Modeling Interactions among Carbon Dioxide, Nitrogen, and Climate on Energy Exchange of Wheat in a Free Air Carbon Dioxide Experiment
Changes in mass and energy exchange by crops under rising atmospheric CO2 concentration (Ca) may be affected by N and weather; Ca interacts with weather on mass and energy exchange through limitations on latent heat flux imposed by stomatal conductance, which is affected by Ca, and aerodynamic condu...
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| Veröffentlicht in: | Agronomy journal 2001-05, Vol.93 (3), p.638-649 |
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| creator | Grant, Robert F. Kimball, Bruce A. Brooks, Talbot J. Wall, Gary W. Pinter, Paul J. Hunsaker, Doug J. Adamsen, Floyd J. Lamorte, Robert L. Leavitt, Steven W. Thompson, Thomas L. Matthias, Allan D. |
| description | Changes in mass and energy exchange by crops under rising atmospheric CO2 concentration (Ca) may be affected by N and weather; Ca interacts with weather on mass and energy exchange through limitations on latent heat flux imposed by stomatal conductance, which is affected by Ca, and aerodynamic conductance, which is affected by weather. We examined the bases for these interactions with the ecosystem model ecosys Simulation results were tested with energy flux data from a Free Air CO2 Enrichment (FACE) experiment in which wheat (Triticum aestivum L.) was grown under 548 vs. 363 μmol mol−1 Ca and fertilized with 7 vs. 35 g N m−2. Both model and experimental results indicated that raising Ca from 363 to 548 μmol mol−1 reduced midday latent heat fluxes by ca. 50 W m−2 for wheat fertilized with 35 g N m−2, and by ca. 100 W m−2 for wheat fertilized with only 7 g N m−2 when N deficits developed later in the growing season. These reductions were smaller under low wind speeds ( |
| doi_str_mv | 10.2134/agronj2001.933638x |
| format | Article |
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We examined the bases for these interactions with the ecosystem model ecosys Simulation results were tested with energy flux data from a Free Air CO2 Enrichment (FACE) experiment in which wheat (Triticum aestivum L.) was grown under 548 vs. 363 μmol mol−1 Ca and fertilized with 7 vs. 35 g N m−2. Both model and experimental results indicated that raising Ca from 363 to 548 μmol mol−1 reduced midday latent heat fluxes by ca. 50 W m−2 for wheat fertilized with 35 g N m−2, and by ca. 100 W m−2 for wheat fertilized with only 7 g N m−2 when N deficits developed later in the growing season. These reductions were smaller under low wind speeds (<5 km h−1) and stable boundary conditions when aerodynamic conductance became the dominant constraint to transpiration. At a seasonal time scale, raising Ca from 363 to 548 μmol mol−1 reduced simulated (measured) evapotranspiration of wheat by 9% (7%) when fertilized with 35 g N m−2, and by 16% (19%) with 7 g N m−2. Changes with Ca in mass and energy exchange used in climate change studies should therefore reflect the site‐specific availability of N, as well as climate attributes such as wind speed.</description><identifier>ISSN: 0002-1962</identifier><identifier>EISSN: 1435-0645</identifier><identifier>DOI: 10.2134/agronj2001.933638x</identifier><identifier>CODEN: AGJOAT</identifier><language>eng</language><publisher>Madison: American Society of Agronomy</publisher><subject>Agricultural and forest climatology and meteorology. Irrigation. Drainage ; Agricultural and forest meteorology ; Agronomy. Soil science and plant productions ; Biological and medical sciences ; Crop climate. Energy and radiation balances ; Fundamental and applied biological sciences. Psychology ; General agronomy. Plant production</subject><ispartof>Agronomy journal, 2001-05, Vol.93 (3), p.638-649</ispartof><rights>Published in Agron. 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We examined the bases for these interactions with the ecosystem model ecosys Simulation results were tested with energy flux data from a Free Air CO2 Enrichment (FACE) experiment in which wheat (Triticum aestivum L.) was grown under 548 vs. 363 μmol mol−1 Ca and fertilized with 7 vs. 35 g N m−2. Both model and experimental results indicated that raising Ca from 363 to 548 μmol mol−1 reduced midday latent heat fluxes by ca. 50 W m−2 for wheat fertilized with 35 g N m−2, and by ca. 100 W m−2 for wheat fertilized with only 7 g N m−2 when N deficits developed later in the growing season. These reductions were smaller under low wind speeds (<5 km h−1) and stable boundary conditions when aerodynamic conductance became the dominant constraint to transpiration. At a seasonal time scale, raising Ca from 363 to 548 μmol mol−1 reduced simulated (measured) evapotranspiration of wheat by 9% (7%) when fertilized with 35 g N m−2, and by 16% (19%) with 7 g N m−2. Changes with Ca in mass and energy exchange used in climate change studies should therefore reflect the site‐specific availability of N, as well as climate attributes such as wind speed.