW). By deriving the prediction equations of macrominerals body content as function of the logarithm of EBW, it was obtained the net macrominerals requirements, for gains of 1 kg EBW, through the equation Y' = b. 10ª. Xb-1, being "a" and "b" intercept and the regression coefficient, respectively, of the prediction equations of macrominerals contents in the body. There was a decrease in the empty body and in the gain of empty body concentrations for all macrominerals studied, with live weight increase. The relationship g Ca/100 g of retained protein and g P/100 g of retained protein were 8.70 and 3.46, respectively. macrominerais mestiços níveis de concentrado requisitos concentrate levels crossbred macrominerals needs Animal culture Sebastião de Campos Valadares Filho verfasserin aut Antonio Gesuladi Júnior verfasserin aut Fabiano Ferreira da Silva verfasserin aut Mário Fonseca Paulino verfasserin aut Rilene Ferreira Diniz Valadares verfasserin aut Paulo Roberto Cecon verfasserin aut Gisele Andrade de Oliveira verfasserin aut Aureliano José Vieira Pires verfasserin aut In Revista Brasileira de Zootecnia Sociedade Brasileira de Zootecnia, 2004 31(2002), 3, Seite 1294-1301 (DE-627)347753302 (DE-600)2078814-9 18069290 nnns volume:31 year:2002 number:3 pages:1294-1301 https://doi.org/10.1590/S1516-35982002000500028 kostenfrei https://doaj.org/article/30638821d68946c4b4d8a6644ee06955 kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982002000500028 kostenfrei https://doaj.org/toc/1516-3598 Journal toc kostenfrei https://doaj.org/toc/1806-9290 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 31 2002 3 1294-1301
allfieldsSound	10.1590/S1516-35982002000500028 doi (DE-627)DOAJ072440465 (DE-599)DOAJ30638821d68946c4b4d8a6644ee06955 DE-627 ger DE-627 rakwb eng spa por SF1-1100 Cristina Mattos Veloso verfasserin aut Composição corporal e exigências líquidas e dietéticas de macroelementos minerais de bovinos F1 Limousin x Nelore não-castrados Body composition and net and dietary macrominerals requirements of F1 Limousin x Nellore bulls 2002 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Foram utilizados 50 novilhos F1 Limousin x Nelore inteiros, alocados em dez tratamentos, com cinco níveis de concentrado (25; 37,5; 50; 62,5; e 75%) e duas formas de balanceamento protéico da dieta (uma isoprotéica com 12% de proteína bruta [PB] e outra variando proteína com energia). O volumoso utilizado foi feno de capim-Coastcross (Cynodon dactylon). Após o abate, todas as partes do corpo do animal foram pesadas e amostradas. As amostras foram secas, pré-desengorduradas com éter, moídas e foram determinados os teores de macroelementos minerais. O conteúdo corporal de Ca, P, Na, K e Mg foi determinado em função das concentrações destes nas várias partes do corpo. O conteúdo de macroelementos minerais retidos no corpo foi estimado por meio de equações de regressão do logaritmo do conteúdo corporal dos macroelementos minerais em função do logaritmo do peso de corpo vazio (PCVZ). As exigências líquidas dos macroelementos minerais, para ganho de 1 kg de PCVZ, foram obtidas utilizando a equação Y' = b. 10ª. Xb-1, sendo a e b o intercepto e o coeficiente de regressão, respectivamente, das equações de predição dos conteúdos corporais dos macroelementos minerais. Houve diminuição nas concentrações dos cinco macroelementos estudados no corpo vazio e no ganho de corpo vazio, com a elevação do peso vivo. As relações g Ca/100 g de proteína retida e g P/100 g de proteína retida foram iguais a 8,70 e 3,46, respectivamente.