Nutrient allocation, accumulation and above-ground biomass in grey alder and hybrid alder plantations

The aim of the present work was to investigate the nutrient (N,P,K) allocation and accumulation in grey alder (Alnus incana (L.) Moench) and hybrid alder (Alnus incana (L.) Moench x Alnus glutinosa (L.) Gaertn.) plantations growing on former agricultural land and to estimate the above-ground biomass...
Ausführliche Beschreibung

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Autor*in:	Uri, Veiko [verfasserIn] Tullus, Hardi [verfasserIn] Lõhmus, Krista [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2003

Übergeordnetes Werk:	In: Silva Fennica - Finnish Society of Forest Science, 2019, 37(2003), 3
Übergeordnetes Werk:	volume:37 ; year:2003 ; number:3

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.14214/sf.490

Katalog-ID:	DOAJ065182324

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allfields	10.14214/sf.490 doi (DE-627)DOAJ065182324 (DE-599)DOAJ9abbc6ffa0224e1da6731215d7912a45 DE-627 ger DE-627 rakwb eng SD1-669.5 Uri, Veiko verfasserin aut Nutrient allocation, accumulation and above-ground biomass in grey alder and hybrid alder plantations 2003 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The aim of the present work was to investigate the nutrient (N,P,K) allocation and accumulation in grey alder (Alnus incana (L.) Moench) and hybrid alder (Alnus incana (L.) Moench x Alnus glutinosa (L.) Gaertn.) plantations growing on former agricultural land and to estimate the above-ground biomass production during 4 years after establishment. In August of the 4th year, when leaf mass was at its maximum, the amount of nitrogen accumulated in above-ground biomass of grey alder stand was 142.0 kg haâ1, the amount of phosphorus 16.3 kg haâ1 and the amount of potassium 49.5 kg haâ1. The amount of nitrogen accumulated in a hybrid alder stand totalled 76.8 kg haâ1, that of phosphorus 6.2 kg haâ1 and that of potassium 28.2 kg haâ1. The smaller amounts of N,P and K bound in the hybrid alder plantation are related to the smaller biomass of the stand. Still, the amounts of N,P and K consumed for the production of one ton of biomass were similar in the case of up to 4-year-old grey alder and hybrid alder stands. In the 4th year, the amount of nutrients consumed in one ton of biomass produced were: 16.0 kg N, 1.6 kg P and 5.4 kg K for grey alder and 14.6 kg N, 1.1 kg P and 5.2 kg K for hybrid alder. In the 4th year the total above-ground biomass (dry mass) of grey alder (15750 plants haâ1) amounted to 12.3 t haâ1, current annual increment being 6.7 t haâ1. In hybrid alder stands (6700 plants haâ1), the respective figures were 6.1 t haâ1 and 4.5 t haâ1. Comparison of the production capacity on the basis of mean stem mass in the 4th year revealed that the stem mass of grey alder exceeded that of hybrid alder (0.64 kg and 0.58 kg, respectively). Grey alder outpaced hybrid alder in height growth; in the 4th year after establishment, the mean height of the grey alder stand was 4.6 Â± 0.9 m and that of the hybrid alder plantation 3.5 Â± 0.9 m. Forestry Tullus, Hardi verfasserin aut Lõhmus, Krista verfasserin aut In Silva Fennica Finnish Society of Forest Science, 2019 37(2003), 3 (DE-627)320575039 (DE-600)2016943-7 22424075 nnns volume:37 year:2003 number:3 https://doi.org/10.14214/sf.490 kostenfrei https://doaj.org/article/9abbc6ffa0224e1da6731215d7912a45 kostenfrei https://www.silvafennica.fi/article/490 kostenfrei https://doaj.org/toc/2242-4075 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 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_4367 GBV_ILN_4700 AR 37 2003 3
