Yield and nitrogen accumulation and partitioning in winter wheat under elevated CO2: A 3-year free-air CO2 enrichment experiment
文献类型: 外文期刊
第一作者: Han, Xue
作者: Han, Xue;Hao, Xingyu;Li, Yingchun;Ju, Hui;Lin, Erda;Hao, Xingyu;Lam, Shu Kee;Wang, Heran;Wheeler, Tim
作者机构:
关键词: Free-air Carbon dioxide enrichment (FACE);Nitrogen uptake;Nitrogen accumulation;Winter wheat
期刊名称:AGRICULTURE ECOSYSTEMS & ENVIRONMENT ( 影响因子:5.567; 五年影响因子:6.064 )
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年卷期:
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收录情况: SCI
摘要: Fossil fuel combustion and deforestation have resulted in a rapid increase in atmospheric [CO2] since the 1950's, and it will reach about 550 p,mol mol(-1) in 2050. Field experiments were conducted at the Free-air CO2 Enrichment facility in Beijing, China. Winter wheat was grown to maturity under elevated [CO2] (550 +/- 17 mu mol mol(-1)) and ambient [CO2] (415 +/- 16 mu mol mol(-1)), with high nitrogen (N) supply (FIN, 170 kg N ha(-1)) and low nitrogen supply (LN, 100 kg N ha(-1)) for three growing seasons from 2007 to 2010. Elevated [CO2] increased wheat grain yield by 11.4% across the three years. [CO2]-induced yield enhancements were 10.8% and 11.9% under low N and high N supply, respectively. Nitrogen accumulation under elevated [CO2] was increased by 12.9% and 9.2% at the half-way anthesis and ripening stage across three years, respectively. Winter wheat had higher nitrogen demand under elevated [CO2] than ambient [CO2], and grainyield had a stronger correlation with plant N uptake after anthesis than before anthesis at high [CO2]. Our results suggest that regulating on the N application rate and time, is likely important for sustainable grain production under future CO2 climate. (C) 2015 Elsevier B.V. All rights reserved.
分类号: S
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