<br<Fifty F1 Limousin x Nellore bulls were allotted to ten treatments, with five concentrate levels (25; 37.5; 50; 62.5 e 75%) and two diet protein balance methods (one isoprotein and the other changing protein as diet energy changed). The roughage used was Coastcross grass hay (Cynodon dactylon). After the slaughter, all animal body parts were weighted and sampled. The samples were dried, most of the fat was extracted with ether, grinded, and the concentrations of macrominerals were determined. Ca, P, Na, K and Mg contents in the body were determined as function of their concentrations in the several parts of the body. Macrominerals contents retained in the body were determined by regression equations of the logarithm of macrominerals contents in the body as function of the logarithm of empty body weight (EBW). By deriving the prediction equations of macrominerals body content as function of the logarithm of EBW, it was obtained the net macrominerals requirements, for gains of 1 kg EBW, through the equation Y' = b. 10ª. Xb-1, being "a" and "b" intercept and the regression coefficient, respectively, of the prediction equations of macrominerals contents in the body. There was a decrease in the empty body and in the gain of empty body concentrations for all macrominerals studied, with live weight increase. The relationship g Ca/100 g of retained protein and g P/100 g of retained protein were 8.70 and 3.46, respectively. macrominerais mestiços níveis de concentrado requisitos concentrate levels crossbred macrominerals needs Animal culture Sebastião de Campos Valadares Filho verfasserin aut Antonio Gesuladi Júnior verfasserin aut Fabiano Ferreira da Silva verfasserin aut Mário Fonseca Paulino verfasserin aut Rilene Ferreira Diniz Valadares verfasserin aut Paulo Roberto Cecon verfasserin aut Gisele Andrade de Oliveira verfasserin aut Aureliano José Vieira Pires verfasserin aut In Revista Brasileira de Zootecnia Sociedade Brasileira de Zootecnia, 2004 31(2002), 3, Seite 1294-1301 (DE-627)347753302 (DE-600)2078814-9 18069290 nnns volume:31 year:2002 number:3 pages:1294-1301 https://doi.org/10.1590/S1516-35982002000500028 kostenfrei https://doaj.org/article/30638821d68946c4b4d8a6644ee06955 kostenfrei http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982002000500028 kostenfrei https://doaj.org/toc/1516-3598 Journal toc kostenfrei https://doaj.org/toc/1806-9290 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 31 2002 3 1294-1301
language	English Spanish Portuguese
source	In Revista Brasileira de Zootecnia 31(2002), 3, Seite 1294-1301 volume:31 year:2002 number:3 pages:1294-1301
sourceStr	In Revista Brasileira de Zootecnia 31(2002), 3, Seite 1294-1301 volume:31 year:2002 number:3 pages:1294-1301
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	macrominerais mestiços níveis de concentrado requisitos concentrate levels crossbred macrominerals needs Animal culture
isfreeaccess_bool	true
container_title	Revista Brasileira de Zootecnia
authorswithroles_txt_mv	Cristina Mattos Veloso @@aut@@ Sebastião de Campos Valadares Filho @@aut@@ Antonio Gesuladi Júnior @@aut@@ Fabiano Ferreira da Silva @@aut@@ Mário Fonseca Paulino @@aut@@ Rilene Ferreira Diniz Valadares @@aut@@ Paulo Roberto Cecon @@aut@@ Gisele Andrade de Oliveira @@aut@@ Aureliano José Vieira Pires @@aut@@
publishDateDaySort_date	2002-01-01T00:00:00Z
hierarchy_top_id	347753302
id	DOAJ072440465
language_de	englisch spanisch portugiesisch