spelling	10.14214/sf.490 doi (DE-627)DOAJ065182324 (DE-599)DOAJ9abbc6ffa0224e1da6731215d7912a45 DE-627 ger DE-627 rakwb eng SD1-669.5 Uri, Veiko verfasserin aut Nutrient allocation, accumulation and above-ground biomass in grey alder and hybrid alder plantations 2003 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The aim of the present work was to investigate the nutrient (N,P,K) allocation and accumulation in grey alder (Alnus incana (L.) Moench) and hybrid alder (Alnus incana (L.) Moench x Alnus glutinosa (L.) Gaertn.) plantations growing on former agricultural land and to estimate the above-ground biomass production during 4 years after establishment. In August of the 4th year, when leaf mass was at its maximum, the amount of nitrogen accumulated in above-ground biomass of grey alder stand was 142.0 kg haâ1, the amount of phosphorus 16.3 kg haâ1 and the amount of potassium 49.5 kg haâ1. The amount of nitrogen accumulated in a hybrid alder stand totalled 76.8 kg haâ1, that of phosphorus 6.2 kg haâ1 and that of potassium 28.2 kg haâ1. The smaller amounts of N,P and K bound in the hybrid alder plantation are related to the smaller biomass of the stand. Still, the amounts of N,P and K consumed for the production of one ton of biomass were similar in the case of up to 4-year-old grey alder and hybrid alder stands. In the 4th year, the amount of nutrients consumed in one ton of biomass produced were: 16.0 kg N, 1.6 kg P and 5.4 kg K for grey alder and 14.6 kg N, 1.1 kg P and 5.2 kg K for hybrid alder. In the 4th year the total above-ground biomass (dry mass) of grey alder (15750 plants haâ1) amounted to 12.3 t haâ1, current annual increment being 6.7 t haâ1. In hybrid alder stands (6700 plants haâ1), the respective figures were 6.1 t haâ1 and 4.5 t haâ1. Comparison of the production capacity on the basis of mean stem mass in the 4th year revealed that the stem mass of grey alder exceeded that of hybrid alder (0.64 kg and 0.58 kg, respectively). Grey alder outpaced hybrid alder in height growth; in the 4th year after establishment, the mean height of the grey alder stand was 4.6 Â± 0.9 m and that of the hybrid alder plantation 3.5 Â± 0.9 m. Forestry Tullus, Hardi verfasserin aut Lõhmus, Krista verfasserin aut In Silva Fennica Finnish Society of Forest Science, 2019 37(2003), 3 (DE-627)320575039 (DE-600)2016943-7 22424075 nnns volume:37 year:2003 number:3 https://doi.org/10.14214/sf.490 kostenfrei https://doaj.org/article/9abbc6ffa0224e1da6731215d7912a45 kostenfrei https://www.silvafennica.fi/article/490 kostenfrei https://doaj.org/toc/2242-4075 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 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_4367 GBV_ILN_4700 AR 37 2003 3
allfields_unstemmed	10.14214/sf.490 doi (DE-627)DOAJ065182324 (DE-599)DOAJ9abbc6ffa0224e1da6731215d7912a45 DE-627 ger DE-627 rakwb eng SD1-669.5 Uri, Veiko verfasserin aut Nutrient allocation, accumulation and above-ground biomass in grey alder and hybrid alder plantations 2003 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The aim of the present work was to investigate the nutrient (N,P,K) allocation and accumulation in grey alder (Alnus incana (L.) Moench) and hybrid alder (Alnus incana (L.) Moench x Alnus glutinosa (L.) Gaertn.) plantations growing on former agricultural land and to estimate the above-ground biomass production during 4 years after establishment. In August of the 4th year, when leaf mass was at its maximum, the amount of nitrogen accumulated in above-ground biomass of grey alder stand was 142.0 kg haâ1, the amount of phosphorus 16.3 kg haâ1 and the amount of potassium 49.5 kg haâ1. The amount of nitrogen accumulated in a hybrid alder stand totalled 76.8 kg haâ1, that of phosphorus 6.2 kg haâ1 and that of potassium 28.2 kg haâ1. The smaller amounts of N,P and K bound in the hybrid alder plantation are related to the smaller biomass of the stand. Still, the amounts of N,P and K consumed for the production of one ton of biomass were similar in the case of up to 4-year-old grey alder and hybrid alder stands. In the 4th year, the amount of nutrients consumed in one ton of biomass produced