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Identifying agronomic practices with higher yield and lower global warming potential in rice paddies: a global meta-analysis

文献类型： 外文期刊

作者： Liao, Ping 1 ; Sun, Yanni 2 ; Zhu, Xiangcheng 3 ; Wang, Haiyuan 2 ; Wang, Yong 2 ; Chen, Jin 4 ; Zhang, Jun 5 ; Zeng, Yan 1 ;

作者机构： 1.Yangzhou Univ, Jiangsu Coinnovat Ctr Modem Prod Technol Grain Cr, Jiangsu Natl Key Lab Crop Genet & Physiol, Nurturing Ctr,Res Inst Rice Ind Engn Technol, Yangzhou 225009, Jiangsu, Peoples R China

2.Jiangxi Agr Univ, Minist Educ, Key Lab Crop Physiol Ecol & Genet Breeding, Nanchang 330045, Jiangxi, Peoples R China

3.Yichun Univ, Coll Life Sci & Resource Environm, Dept Agron, Yichun 336000, Peoples R China

4.Jiangxi Acad Agr Sci, Soil & Fertilizer & Resources & Environm Inst, Nanchang 330200, Jiangxi, Peoples R China

5.Chinese Acad Agr Sci, Inst Crop Sci, Beijing 100081, Peoples R China

关键词： Methane; Nitrous oxide; Greenhouse gas; Food security; Soil acidification

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

ISSN： 0167-8809

年卷期： 2021 年 322 卷

页码：

收录情况： SCI

摘要： Rice agriculture faces the dual challenge of increasing grain production while reducing global warming potential (GWP). Yield-scaled GWP, a commonly employed indicator, is not sufficient to identify smart agronomic practices that can address this dual challenge. Thus, practices that can increase yield while simultaneously reducing GWP in rice paddies have not yet been clearly defined. In this study, we synthesised independent experiments by meta-analyses to identify agronomic management practices with higher rice yield and lower GWP. The results showed that the application of nitrification inhibitors (NI) and biochar significantly increased rice yield by an average of 9.5% and 9.1%, and simultaneously reduced GWP by 24% and 14%, respectively. Overall, controlledrelease nitrogen (N) fertilisers did not affect GWP despite increasing rice yield (+9.2%). In contrast, conventional N application enhanced both rice yield (+44%) and GWP (+27%). No-tillage reduced GWP (-23%) but did not significantly affect rice yield. Non-continuous flooding in rice paddies significantly reduced GWP (-48%) but also reduced the yield (-4.2%). The rice yield and GWP outcomes were similar for rice-animal co-culture and rice monoculture systems. In conclusion, both NI and biochar application are promising practices for increasing yield while simultaneously reducing GWP in rice paddies. In addition, we suggest that individual agronomic practices should be combined to increase rice yield while mitigating climate warming.

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