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O volumoso utilizado foi feno de capim-Coastcross (Cynodon dactylon). Após o abate, todas as partes do corpo do animal foram pesadas e amostradas. As amostras foram secas, pré-desengorduradas com éter, moídas e foram determinados os teores de macroelementos minerais. O conteúdo corporal de Ca, P, Na, K e Mg foi determinado em função das concentrações destes nas várias partes do corpo. O conteúdo de macroelementos minerais retidos no corpo foi estimado por meio de equações de regressão do logaritmo do conteúdo corporal dos macroelementos minerais em função do logaritmo do peso de corpo vazio (PCVZ). As exigências líquidas dos macroelementos minerais, para ganho de 1 kg de PCVZ, foram obtidas utilizando a equação Y' = b. 10ª. Xb-1, sendo a e b o intercepto e o coeficiente de regressão, respectivamente, das equações de predição dos conteúdos corporais dos macroelementos minerais. Houve diminuição nas concentrações dos cinco macroelementos estudados no corpo vazio e no ganho de corpo vazio, com a elevação do peso vivo. As relações g Ca/100 g de proteína retida e g P/100 g de proteína retida foram iguais a 8,70 e 3,46, respectivamente.<br<Fifty F1 Limousin x Nellore bulls were allotted to ten treatments, with five concentrate levels (25; 37.5; 50; 62.5 e 75%) and two diet protein balance methods (one isoprotein and the other changing protein as diet energy changed). The roughage used was Coastcross grass hay (Cynodon dactylon). After the slaughter, all animal body parts were weighted and sampled. The samples were dried, most of the fat was extracted with ether, grinded, and the concentrations of macrominerals were determined. Ca, P, Na, K and Mg contents in the body were determined as function of their concentrations in the several parts of the body. Macrominerals contents retained in the body were determined by regression equations of the logarithm of macrominerals contents in the body as function of the logarithm of empty body weight (EBW). By deriving the prediction equations of macrominerals body content as function of the logarithm of EBW, it was obtained the net macrominerals requirements, for gains of 1 kg EBW, through the equation Y' = b. 10ª. Xb-1, being "a" and "b" intercept and the regression coefficient, respectively, of the prediction equations of macrominerals contents in the body. There was a decrease in the empty body and in the gain of empty body concentrations for all macrominerals studied, with live weight increase. 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callnumber-first	S - Agriculture
author	Cristina Mattos Veloso
spellingShingle	Cristina Mattos Veloso misc SF1-1100 misc macrominerais misc mestiços misc níveis de concentrado misc requisitos misc concentrate levels misc crossbred misc macrominerals misc needs misc Animal culture Composição corporal e exigências líquidas e dietéticas de macroelementos minerais de bovinos F1 Limousin x Nelore não-castrados Body composition and net and dietary macrominerals requirements of F1 Limousin x Nellore bulls
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topic_title	SF1-1100 Composição corporal e exigências líquidas e dietéticas de macroelementos minerais de bovinos F1 Limousin x Nelore não-castrados Body composition and net and dietary macrominerals requirements of F1 Limousin x Nellore bulls macrominerais mestiços níveis de concentrado requisitos concentrate levels crossbred macrominerals needs
topic	misc SF1-1100 misc macrominerais misc mestiços misc níveis de concentrado misc requisitos misc concentrate levels misc crossbred misc macrominerals misc needs misc Animal culture
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title	Composição corporal e exigências líquidas e dietéticas de macroelementos minerais de bovinos F1 Limousin x Nelore não-castrados Body composition and net and dietary macrominerals requirements of F1 Limousin x Nellore bulls
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title_full	Composição corporal e exigências líquidas e dietéticas de macroelementos minerais de bovinos F1 Limousin x Nelore não-castrados Body composition and net and dietary macrominerals requirements of F1 Limousin x Nellore bulls
