Effects of free-air CO2 enrichment (FACE) on the uptake and utilization of N, P and K in Vigna radiata

文献类型： 外文期刊

第一作者： Li, Ping

作者： Li, Ping;Zong, Yuzheng;Li, Hongying;Han, Yuanhuai;Hao, Xingyu;Li, Ping;Han, Xue;Lin, Erda;Hao, Xingyu;Li, Ping;Han, Yuanhuai

作者机构：

关键词： Free-air carbon dioxide enrichment (FACE);Elevated [CO2];Biomass;NPK nutrient uptake;Utilization of NPK;Mung bean

期刊名称：AGRICULTURE ECOSYSTEMS & ENVIRONMENT （ 影响因子：5.567； 五年影响因子：6.064 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： Elevated [CO2] stimulates plant growth, which in turn demands more nutrients to sustain it. The nutrient demand of N-fixing plants may differ from that of other plants under elevated [CO2]. We conducted an experiment to determine how elevated [CO2] affected N, P and K content, assimilation of nutrients and accumulation of metabolites in the legume mung bean [Vigna radiata L.]. We investigated the effect of 550 +/- 19 mu mol mol(-1) [CO2] on N, P, K uptake and utilization by mung bean at the free-air carbon dioxide enrichment (FACE) experimental facility in north China. At maturity, N concentration in whole plants decreased by 4.4%, but P and K concentration was unchanged at elevated [CO2]. The weight of nodules per plant significantly increased at elevated [CO2] but N, P, K-use efficiency for seed and the ratio of seed yield to cumulative absorption of N, P and K was unaffected. These results indicate that under elevated [CO2] the mechanisms governing N absorption and metabolism in mung bean was different from that for P and K. The nutrient dynamics between different elements of overall plant biomass and the soil nutrients pool could, therefore, be changed in future by elevated [CO2]. (C) 2015 Elsevier B.V. All rights reserved.

分类号： S

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