were: 16.0 kg N, 1.6 kg P and 5.4 kg K for grey alder and 14.6 kg N, 1.1 kg P and 5.2 kg K for hybrid alder. In the 4th year the total above-ground biomass (dry mass) of grey alder (15750 plants haâ1) amounted to 12.3 t haâ1, current annual increment being 6.7 t haâ1. In hybrid alder stands (6700 plants haâ1), the respective figures were 6.1 t haâ1 and 4.5 t haâ1. Comparison of the production capacity on the basis of mean stem mass in the 4th year revealed that the stem mass of grey alder exceeded that of hybrid alder (0.64 kg and 0.58 kg, respectively). Grey alder outpaced hybrid alder in height growth; in the 4th year after establishment, the mean height of the grey alder stand was 4.6 Â± 0.9 m and that of the hybrid alder plantation 3.5 Â± 0.9 m. Forestry Tullus, Hardi verfasserin aut Lõhmus, Krista verfasserin aut In Silva Fennica Finnish Society of Forest Science, 2019 37(2003), 3 (DE-627)320575039 (DE-600)2016943-7 22424075 nnns volume:37 year:2003 number:3 https://doi.org/10.14214/sf.490 kostenfrei https://doaj.org/article/9abbc6ffa0224e1da6731215d7912a45 kostenfrei https://www.silvafennica.fi/article/490 kostenfrei https://doaj.org/toc/2242-4075 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 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_4367 GBV_ILN_4700 AR 37 2003 3
allfieldsGer	10.14214/sf.490 doi (DE-627)DOAJ065182324 (DE-599)DOAJ9abbc6ffa0224e1da6731215d7912a45 DE-627 ger DE-627 rakwb eng SD1-669.5 Uri, Veiko verfasserin aut Nutrient allocation, accumulation and above-ground biomass in grey alder and hybrid alder plantations 2003 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The aim of the present work was to investigate the nutrient (N,P,K) allocation and accumulation in grey alder (Alnus incana (L.) Moench) and hybrid alder (Alnus incana (L.) Moench x Alnus glutinosa (L.) Gaertn.) plantations growing on former agricultural land and to estimate the above-ground biomass production during 4 years after establishment. In August of the 4th year, when leaf mass was at its maximum, the amount of nitrogen accumulated in above-ground biomass of grey alder stand was 142.0 kg haâ1, the amount of phosphorus 16.3 kg haâ1 and the amount of potassium 49.5 kg haâ1. The amount of nitrogen accumulated in a hybrid alder stand totalled 76.8 kg haâ1, that of phosphorus 6.2 kg haâ1 and that of potassium 28.2 kg haâ1. The smaller amounts of N,P and K bound in the hybrid alder plantation are related to the smaller biomass of the stand. Still, the amounts of N,P and K consumed for the production of one ton of biomass were similar in the case of up to 4-year-old grey alder and hybrid alder stands. In the 4th year, the amount of nutrients consumed in one ton of biomass produced were: 16.0 kg N, 1.6 kg P and 5.4 kg K for grey alder and 14.6 kg N, 1.1 kg P and 5.2 kg K for hybrid alder. In the 4th year the total above-ground biomass (dry mass) of grey alder (15750 plants haâ1) amounted to 12.3 t haâ1, current annual increment being 6.7 t haâ1. In hybrid alder stands (6700 plants haâ1), the respective figures were 6.1 t haâ1 and 4.5 t haâ1. Comparison of the production capacity on the basis of mean stem mass in the 4th year revealed that the stem mass of grey alder exceeded that of hybrid alder (0.64 kg and 0.58 kg, respectively). Grey alder outpaced hybrid alder in height growth; in the 4th year after establishment, the mean height of the grey alder stand was 4.6 Â± 0.9 m and that of the hybrid alder plantation 3.5 Â± 0.9 m. Forestry Tullus, Hardi verfasserin aut Lõhmus, Krista verfasserin aut In Silva Fennica Finnish Society of Forest Science, 2019 37(2003), 3 (DE-627)320575039 (DE-600)2016943-7 22424075 nnns volume:37 year:2003 number:3 https://doi.org/10.14214/sf.490 kostenfrei https://doaj.org/article/9abbc6ffa0224e1da6731215d7912a45 kostenfrei https://www.silvafennica.fi/article/490 kostenfrei https://doaj.org/toc/2242-4075 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 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_4367 GBV_ILN_4700 AR 37 2003 3