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author_browse	Cristina Mattos Veloso Sebastião de Campos Valadares Filho Antonio Gesuladi Júnior Fabiano Ferreira da Silva Mário Fonseca Paulino Rilene Ferreira Diniz Valadares Paulo Roberto Cecon Gisele Andrade de Oliveira Aureliano José Vieira Pires
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title_sort	composição corporal e exigências líquidas e dietéticas de macroelementos minerais de bovinos f1 limousin x nelore não-castrados body composition and net and dietary macrominerals requirements of f1 limousin x nellore bulls
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title_auth	Composição corporal e exigências líquidas e dietéticas de macroelementos minerais de bovinos F1 Limousin x Nelore não-castrados Body composition and net and dietary macrominerals requirements of F1 Limousin x Nellore bulls
abstract	Foram utilizados 50 novilhos F1 Limousin x Nelore inteiros, alocados em dez tratamentos, com cinco níveis de concentrado (25; 37,5; 50; 62,5; e 75%) e duas formas de balanceamento protéico da dieta (uma isoprotéica com 12% de proteína bruta [PB] e outra variando proteína com energia). O volumoso utilizado foi feno de capim-Coastcross (Cynodon dactylon). Após o abate, todas as partes do corpo do animal foram pesadas e amostradas. As amostras foram secas, pré-desengorduradas com éter, moídas e foram determinados os teores de macroelementos minerais. O conteúdo corporal de Ca, P, Na, K e Mg foi determinado em função das concentrações destes nas várias partes do corpo. O conteúdo de macroelementos minerais retidos no corpo foi estimado por meio de equações de regressão do logaritmo do conteúdo corporal dos macroelementos minerais em função do logaritmo do peso de corpo vazio (PCVZ). As exigências líquidas dos macroelementos minerais, para ganho de 1 kg de PCVZ, foram obtidas utilizando a equação Y' = b. 10ª. Xb-1, sendo a e b o intercepto e o coeficiente de regressão, respectivamente, das equações de predição dos conteúdos corporais dos macroelementos minerais. Houve diminuição nas concentrações dos cinco macroelementos estudados no corpo vazio e no ganho de corpo vazio, com a elevação do peso vivo. As relações g Ca/100 g de proteína retida e g P/100 g de proteína retida foram iguais a 8,70 e 3,46, respectivamente.<br<Fifty F1 Limousin x Nellore bulls were allotted to ten treatments, with five concentrate levels (25; 37.5; 50; 62.5 e 75%) and two diet protein balance methods (one isoprotein and the other changing protein as diet energy changed). The roughage used was Coastcross grass hay (Cynodon dactylon). After the slaughter, all animal body parts were weighted and sampled. The samples were dried, most of the fat was extracted with ether, grinded, and the concentrations of macrominerals were determined. Ca, P, Na, K and Mg contents in the body were determined as function of their concentrations in the several parts of the body. Macrominerals contents retained in the body were determined by regression equations of the logarithm of macrominerals contents in the body as function of the logarithm of empty body weight (EBW). By deriving the prediction equations of macrominerals body content as function of the logarithm of EBW, it was obtained the net macrominerals requirements, for gains of 1 kg EBW, through the equation Y' = b. 10ª. Xb-1, being "a" and "b" intercept and the regression coefficient, respectively, of the prediction equations of macrominerals contents in the body. There was a decrease in the empty body and in the gain of empty body concentrations for all macrominerals studied, with live weight increase. The relationship g Ca/100 g of retained protein and g P/100 g of retained protein were 8.70 and 3.46, respectively.
