Greenhouse gas emissions, soil quality, and crop productivity from a mono-rice cultivation system as influenced by fallow season straw management

文献类型： 外文期刊

第一作者： Liu, Wei

作者： Liu, Wei;Hussain, Saddam;Wu, Lishu;Qin, Ziguo;Li, Xiaokun;Lu, Jianwei;Khan, Fahad;Geng, Mingjian;Cao, Weidong

作者机构：

关键词： Global warming potential;Greenhouse gas emissions;Rice productivity;Soil organic carbon;Straw management;Winter fallow

期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：4.223； 五年影响因子：4.306 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Straw management during fallow season may influence crop productivity, soil quality, and greenhouse gas (GHG) emissions from rice field. A 3-year field experiment was carried out in central China to examine the influence of different fallow season straw management practices on rice yield, soil properties, and emissions of methane (CH4) and nitrous oxide (N2O) from a mono-rice cultivation system. The treatments comprised an unfertilized control (CK), inorganic fertilization (NPK), rice straw burning in situ (NPK + RSB), rice straw mulching (NPK + RSM), and rice straw strip mulching with green manuring (NPK + RSM + GM). The maximum rice yield, soil organic carbon, soil total nitrogen, and available potassium were observed in NPK + RSM + GM treatment. Compared with NPK, the NPK + RSM + GM recorded 9 % higher grain yield averaged across 3 years. However, NPK + RSM and NPK + RSB were statistically similar with NPK regarding grain yield. The NPK + RSM and NPK + RSM + GM recorded significantly higher CH4 emission during rice growing season as well as winter fallow; however, the response of N2O emissions was variable. The NPK + RSM and NPK + RSM + GM were statistically similar for annual cumulative CH4 and N2O emissions. The NPK + RSM + GM recorded 103 and 72 % higher straw-induced net economic benefits and soil organic carbon sequestration rate, and reduced net global warming potential by 27 % as compared with NPK + RSM. Considering the benefits of soil fertility, higher crop productivity, and environmental safety, the NPK + RSM + GM could be the most feasible and sustainable option for mono-rice cultivation system in central China.

分类号： X5`X

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