Increasing air humidity – a climate trend predicted for northern latitudes – alters the chemical composition of stemwood in silver birch and hybrid aspen
We studied the physicochemical properties of stemwood in saplings of silver birch ( Roth) and hybrid aspen ( L. Ã Michx.), grown for four years under artificially elevated relative air humidity (on average by 7%) in field conditions, using the Free Air Humidity Manipulation (FAHM) research facility...
Ausführliche Beschreibung
Autor*in: |
Tullus, Arvo [verfasserIn] Sellin, Arne [verfasserIn] Kupper, Priit [verfasserIn] Lutter, Reimo [verfasserIn] Pärn, Linnar [verfasserIn] Jasinska, Anna [verfasserIn] Alber, Meeli [verfasserIn] Kukk, Maarja [verfasserIn] Tullus, Tea [verfasserIn] Tullus, Hardi [verfasserIn] Lõhmus, Krista [verfasserIn] Sõber, Anu [verfasserIn] |
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Format: |
E-Artikel |
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Sprache: |
Englisch |
Erschienen: |
2014 |
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Übergeordnetes Werk: |
In: Silva Fennica - Finnish Society of Forest Science, 2019, 48(2014), 4 |
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Übergeordnetes Werk: |
volume:48 ; year:2014 ; number:4 |
Links: |
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DOI / URN: |
10.14214/sf.1107 |
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Katalog-ID: |
DOAJ043383491 |
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520 | |a We studied the physicochemical properties of stemwood in saplings of silver birch ( Roth) and hybrid aspen ( L. Ã Michx.), grown for four years under artificially elevated relative air humidity (on average by 7%) in field conditions, using the Free Air Humidity Manipulation (FAHM) research facility in Estonia. Altogether 91 sample trees from three experimental plots with manipulated air humidity and from three control plots were cut in the dormant season and sampled for the analysis of cellulose, hemicellulose, acid detergent lignin, macronutrients (N, P, K), ash content, density, and calorific value of wood. The analysed trees grew significantly more slowly under elevated humidity conditions, with a more pronounced effect on aspens. Significantly higher concentrations of N and P were observed in the stemwood of both aspens and birches grown under elevated humidity. This could be the result of a change in the content of living parenchyma cells and/or enhanced retranslocation of nutrients into wood parenchyma. Additionally, humidification resulted in a significantly higher concentration of cellulose and a lower concentration of hemicellulose in aspen stemwood, and in significantly lower concentrations of cellulose and K in birch stemwood. Elevated humidity did not affect lignin concentration, ash content, basic density and calorific value of stemwood. Results from the FAHM experiment suggest that the increasing air humidity accompanying global warming at northern latitudes will affect the growth and functioning of deciduous trees and forests, with obvious consequences also for forest management and industry.Betula pendulaPopulus tremulaP. tremuloides | ||
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10.14214/sf.1107 doi (DE-627)DOAJ043383491 (DE-599)DOAJ594802926518443884209fd9552bc68e DE-627 ger DE-627 rakwb eng SD1-669.5 Tullus, Arvo verfasserin aut Increasing air humidity – a climate trend predicted for northern latitudes – alters the chemical composition of stemwood in silver birch and hybrid aspen 2014 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier We studied the physicochemical properties of stemwood in saplings of silver birch ( Roth) and hybrid aspen ( L. Ã Michx.), grown for four years under artificially elevated relative air humidity (on average by 7%) in field conditions, using the Free Air Humidity Manipulation (FAHM) research facility in Estonia. Altogether 91 sample trees from three experimental plots with manipulated air humidity and from three control plots were cut in the dormant season and sampled for the analysis of cellulose, hemicellulose, acid detergent lignin, macronutrients (N, P, K), ash content, density, and calorific value of wood. The analysed trees grew significantly more slowly under elevated humidity conditions, with a more pronounced effect on aspens. Significantly higher concentrations of N and P were observed in the stemwood of both aspens and birches grown under elevated humidity. This could be the result of a change in the content of living parenchyma cells and/or enhanced retranslocation of nutrients into wood parenchyma. Additionally, humidification resulted in a