abstractGer	Foram utilizados 50 novilhos F1 Limousin x Nelore inteiros, alocados em dez tratamentos, com cinco níveis de concentrado (25; 37,5; 50; 62,5; e 75%) e duas formas de balanceamento protéico da dieta (uma isoprotéica com 12% de proteína bruta [PB] e outra variando proteína com energia). O volumoso utilizado foi feno de capim-Coastcross (Cynodon dactylon). Após o abate, todas as partes do corpo do animal foram pesadas e amostradas. As amostras foram secas, pré-desengorduradas com éter, moídas e foram determinados os teores de macroelementos minerais. O conteúdo corporal de Ca, P, Na, K e Mg foi determinado em função das concentrações destes nas várias partes do corpo. O conteúdo de macroelementos minerais retidos no corpo foi estimado por meio de equações de regressão do logaritmo do conteúdo corporal dos macroelementos minerais em função do logaritmo do peso de corpo vazio (PCVZ). As exigências líquidas dos macroelementos minerais, para ganho de 1 kg de PCVZ, foram obtidas utilizando a equação Y' = b. 10ª. Xb-1, sendo a e b o intercepto e o coeficiente de regressão, respectivamente, das equações de predição dos conteúdos corporais dos macroelementos minerais. Houve diminuição nas concentrações dos cinco macroelementos estudados no corpo vazio e no ganho de corpo vazio, com a elevação do peso vivo. As relações g Ca/100 g de proteína retida e g P/100 g de proteína retida foram iguais a 8,70 e 3,46, respectivamente.<br<Fifty F1 Limousin x Nellore bulls were allotted to ten treatments, with five concentrate levels (25; 37.5; 50; 62.5 e 75%) and two diet protein balance methods (one isoprotein and the other changing protein as diet energy changed). The roughage used was Coastcross grass hay (Cynodon dactylon). After the slaughter, all animal body parts were weighted and sampled. The samples were dried, most of the fat was extracted with ether, grinded, and the concentrations of macrominerals were determined. Ca, P, Na, K and Mg contents in the body were determined as function of their concentrations in the several parts of the body. Macrominerals contents retained in the body were determined by regression equations of the logarithm of macrominerals contents in the body as function of the logarithm of empty body weight (EBW). By deriving the prediction equations of macrominerals body content as function of the logarithm of EBW, it was obtained the net macrominerals requirements, for gains of 1 kg EBW, through the equation Y' = b. 10ª. Xb-1, being "a" and "b" intercept and the regression coefficient, respectively, of the prediction equations of macrominerals contents in the body. There was a decrease in the empty body and in the gain of empty body concentrations for all macrominerals studied, with live weight increase. The relationship g Ca/100 g of retained protein and g P/100 g of retained protein were 8.70 and 3.46, respectively.
abstract_unstemmed	Foram utilizados 50 novilhos F1 Limousin x Nelore inteiros, alocados em dez tratamentos, com cinco níveis de concentrado (25; 37,5; 50; 62,5; e 75%) e duas formas de balanceamento protéico da dieta (uma isoprotéica com 12% de proteína bruta [PB] e outra variando proteína com energia). O volumoso utilizado foi feno de capim-Coastcross (Cynodon dactylon). Após o abate, todas as partes do corpo do animal foram pesadas e amostradas. As amostras foram secas, pré-desengorduradas com éter, moídas e foram determinados os teores de macroelementos minerais. O conteúdo corporal de Ca, P, Na, K e Mg foi determinado em função das concentrações destes nas várias partes do corpo. O conteúdo de macroelementos minerais retidos no corpo foi estimado por meio de equações de regressão do logaritmo do conteúdo corporal dos macroelementos minerais em função do logaritmo do peso de corpo vazio (PCVZ). As exigências líquidas dos macroelementos minerais, para ganho de 1 kg de PCVZ, foram obtidas utilizando a equação Y' = b. 10ª. Xb-1, sendo a e b o intercepto e o coeficiente de regressão, respectivamente, das equações de predição dos conteúdos corporais dos macroelementos minerais. Houve diminuição nas concentrações dos cinco macroelementos estudados no corpo vazio e no ganho de corpo vazio, com a elevação do peso vivo. As relações g Ca/100 g de proteína retida e g P/100 g de proteína retida foram iguais a 8,70 e 3,46, respectivamente.<br<Fifty F1 Limousin x Nellore bulls were allotted to ten treatments, with five concentrate levels (25; 37.5; 50; 62.5 e 75%) and two diet protein balance methods (one isoprotein and the other changing protein as diet energy changed). The roughage used was Coastcross grass hay (Cynodon dactylon). After the slaughter, all animal body parts were weighted and sampled. The samples were dried, most of the fat was extracted with ether, grinded, and the concentrations of macrominerals were determined. Ca, P, Na, K and Mg contents in the body were determined as function of their concentrations in the several parts of the body. Macrominerals contents retained in the body were determined by regression equations of the logarithm of macrominerals contents in the body as function of the logarithm of empty body weight (EBW). By deriving the prediction equations of macrominerals body content as function of the logarithm of EBW, it was obtained the net macrominerals requirements, for gains of 1 kg EBW, through the equation Y' = b. 10ª. Xb-1, being "a" and "b" intercept and the regression coefficient, respectively, of the prediction equations of macrominerals contents in the body. There was a decrease in the empty body and in the gain of empty body concentrations for all macrominerals studied, with live weight increase. The relationship g Ca/100 g of retained protein and g P/100 g of retained protein were 8.70 and 3.46, respectively.