allfieldsSound	10.14214/sf.490 doi (DE-627)DOAJ065182324 (DE-599)DOAJ9abbc6ffa0224e1da6731215d7912a45 DE-627 ger DE-627 rakwb eng SD1-669.5 Uri, Veiko verfasserin aut Nutrient allocation, accumulation and above-ground biomass in grey alder and hybrid alder plantations 2003 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The aim of the present work was to investigate the nutrient (N,P,K) allocation and accumulation in grey alder (Alnus incana (L.) Moench) and hybrid alder (Alnus incana (L.) Moench x Alnus glutinosa (L.) Gaertn.) plantations growing on former agricultural land and to estimate the above-ground biomass production during 4 years after establishment. In August of the 4th year, when leaf mass was at its maximum, the amount of nitrogen accumulated in above-ground biomass of grey alder stand was 142.0 kg haâ1, the amount of phosphorus 16.3 kg haâ1 and the amount of potassium 49.5 kg haâ1. The amount of nitrogen accumulated in a hybrid alder stand totalled 76.8 kg haâ1, that of phosphorus 6.2 kg haâ1 and that of potassium 28.2 kg haâ1. The smaller amounts of N,P and K bound in the hybrid alder plantation are related to the smaller biomass of the stand. Still, the amounts of N,P and K consumed for the production of one ton of biomass were similar in the case of up to 4-year-old grey alder and hybrid alder stands. In the 4th year, the amount of nutrients consumed in one ton of biomass produced were: 16.0 kg N, 1.6 kg P and 5.4 kg K for grey alder and 14.6 kg N, 1.1 kg P and 5.2 kg K for hybrid alder. In the 4th year the total above-ground biomass (dry mass) of grey alder (15750 plants haâ1) amounted to 12.3 t haâ1, current annual increment being 6.7 t haâ1. In hybrid alder stands (6700 plants haâ1), the respective figures were 6.1 t haâ1 and 4.5 t haâ1. Comparison of the production capacity on the basis of mean stem mass in the 4th year revealed that the stem mass of grey alder exceeded that of hybrid alder (0.64 kg and 0.58 kg, respectively). Grey alder outpaced hybrid alder in height growth; in the 4th year after establishment, the mean height of the grey alder stand was 4.6 Â± 0.9 m and that of the hybrid alder plantation 3.5 Â± 0.9 m. Forestry Tullus, Hardi verfasserin aut Lõhmus, Krista verfasserin aut In Silva Fennica Finnish Society of Forest Science, 2019 37(2003), 3 (DE-627)320575039 (DE-600)2016943-7 22424075 nnns volume:37 year:2003 number:3 https://doi.org/10.14214/sf.490 kostenfrei https://doaj.org/article/9abbc6ffa0224e1da6731215d7912a45 kostenfrei https://www.silvafennica.fi/article/490 kostenfrei https://doaj.org/toc/2242-4075 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 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_4367 GBV_ILN_4700 AR 37 2003 3
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callnumber-first	S - Agriculture
author	Uri, Veiko
spellingShingle	Uri, Veiko misc SD1-669.5 misc Forestry Nutrient allocation, accumulation and above-ground biomass in grey alder and hybrid alder plantations
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topic_title	SD1-669.5 Nutrient allocation, accumulation and above-ground biomass in grey alder and hybrid alder plantations
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title	Nutrient allocation, accumulation and above-ground biomass in grey alder and hybrid alder plantations
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title_full	Nutrient allocation, accumulation and above-ground biomass in grey alder and hybrid alder plantations
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author_browse	Uri, Veiko Tullus, Hardi Lõhmus, Krista
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title_sort	nutrient allocation, accumulation and above-ground biomass in grey alder and hybrid alder plantations