significantly higher concentration of cellulose and a lower concentration of hemicellulose in aspen stemwood, and in significantly lower concentrations of cellulose and K in birch stemwood. Elevated humidity did not affect lignin concentration, ash content, basic density and calorific value of stemwood. Results from the FAHM experiment suggest that the increasing air humidity accompanying global warming at northern latitudes will affect the growth and functioning of deciduous trees and forests, with obvious consequences also for forest management and industry.Betula pendulaPopulus tremulaP. tremuloides Forestry Sellin, Arne verfasserin aut Kupper, Priit verfasserin aut Lutter, Reimo verfasserin aut Pärn, Linnar verfasserin aut Jasinska, Anna verfasserin aut Alber, Meeli verfasserin aut Kukk, Maarja verfasserin aut Tullus, Tea verfasserin aut Tullus, Hardi verfasserin aut Lõhmus, Krista verfasserin aut Sõber, Anu verfasserin aut In Silva Fennica Finnish Society of Forest Science, 2019 48(2014), 4 (DE-627)320575039 (DE-600)2016943-7 22424075 nnns volume:48 year:2014 number:4 https://doi.org/10.14214/sf.1107 kostenfrei https://doaj.org/article/594802926518443884209fd9552bc68e kostenfrei https://www.silvafennica.fi/article/1107 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 48 2014 4 |
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10.14214/sf.1107 doi (DE-627)DOAJ043383491 (DE-599)DOAJ594802926518443884209fd9552bc68e DE-627 ger DE-627 rakwb eng SD1-669.5 Tullus, Arvo verfasserin aut Increasing air humidity – a climate trend predicted for northern latitudes – alters the chemical composition of stemwood in silver birch and hybrid aspen 2014 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier We studied the physicochemical properties of stemwood in saplings of silver birch ( Roth) and hybrid aspen ( L. Ã Michx.), grown for four years under artificially elevated relative air humidity (on average by 7%) in field conditions, using the Free Air Humidity Manipulation (FAHM) research facility in Estonia. Altogether 91 sample trees from three experimental plots with manipulated air humidity and from three control plots were cut in the dormant season and sampled for the analysis of cellulose, hemicellulose, acid detergent lignin, macronutrients (N, P, K), ash content, density, and calorific value of wood. The analysed trees grew significantly more slowly under elevated humidity conditions, with a more pronounced effect on aspens. Significantly higher concentrations of N and P were observed in the stemwood of both aspens and birches grown under elevated humidity. This could be the result of a change in the content of living parenchyma cells and/or enhanced retranslocation of nutrients into wood parenchyma. Additionally, humidification resulted in a significantly higher concentration of cellulose and a lower concentration of hemicellulose in aspen stemwood, and in significantly lower concentrations of cellulose and K in birch stemwood. Elevated humidity did not affect lignin concentration, ash content, basic density and calorific value of stemwood. Results from the FAHM experiment suggest that the increasing air humidity accompanying global warming at northern latitudes will affect the growth and functioning of deciduous trees and forests, with obvious consequences also for forest management and industry.Betula pendulaPopulus tremulaP. tremuloides Forestry Sellin, Arne verfasserin aut Kupper, Priit verfasserin aut Lutter, Reimo verfasserin aut Pärn, Linnar verfasserin aut Jasinska, Anna verfasserin aut Alber, Meeli verfasserin aut Kukk, Maarja verfasserin aut Tullus, Tea verfasserin aut Tullus, Hardi verfasserin aut Lõhmus, Krista verfasserin aut Sõber, Anu verfasserin aut In Silva Fennica Finnish Society of Forest Science, 2019 48(2014), 4 (DE-627)320575039 (DE-600)2016943-7 22424075 nnns volume:48 year:2014 number:4 https://doi.org/10.14214/sf.1107 kostenfrei https://doaj.org/article/594802926518443884209fd9552bc68e kostenfrei https://www.silvafennica.fi/article/1107 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 48 2014 4 |