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title_short	Composição corporal e exigências líquidas e dietéticas de macroelementos minerais de bovinos F1 Limousin x Nelore não-castrados Body composition and net and dietary macrominerals requirements of F1 Limousin x Nellore bulls
url	https://doi.org/10.1590/S1516-35982002000500028 https://doaj.org/article/30638821d68946c4b4d8a6644ee06955 http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982002000500028 https://doaj.org/toc/1516-3598 https://doaj.org/toc/1806-9290
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O volumoso utilizado foi feno de capim-Coastcross (Cynodon dactylon). Após o abate, todas as partes do corpo do animal foram pesadas e amostradas. As amostras foram secas, pré-desengorduradas com éter, moídas e foram determinados os teores de macroelementos minerais. O conteúdo corporal de Ca, P, Na, K e Mg foi determinado em função das concentrações destes nas várias partes do corpo. O conteúdo de macroelementos minerais retidos no corpo foi estimado por meio de equações de regressão do logaritmo do conteúdo corporal dos macroelementos minerais em função do logaritmo do peso de corpo vazio (PCVZ). As exigências líquidas dos macroelementos minerais, para ganho de 1 kg de PCVZ, foram obtidas utilizando a equação Y' = b. 10ª. Xb-1, sendo a e b o intercepto e o coeficiente de regressão, respectivamente, das equações de predição dos conteúdos corporais dos macroelementos minerais. Houve diminuição nas concentrações dos cinco macroelementos estudados no corpo vazio e no ganho de corpo vazio, com a elevação do peso vivo. As relações g Ca/100 g de proteína retida e g P/100 g de proteína retida foram iguais a 8,70 e 3,46, respectivamente.<br<Fifty F1 Limousin x Nellore bulls were allotted to ten treatments, with five concentrate levels (25; 37.5; 50; 62.5 e 75%) and two diet protein balance methods (one isoprotein and the other changing protein as diet energy changed). The roughage used was Coastcross grass hay (Cynodon dactylon). After the slaughter, all animal body parts were weighted and sampled. The samples were dried, most of the fat was extracted with ether, grinded, and the concentrations of macrominerals were determined. Ca, P, Na, K and Mg contents in the body were determined as function of their concentrations in the several parts of the body. Macrominerals contents retained in the body were determined by regression equations of the logarithm of macrominerals contents in the body as function of the logarithm of empty body weight (EBW). By deriving the prediction equations of macrominerals body content as function of the logarithm of EBW, it was obtained the net macrominerals requirements, for gains of 1 kg EBW, through the equation Y' = b. 10ª. Xb-1, being "a" and "b" intercept and the regression coefficient, respectively, of the prediction equations of macrominerals contents in the body. There was a decrease in the empty body and in the gain of empty body concentrations for all macrominerals studied, with live weight increase. 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Composição corporal e exigências líquidas e dietéticas de macroelementos minerais de bovinos F1 Limousin x Nelore não-castrados Body composition and net and dietary macrominerals requirements of F1 Limousin x Nellore bulls

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