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title_auth	Nutrient allocation, accumulation and above-ground biomass in grey alder and hybrid alder plantations
abstract	The aim of the present work was to investigate the nutrient (N,P,K) allocation and accumulation in grey alder (Alnus incana (L.) Moench) and hybrid alder (Alnus incana (L.) Moench x Alnus glutinosa (L.) Gaertn.) plantations growing on former agricultural land and to estimate the above-ground biomass production during 4 years after establishment. In August of the 4th year, when leaf mass was at its maximum, the amount of nitrogen accumulated in above-ground biomass of grey alder stand was 142.0 kg haâ1, the amount of phosphorus 16.3 kg haâ1 and the amount of potassium 49.5 kg haâ1. The amount of nitrogen accumulated in a hybrid alder stand totalled 76.8 kg haâ1, that of phosphorus 6.2 kg haâ1 and that of potassium 28.2 kg haâ1. The smaller amounts of N,P and K bound in the hybrid alder plantation are related to the smaller biomass of the stand. Still, the amounts of N,P and K consumed for the production of one ton of biomass were similar in the case of up to 4-year-old grey alder and hybrid alder stands. In the 4th year, the amount of nutrients consumed in one ton of biomass produced were: 16.0 kg N, 1.6 kg P and 5.4 kg K for grey alder and 14.6 kg N, 1.1 kg P and 5.2 kg K for hybrid alder. In the 4th year the total above-ground biomass (dry mass) of grey alder (15750 plants haâ1) amounted to 12.3 t haâ1, current annual increment being 6.7 t haâ1. In hybrid alder stands (6700 plants haâ1), the respective figures were 6.1 t haâ1 and 4.5 t haâ1. Comparison of the production capacity on the basis of mean stem mass in the 4th year revealed that the stem mass of grey alder exceeded that of hybrid alder (0.64 kg and 0.58 kg, respectively). Grey alder outpaced hybrid alder in height growth; in the 4th year after establishment, the mean height of the grey alder stand was 4.6 Â± 0.9 m and that of the hybrid alder plantation 3.5 Â± 0.9 m.
abstractGer	The aim of the present work was to investigate the nutrient (N,P,K) allocation and accumulation in grey alder (Alnus incana (L.) Moench) and hybrid alder (Alnus incana (L.) Moench x Alnus glutinosa (L.) Gaertn.) plantations growing on former agricultural land and to estimate the above-ground biomass production during 4 years after establishment. In August of the 4th year, when leaf mass was at its maximum, the amount of nitrogen accumulated in above-ground biomass of grey alder stand was 142.0 kg haâ1, the amount of phosphorus 16.3 kg haâ1 and the amount of potassium 49.5 kg haâ1. The amount of nitrogen accumulated in a hybrid alder stand totalled 76.8 kg haâ1, that of phosphorus 6.2 kg haâ1 and that of potassium 28.2 kg haâ1. The smaller amounts of N,P and K bound in the hybrid alder plantation are related to the smaller biomass of the stand. Still, the amounts of N,P and K consumed for the production of one ton of biomass were similar in the case of up to 4-year-old grey alder and hybrid alder stands. In the 4th year, the amount of nutrients consumed in one ton of biomass produced were: 16.0 kg N, 1.6 kg P and 5.4 kg K for grey alder and 14.6 kg N, 1.1 kg P and 5.2 kg K for hybrid alder. In the 4th year the total above-ground biomass (dry mass) of grey alder (15750 plants haâ1) amounted to 12.3 t haâ1, current annual increment being 6.7 t haâ1. In hybrid alder stands (6700 plants haâ1), the respective figures were 6.1 t haâ1 and 4.5 t haâ1. Comparison of the production capacity on the basis of mean stem mass in the 4th year revealed that the stem mass of grey alder exceeded that of hybrid alder (0.64 kg and 0.58 kg, respectively). Grey alder outpaced hybrid alder in height growth; in the 4th year after establishment, the mean height of the grey alder stand was 4.6 Â± 0.9 m and that of the hybrid alder plantation 3.5 Â± 0.9 m.