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10.14214/sf.1107 doi (DE-627)DOAJ043383491 (DE-599)DOAJ594802926518443884209fd9552bc68e DE-627 ger DE-627 rakwb eng SD1-669.5 Tullus, Arvo verfasserin aut Increasing air humidity – a climate trend predicted for northern latitudes – alters the chemical composition of stemwood in silver birch and hybrid aspen 2014 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier We studied the physicochemical properties of stemwood in saplings of silver birch ( Roth) and hybrid aspen ( L. Ã Michx.), grown for four years under artificially elevated relative air humidity (on average by 7%) in field conditions, using the Free Air Humidity Manipulation (FAHM) research facility in Estonia. Altogether 91 sample trees from three experimental plots with manipulated air humidity and from three control plots were cut in the dormant season and sampled for the analysis of cellulose, hemicellulose, acid detergent lignin, macronutrients (N, P, K), ash content, density, and calorific value of wood. The analysed trees grew significantly more slowly under elevated humidity conditions, with a more pronounced effect on aspens. Significantly higher concentrations of N and P were observed in the stemwood of both aspens and birches grown under elevated humidity. This could be the result of a change in the content of living parenchyma cells and/or enhanced retranslocation of nutrients into wood parenchyma. Additionally, humidification resulted in a significantly higher concentration of cellulose and a lower concentration of hemicellulose in aspen stemwood, and in significantly lower concentrations of cellulose and K in birch stemwood. Elevated humidity did not affect lignin concentration, ash content, basic density and calorific value of stemwood. Results from the FAHM experiment suggest that the increasing air humidity accompanying global warming at northern latitudes will affect the growth and functioning of deciduous trees and forests, with obvious consequences also for forest management and industry.Betula pendulaPopulus tremulaP. tremuloides Forestry Sellin, Arne verfasserin aut Kupper, Priit verfasserin aut Lutter, Reimo verfasserin aut Pärn, Linnar verfasserin aut Jasinska, Anna verfasserin aut Alber, Meeli verfasserin aut Kukk, Maarja verfasserin aut Tullus, Tea verfasserin aut Tullus, Hardi verfasserin aut Lõhmus, Krista verfasserin aut Sõber, Anu verfasserin aut In Silva Fennica Finnish Society of Forest Science, 2019 48(2014), 4 (DE-627)320575039 (DE-600)2016943-7 22424075 nnns volume:48 year:2014 number:4 https://doi.org/10.14214/sf.1107 kostenfrei https://doaj.org/article/594802926518443884209fd9552bc68e kostenfrei https://www.silvafennica.fi/article/1107 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 48 2014 4 |
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10.14214/sf.1107 doi (DE-627)DOAJ043383491 (DE-599)DOAJ594802926518443884209fd9552bc68e DE-627 ger DE-627 rakwb eng SD1-669.5 Tullus, Arvo verfasserin aut Increasing air humidity – a climate trend predicted for northern latitudes – alters the chemical composition of stemwood in silver birch and hybrid aspen 2014 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier We studied the physicochemical properties of stemwood in saplings of silver birch ( Roth) and hybrid aspen ( L. Ã Michx.), grown for four years under artificially elevated relative air humidity (on average by 7%) in field conditions, using the Free Air Humidity Manipulation (FAHM) research facility in Estonia. Altogether 91 sample trees from three experimental plots with manipulated air humidity and from three control plots were cut in the dormant season and sampled for the analysis of cellulose, hemicellulose, acid detergent lignin, macronutrients (N, P, K), ash content, density, and calorific value of wood. The analysed trees grew significantly more slowly under elevated humidity conditions, with a more pronounced effect on aspens. Significantly higher concentrations of N and P were observed in the stemwood of both aspens and birches grown under elevated humidity. This could be the result of a change in the content of living parenchyma cells and/or enhanced retranslocation of nutrients into wood parenchyma. Additionally, humidification resulted in a significantly higher concentration of cellulose and a lower concentration of hemicellulose in aspen stemwood, and in significantly lower concentrations of cellulose and K in birch stemwood. Elevated humidity did not affect lignin concentration, ash content, basic density and calorific value of stemwood. Results from the FAHM experiment suggest that the increasing air humidity accompanying global warming at northern latitudes will affect the growth and functioning of deciduous trees and forests, with obvious consequences also for forest management and industry.Betula pendulaPopulus tremulaP. tremuloides Forestry Sellin, Arne verfasserin aut Kupper, Priit verfasserin aut Lutter, Reimo verfasserin aut Pärn, Linnar verfasserin aut Jasinska, Anna verfasserin aut Alber, Meeli verfasserin aut Kukk, Maarja verfasserin aut Tullus, Tea verfasserin aut Tullus, Hardi verfasserin aut Lõhmus, Krista verfasserin aut Sõber, Anu verfasserin aut In Silva Fennica Finnish Society of Forest Science, 2019 48(2014), 4 (DE-627)320575039 (DE-600)2016943-7 22424075 nnns volume:48 year:2014 number:4 https://doi.org/10.14214/sf.1107 kostenfrei https://doaj.org/article/594802926518443884209fd9552bc68e kostenfrei https://www.silvafennica.fi/article/1107 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 48 2014 4 |
