环境科学
温室气体
护根物
灌溉
缺水
用水效率
农业
旱地农业
农学
农林复合经营
地理
生态学
生物
考古
作者
Haihe Gao,Liu Q,Daozhi Gong,Hongjin Liu,Lijun Luo,Jixiao Cui,Qingfang He,Fen Ma,Wei He,Karen Mancl,Changrong Yan,Xurong Mei
标识
DOI:10.1016/j.resconrec.2023.107071
摘要
Global resource shortage and climate change are the grandest challenges facing traditional flooded rice cultivation. In this study, different rice production patterns were examined to quantify the effects on crop production, greenhouse gas (GHG) emissions, and synchronization index of water conservation and GHG mitigation. The results indicated that rice direct dryland seeding with biodegradable mulching showed the best performance in maintaining yield (7,802 kg ha−1), saving irrigation water (67%), increasing net profit (619 CNY ha−1), reducing CH4 emissions (73%), global warming potential (69%) and GHG intensity (69%), although it increased N2O emissions (59%), compared with continuous flooding. Rice direct dryland seeding without mulching showed similar water savings and GHG mitigation with mulching, but it caused yield and net profit reductions by 20% and 40%, and synchronization index increment by 127%. These findings can guide the implementation of dryland rice production in priority areas, contributing to high-efficiency, eco-friendly agricultural cultivation.
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