基于沼气工程的稻田甲烷排放减半策略  

Strategy for Halving Methane Emissions from Paddy Fields Based on Biogas Project

作　　者：晏珍梅 孙辉 郭建斌[1] 鞠鑫鑫 董仁杰[1] YAN Zhenmei;SUN Hui;GUO Jianbin;JU Xinxin;DONG Renjie(National Center for International Research of BioEnergy Science and Technology(iBEST),MoA Key Lab of Clean Production and Utilization of Renewable Energy(CPURE),Carbon-Neutral Agriculture Research Center of CAU College of Engineering(CNA),Beijing 100083,China;Shandong Zhongnong March Environmental Protection Technology Co Ltd,Yantai 264006,China)

机构地区：[1]国家级生物质能科学与技术国际联合研究中心,农业农村部可再生能源清洁化利用技术重点实验室,中国农业大学工学院农业农村碳中和研究中心,北京100083 [2]山东中农三月环保科技股份有限公司,山东烟台264006

出　　处：《中国沼气》2022年第3期3-8,共6页China Biogas

基　　金：国家自然科学基金联合基金(U20A2086)。

摘　　要：我国水稻种植每年产生近两亿t二氧化碳当量的稻田甲烷排放。针对稻秸直接还田、稻秸离田进入沼气工程厌氧消化去除产甲烷潜力后沼渣还田(简称“稻秸沼渣还田”)以及稻秸沼渣还田耦合稻田水分管理等3种情景,核算了稻田甲烷减排潜力。结果表明,与稻秸直接还田相比,稻秸沼渣还田不减少稻秸还田对稻田有机质和养分的贡献,但可减少我国南方一年多熟稻田甲烷排放40%以上,可减少北方一年一熟稻田甲烷排放15%以上。稻秸沼渣还田与稻田水分管理耦合,有望在未来实现全国范围内稻田甲烷减半目标。Rice production generates nearly 200 million tons of CO_(2)e methane emissions each year in China.The methane emission and mitigation potential of rice production were analyzed under three scenarios:rice straw direct return to the field,rice straw treated in the biogas plant and digestate return to the field(rice straw digestate return to the field),and coupling of rice straw digestate return to the field and rice field water management.Compared with the rice straw direct return to the field,the rice straw digestate return to the field keeps the final organic matter and nutrients for the soil,and can reduce the methane emission from rice production by more than 40%and 15%in southern and northern China respectively.The coupling of rice straw digestate return to the field and rice field water management will realize half reduction of methane emission for the overall China in the future.

关 键 词：稻田 甲烷 沼气工程 减排 

分 类 号：Q152[生物学—普通生物学] S216.4[农业科学—农业机械化工程] X705[农业科学—农业工程]