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10.14214/sf.1107 doi (DE-627)DOAJ043383491 (DE-599)DOAJ594802926518443884209fd9552bc68e DE-627 ger DE-627 rakwb eng SD1-669.5 Tullus, Arvo verfasserin aut Increasing air humidity – a climate trend predicted for northern latitudes – alters the chemical composition of stemwood in silver birch and hybrid aspen 2014 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier We studied the physicochemical properties of stemwood in saplings of silver birch ( Roth) and hybrid aspen ( L. Ã Michx.), grown for four years under artificially elevated relative air humidity (on average by 7%) in field conditions, using the Free Air Humidity Manipulation (FAHM) research facility in Estonia. Altogether 91 sample trees from three experimental plots with manipulated air humidity and from three control plots were cut in the dormant season and sampled for the analysis of cellulose, hemicellulose, acid detergent lignin, macronutrients (N, P, K), ash content, density, and calorific value of wood. The analysed trees grew significantly more slowly under elevated humidity conditions, with a more pronounced effect on aspens. Significantly higher concentrations of N and P were observed in the stemwood of both aspens and birches grown under elevated humidity. This could be the result of a change in the content of living parenchyma cells and/or enhanced retranslocation of nutrients into wood parenchyma. Additionally, humidification resulted in a significantly higher concentration of cellulose and a lower concentration of hemicellulose in aspen stemwood, and in significantly lower concentrations of cellulose and K in birch stemwood. Elevated humidity did not affect lignin concentration, ash content, basic density and calorific value of stemwood. Results from the FAHM experiment suggest that the increasing air humidity accompanying global warming at northern latitudes will affect the growth and functioning of deciduous trees and forests, with obvious consequences also for forest management and industry.Betula pendulaPopulus tremulaP. tremuloides Forestry Sellin, Arne verfasserin aut Kupper, Priit verfasserin aut Lutter, Reimo verfasserin aut Pärn, Linnar verfasserin aut Jasinska, Anna verfasserin aut Alber, Meeli verfasserin aut Kukk, Maarja verfasserin aut Tullus, Tea verfasserin aut Tullus, Hardi verfasserin aut Lõhmus, Krista verfasserin aut Sõber, Anu verfasserin aut In Silva Fennica Finnish Society of Forest Science, 2019 48(2014), 4 (DE-627)320575039 (DE-600)2016943-7 22424075 nnns volume:48 year:2014 number:4 https://doi.org/10.14214/sf.1107 kostenfrei https://doaj.org/article/594802926518443884209fd9552bc68e kostenfrei https://www.silvafennica.fi/article/1107 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 48 2014 4 |
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Tullus, Arvo Sellin, Arne Kupper, Priit Lutter, Reimo Pärn, Linnar Jasinska, Anna Alber, Meeli Kukk, Maarja Tullus, Tea Tullus, Hardi Lõhmus, Krista Sõber, Anu |
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Increasing air humidity – a climate trend predicted for northern latitudes – alters the chemical composition of stemwood in silver birch and hybrid aspen |
abstract |
We studied the physicochemical properties of stemwood in saplings of silver birch ( Roth) and hybrid aspen ( L. Ã Michx.), grown for four years under artificially elevated relative air humidity (on average by 7%) in field conditions, using the Free Air Humidity Manipulation (FAHM) research facility in Estonia. Altogether 91 sample trees from three experimental plots with manipulated air humidity and from three control plots were cut in the dormant season and sampled for the analysis of cellulose, hemicellulose, acid detergent lignin, macronutrients (N, P, K), ash content, density, and calorific value of wood. The analysed trees grew significantly more slowly under elevated humidity conditions, with a more pronounced effect on aspens. Significantly higher concentrations of N and P were observed in the stemwood of both aspens and birches grown under elevated humidity. This could be the result of a change in the content of living parenchyma cells and/or enhanced retranslocation of nutrients into wood parenchyma. Additionally, humidification resulted in a significantly higher concentration of cellulose and a lower concentration of hemicellulose in aspen stemwood, and in significantly lower concentrations of cellulose and K in birch stemwood. Elevated humidity did not affect lignin concentration, ash content, basic density and calorific value of stemwood. Results from the FAHM experiment suggest that the increasing air humidity accompanying global warming at northern latitudes will affect the growth and functioning of deciduous trees and forests, with obvious consequences also for forest management and industry.Betula pendulaPopulus tremulaP. tremuloides |