</description><subject>Agricultural and forest climatology and meteorology. Irrigation. Drainage</subject><subject>Agricultural and forest meteorology</subject><subject>Agronomy. Soil science and plant productions</subject><subject>Biological and medical sciences</subject><subject>Crop climate. Energy and radiation balances</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>General agronomy. 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Irrigation. Drainage</topic><topic>Agricultural and forest meteorology</topic><topic>Agronomy. Soil science and plant productions</topic><topic>Biological and medical sciences</topic><topic>Crop climate. Energy and radiation balances</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>General agronomy. Plant production</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Grant, Robert F.</creatorcontrib><creatorcontrib>Kimball, Bruce A.</creatorcontrib><creatorcontrib>Brooks, Talbot J.</creatorcontrib><creatorcontrib>Wall, Gary W.</creatorcontrib><creatorcontrib>Pinter, Paul J.</creatorcontrib><creatorcontrib>Hunsaker, Doug J.</creatorcontrib><creatorcontrib>Adamsen, Floyd J.</creatorcontrib><creatorcontrib>Lamorte, Robert L.</creatorcontrib><creatorcontrib>Leavitt, Steven W.</creatorcontrib><creatorcontrib>Thompson, Thomas L.</creatorcontrib><creatorcontrib>Matthias, Allan D.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Agronomy journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Grant, Robert F.</au><au>Kimball, Bruce A.</au><au>Brooks, Talbot J.</au><au>Wall, Gary W.</au><au>Pinter, Paul J.</au><au>Hunsaker, Doug J.</au><au>Adamsen, Floyd J.</au><au>Lamorte, Robert L.</au><au>Leavitt, Steven W.</au><au>Thompson, Thomas L.</au><au>Matthias, Allan D.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Modeling Interactions among Carbon Dioxide, Nitrogen, and Climate on Energy Exchange of Wheat in a Free Air Carbon Dioxide Experiment</atitle><jtitle>Agronomy journal</jtitle><date>2001-05</date><risdate>2001</risdate><volume>93</volume><issue>3</issue><spage>638</spage><epage>649</epage><pages>638-649</pages><issn>0002-1962</issn><eissn>1435-0645</eissn><coden>AGJOAT</coden><abstract>Changes in mass and energy exchange by crops under rising atmospheric CO2 concentration (Ca) may be affected by N and weather; Ca interacts with weather on mass and energy exchange through limitations on latent heat flux imposed by stomatal conductance, which is affected by Ca, and aerodynamic conductance, which is affected by weather. We examined the bases for these interactions with the ecosystem model ecosys Simulation results were tested with energy flux data from a Free Air CO2 Enrichment (FACE) experiment in which wheat (Triticum aestivum L.) was grown under 548 vs. 363 μmol mol−1 Ca and fertilized with 7 vs. 35 g N m−2. Both model and experimental results indicated that raising Ca from 363 to 548 μmol mol−1 reduced midday latent heat fluxes by ca. 50 W m−2 for wheat fertilized with 35 g N m−2, and by ca. 100 W m−2 for wheat fertilized with only 7 g N m−2 when N deficits developed later in the growing season. These reductions were smaller under low wind speeds (<5 km h−1) and stable boundary conditions when aerodynamic conductance became the dominant constraint to transpiration. At a seasonal time scale, raising Ca from 363 to 548 μmol mol−1 reduced simulated (measured) evapotranspiration of wheat by 9% (7%) when fertilized with 35 g N m−2, and by 16% (19%) with 7 g N m−2. Changes with Ca in mass and energy exchange used in climate change studies should therefore reflect the site‐specific availability of N, as well as climate attributes such as wind speed.</abstract><cop>Madison</cop><pub>American Society of Agronomy</pub><doi>10.2134/agronj2001.933638x</doi><tpages>12</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Agricultural and forest climatology and meteorology. Irrigation. Drainage Agricultural and forest meteorology Agronomy. Soil science and plant productions Biological and medical sciences Crop climate. Energy and radiation balances Fundamental and applied biological sciences. Psychology General agronomy. Plant production |
| title | Modeling Interactions among Carbon Dioxide, Nitrogen, and Climate on Energy Exchange of Wheat in a Free Air Carbon Dioxide Experiment |
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