Impacts of cropping practices on yield-scaled greenhouse gas emissions from rice fields in China: A meta-analysis

doi:10.1016/j.agee.2012.10.009

	Impacts of cropping practices on yield-scaled greenhouse gas emissions from rice fields in China: A meta-analysis
	Feng, Jinfei 1,2; Chen, Changqing 1; Zhang, Yi 1; Song, Zhenwei 2; Deng, Aixing 2; Zheng, Chengyan 2; Zhang, Weijian 1,2
刊名	AGRICULTURE ECOSYSTEMS & ENVIRONMENT
	2013
卷号	164 页码:220-228
关键词	Food security Global warming CH4 N2O Rice cropping
ISSN号	0167-8809
DOI	10.1016/j.agee.2012.10.009
通讯作者	Feng, Jinfei
英文摘要	Recently increasing studies suggest that a comprehensive assessment of cropping practices impacts on greenhouse gas (GHG) emissions at yield-scale will benefit cropping technique innovation and policy selection for higher-yield with less-emissions. In this paper, we conducted a meta-analysis to quantify the impacts of rice cropping practices on the global warming potential (GWP) of GHG emissions at yield-scale rather than area-scale in China. The results showed that the yield-scaled GWP of Chinese major rice cropping systems during rice growing season was in the order: double rice cropping system (1188.9 kg CO2 equiv.Mg-1) > rice-upland crop rotation system (777.0 kg CO2 equiv.Mg-1) > single rice cropping system (346.7 kg CO2 equiv.Mg-1). Nitrogen fertilization (50-300 kg N ha(-1)) significantly increased rice yield with slight increments in the GWP of CH4 and N2O emissions, resulting in significant reductions in the yield-scaled GWP. The greatest reduction occurred at the application rate of 150-200 kg N ha(-1) by 37% as compared to the non-fertilization control. For organic amendments, biogas residue application had no significant effect on the yield-scaled GWP, while manure application and straw recycling significantly increased the yield-scaled GWP by 54% and 154%, respectively. Intermittent irrigation significantly reduced yield-scaled GWP by 59% largely because of a significant reduction in CH4 emission and a significant increment in rice yield. No-tillage showed lower CH4 emission with similar rice yield in comparison with the conventional tillage, resulting in a reduction in yield-scaled GWP by 20%. These results indicate that there is a great potential to meet the new objective of higher-yield with less-GHG emissions through innovating rice cropping technique. More efforts should be paid on the field observations of GHG emissions during non-rice growing season, so as to perform a life-cycling assessment of GHG emissions from rice fields at yield scale under different cropping systems. (C) 2012 Elsevier B.V. All rights reserved.
学科主题	Agriculture, Multidisciplinary ; Ecology ; Environmental Sciences ; AGRICULTURE, MULTIDISCIPLINARY ; ECOLOGY ; ENVIRONMENTAL SCIENCES
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000315473000022
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/5100]
专题	作物科学研究所_栽培生理学系
作者单位	1.Nanjing Agr Univ, Inst Appl Ecol, Nanjing 210095, Jiangsu, Peoples R China 2.Chinese Acad Agr Sci, Inst Crop Sci, Key Lab Crop Physiol & Ecol, Minist Agr, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Feng, Jinfei,Chen, Changqing,Zhang, Yi,et al. Impacts of cropping practices on yield-scaled greenhouse gas emissions from rice fields in China: A meta-analysis[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2013,164:220-228.
APA	Feng, Jinfei.,Chen, Changqing.,Zhang, Yi.,Song, Zhenwei.,Deng, Aixing.,...&Zhang, Weijian.(2013).Impacts of cropping practices on yield-scaled greenhouse gas emissions from rice fields in China: A meta-analysis.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,164,220-228.
MLA	Feng, Jinfei,et al."Impacts of cropping practices on yield-scaled greenhouse gas emissions from rice fields in China: A meta-analysis".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 164(2013):220-228.