Mitigation of greenhouse gas emissions and improved yield by plastic mulching in rice production

文献类型： 外文期刊

第一作者： Gao, Haihe

作者： Gao, Haihe;Liu, Qin;Yan, Changrong;Gong, Daozhi;He, Wenqing;Wu, Qiu;Liu, Hongjin;Wang, Jinling;Wang, Jinling;Mei, Xurong

作者机构：

关键词： Plastic mulching; Straw mulching; Greenhouse gas emissions; Food security; Water use eff iciency

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：9.8； 五年影响因子：9.6 ）

ISSN： 0048-9697

年卷期： 2023 年 880 卷

页码：

收录情况： SCI

摘要： Soil mulching technologies are effective practices which alleviate non-point source pollution and carbon emissions, while ensuring grain production security and increasing water productivity. However, the lack of comprehensive un-derstanding of the impacts of mulching technologies on rice fields has hindered progress in global implementation due to the varying environments and application conditions under which they are implemented. This study conducted a meta-analysis based on 2412 groups of field experiment data from 313 studies to evaluate the effects of soil mulching methods on rice production, greenhouse gas (GHG) emissions and water use efficiency. The results show that plastic mulching, straw mulching and no mulching (PM, SM and NM) have reduced CH4 emissions (68.8 %, 61.4 % and 57.2 %), increased N2O emissions (84.8 %, 89.1 % and 96.6 %), reduced global warming potentials (50.7 %, 47.5 % and 46.8 %) and improved water use efficiency (50.2 %, 40.9 % and 34.0 %) compared with continuous flooding irrigation. However, PM increased rice yield (1.6 %), while SM and NM decreased yield (4.3 % and 9.2 %). Furthermore, analysis using random forest models revealed that rice yield, GHG emissions and WUE response to soil mulching were related to climate, soil properties, fertilizer and rice varieties. Our findings can guide the implementa-tion of plastic mulching technology in priority areas, contribute to agricultural carbon neutrality and support the development of practical guidelines for farmers.

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