abstractGer |
We studied the physicochemical properties of stemwood in saplings of silver birch ( Roth) and hybrid aspen ( L. Ã Michx.), grown for four years under artificially elevated relative air humidity (on average by 7%) in field conditions, using the Free Air Humidity Manipulation (FAHM) research facility in Estonia. Altogether 91 sample trees from three experimental plots with manipulated air humidity and from three control plots were cut in the dormant season and sampled for the analysis of cellulose, hemicellulose, acid detergent lignin, macronutrients (N, P, K), ash content, density, and calorific value of wood. The analysed trees grew significantly more slowly under elevated humidity conditions, with a more pronounced effect on aspens. Significantly higher concentrations of N and P were observed in the stemwood of both aspens and birches grown under elevated humidity. This could be the result of a change in the content of living parenchyma cells and/or enhanced retranslocation of nutrients into wood parenchyma. Additionally, humidification resulted in a significantly higher concentration of cellulose and a lower concentration of hemicellulose in aspen stemwood, and in significantly lower concentrations of cellulose and K in birch stemwood. Elevated humidity did not affect lignin concentration, ash content, basic density and calorific value of stemwood. Results from the FAHM experiment suggest that the increasing air humidity accompanying global warming at northern latitudes will affect the growth and functioning of deciduous trees and forests, with obvious consequences also for forest management and industry.Betula pendulaPopulus tremulaP. tremuloides |
abstract_unstemmed |
We studied the physicochemical properties of stemwood in saplings of silver birch ( Roth) and hybrid aspen ( L. Ã Michx.), grown for four years under artificially elevated relative air humidity (on average by 7%) in field conditions, using the Free Air Humidity Manipulation (FAHM) research facility in Estonia. Altogether 91 sample trees from three experimental plots with manipulated air humidity and from three control plots were cut in the dormant season and sampled for the analysis of cellulose, hemicellulose, acid detergent lignin, macronutrients (N, P, K), ash content, density, and calorific value of wood. The analysed trees grew significantly more slowly under elevated humidity conditions, with a more pronounced effect on aspens. Significantly higher concentrations of N and P were observed in the stemwood of both aspens and birches grown under elevated humidity. This could be the result of a change in the content of living parenchyma cells and/or enhanced retranslocation of nutrients into wood parenchyma. Additionally, humidification resulted in a significantly higher concentration of cellulose and a lower concentration of hemicellulose in aspen stemwood, and in significantly lower concentrations of cellulose and K in birch stemwood. Elevated humidity did not affect lignin concentration, ash content, basic density and calorific value of stemwood. Results from the FAHM experiment suggest that the increasing air humidity accompanying global warming at northern latitudes will affect the growth and functioning of deciduous trees and forests, with obvious consequences also for forest management and industry.Betula pendulaPopulus tremulaP. tremuloides |
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Increasing air humidity – a climate trend predicted for northern latitudes – alters the chemical composition of stemwood in silver birch and hybrid aspen |
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Additionally, humidification resulted in a significantly higher concentration of cellulose and a lower concentration of hemicellulose in aspen stemwood, and in significantly lower concentrations of cellulose and K in birch stemwood. Elevated humidity did not affect lignin concentration, ash content, basic density and calorific value of stemwood. 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