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	Effects of organic matter incorporation on nitrous oxide emissions from rice-wheat rotation ecosystems in China
	Yao, Zhisheng1,2; Zhou, Zaixing1; Zheng, Xunhua1; Xie, Baohua1; Mei, Baoling1; Wang, Rui1; Butterbach-Bahl, Klaus2; Zhu, Jianguo3
刊名	PLANT AND SOIL
	2010-02-01
卷号	327期号:1-2页码:315-330
关键词	N fertilizer Nitrous oxide Rice-wheat rotation Wheat straw Compost Emission factor
ISSN号	0032-079X
DOI	10.1007/s11104-009-0056-4
通讯作者	Zheng, Xunhua(xunhua.zheng@post.iap.ac.cn)
英文摘要	Organic matter addition is thought to be an important regulator of nitrous oxide (N(2)O) emissions from croplands. Contradictory effects, however, were reported in previous studies. To investigate the effects of crop residue management on N(2)O emissions from rice-wheat rotation ecosystems, we conducted field experiments at three sites (Suzhou, Wuxi and Jiangdu) in the Yangtze River Delta, using static chamber and gas chromatography methods. Our data show that N(2)O emissions throughout the rice season from plots treated with wheat straw application at a high rate (WS) prior to rice transplanting (1.1-2.0 kg N ha(-1)) were significantly lower (P < 0.05) than those from the control plots without organic matter addition or added with wheat straw at a moderate rate (1.6-2.9 kg N ha(-1)). Furthermore, the WS treatments had a residual inhibitory effect on N(2)O emissions in the following non-rice season, which consistently resulted in significantly lower emissions (P < 0.05) compared to the control treatments (2.2-3.1 vs. 3.9-5.6 kg N ha(-1)). In comparison to the control treatments, the WS treatments reduced both the seasonal and annual direct emission factors of the applied nitrogen (EF(d)) by 50-68% (mean: 57%). The addition of compost (aerobically composted rice or wheat straw harvested in the last rotation) reduced the seasonal and annual EF(d)s by 29-32%. Over the entire rice-wheat rotation cycle, annual N(2)O emissions from the fertilized fields at the three sites ranged from 3.3 +/- 0.3 to 16.8 +/- 0.6 kg N ha(-1), with a coefficient of variation (CV) of 61%. Similarly, the EF(d)s during the rice-wheat rotation cycle ranged from 0.4% to 2.5%, with a CV of 67%. These high spatial variations might have been related to: variations in soil properties, such as texture and soil organic carbon; management practices, such as straw treatments (i.e., compost versus fresh straw) and weather conditions, such as precipitation and rainfall distribution. Our results indicate that the incorporation of fresh wheat straw at a high rate during the rice season is an effective management practice for the mitigation of N(2)O emissions in rice-wheat rotation systems. Whether this practice is also effective in reducing the overall global warming potential of net N(2)O, CH(4) and CO(2) emissions needs to be seen through further studies.
收录类别	SCI
WOS关键词	CROP RESIDUE ; N2O EMISSIONS ; FERTILIZER APPLICATION ; AGROFORESTRY RESIDUES ; LOWLAND SOIL ; RELEASE ; METHANE ; FLUXES ; MINERALIZATION ; NITRIFICATION
WOS研究方向	Agriculture ; Plant Sciences
WOS类目	Agronomy ; Plant Sciences ; Soil Science
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000273754800025
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2558814
专题	南京土壤研究所
通讯作者	Zheng, Xunhua
作者单位	1.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China 2.Karlsruhe Res Ctr, Inst Meteorol & Climate Res, D-82467 Garmisch Partenkirchen, Germany 3.Chinese Acad Sci, Nanjing Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 21008, Peoples R China
推荐引用方式 GB/T 7714	Yao, Zhisheng,Zhou, Zaixing,Zheng, Xunhua,et al. Effects of organic matter incorporation on nitrous oxide emissions from rice-wheat rotation ecosystems in China[J]. PLANT AND SOIL,2010,327(1-2):315-330.
APA	Yao, Zhisheng.,Zhou, Zaixing.,Zheng, Xunhua.,Xie, Baohua.,Mei, Baoling.,...&Zhu, Jianguo.(2010).Effects of organic matter incorporation on nitrous oxide emissions from rice-wheat rotation ecosystems in China.PLANT AND SOIL,327(1-2),315-330.
MLA	Yao, Zhisheng,et al."Effects of organic matter incorporation on nitrous oxide emissions from rice-wheat rotation ecosystems in China".PLANT AND SOIL 327.1-2(2010):315-330.

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