The effect of increased atmospheric carbon dioxide concentration on emissions of nitrous oxide, carbon dioxide and methane from a wheat field in a semi-arid environment in northern China

文献类型： 外文期刊

第一作者： Lam, Shu Kee

作者： Lam, Shu Kee;Norton, Rob;Chen, Deli;Lin, Erda;Norton, Rob

作者机构：

关键词： Carbon dioxide;Crops;Emission measurements;Carbon dioxide;Crops;Emission measurements;Emissions;Greenhouse gases;Methane;Semiarid environments;Soil;wheat;Triticum aestivum;China;People's Rep.

期刊名称：SOIL BIOLOGY & BIOCHEMISTRY （ 影响因子：7.609； 五年影响因子：8.312 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： There are no reports on the effects of elevated carbon dioxide [CO sub(2)] on the fluxes of N sub(2)O, CO sub(2) and CH sub(4) from semi-arid wheat cropping systems. These three soil gas fluxes were measured using closed chambers under ambient (420 +/- 18 mu mol mol super(-1)) and elevated (565 +/- 37 mu mol mol super(-1)) at the Free-Air Carbon dioxide Enrichment experimental facility in northern China. Measurements were made over five weeks on a wheat crop (Triticum aestivum L. cv. Zhongmai 175). Elevated [CO sub(2)] increased N sub(2)O and CO sub(2) emission from soil by 60% and 15%, respectively, but had no significant effect on CH sub(4) flux. There was no significant interaction between [CO sub(2)] and N application rate on these gas fluxes, probably because soil N was not limiting. At least 22% increase in C storage is required to offset the observed increase in greenhouse gas emissions under elevated [CO sub(2)].

分类号： S1

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