abstract_unstemmed	The aim of the present work was to investigate the nutrient (N,P,K) allocation and accumulation in grey alder (Alnus incana (L.) Moench) and hybrid alder (Alnus incana (L.) Moench x Alnus glutinosa (L.) Gaertn.) plantations growing on former agricultural land and to estimate the above-ground biomass production during 4 years after establishment. In August of the 4th year, when leaf mass was at its maximum, the amount of nitrogen accumulated in above-ground biomass of grey alder stand was 142.0 kg haâ1, the amount of phosphorus 16.3 kg haâ1 and the amount of potassium 49.5 kg haâ1. The amount of nitrogen accumulated in a hybrid alder stand totalled 76.8 kg haâ1, that of phosphorus 6.2 kg haâ1 and that of potassium 28.2 kg haâ1. The smaller amounts of N,P and K bound in the hybrid alder plantation are related to the smaller biomass of the stand. Still, the amounts of N,P and K consumed for the production of one ton of biomass were similar in the case of up to 4-year-old grey alder and hybrid alder stands. In the 4th year, the amount of nutrients consumed in one ton of biomass produced were: 16.0 kg N, 1.6 kg P and 5.4 kg K for grey alder and 14.6 kg N, 1.1 kg P and 5.2 kg K for hybrid alder. In the 4th year the total above-ground biomass (dry mass) of grey alder (15750 plants haâ1) amounted to 12.3 t haâ1, current annual increment being 6.7 t haâ1. In hybrid alder stands (6700 plants haâ1), the respective figures were 6.1 t haâ1 and 4.5 t haâ1. Comparison of the production capacity on the basis of mean stem mass in the 4th year revealed that the stem mass of grey alder exceeded that of hybrid alder (0.64 kg and 0.58 kg, respectively). Grey alder outpaced hybrid alder in height growth; in the 4th year after establishment, the mean height of the grey alder stand was 4.6 Â± 0.9 m and that of the hybrid alder plantation 3.5 Â± 0.9 m.
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title_short	Nutrient allocation, accumulation and above-ground biomass in grey alder and hybrid alder plantations
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In the 4th year, the amount of nutrients consumed in one ton of biomass produced were: 16.0 kg N, 1.6 kg P and 5.4 kg K for grey alder and 14.6 kg N, 1.1 kg P and 5.2 kg K for hybrid alder. In the 4th year the total above-ground biomass (dry mass) of grey alder (15750 plants haâ1) amounted to 12.3 t haâ1, current annual increment being 6.7 t haâ1. In hybrid alder stands (6700 plants haâ1), the respective figures were 6.1 t haâ1 and 4.5 t haâ1. Comparison of the production capacity on the basis of mean stem mass in the 4th year revealed that the stem mass of grey alder exceeded that of hybrid alder (0.64 kg and 0.58 kg, respectively). 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Nutrient allocation, accumulation and above-ground biomass in grey alder and hybrid alder plantations

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