中国稻米2026，Vol.32Issue(5)：54-60,7.DOI:10.3969/j.issn.1006-8082.2026.05.010
秸秆还田下外源物料添加对川南冬闲稻田秸秆腐解及温室气体排放的影响
Effects of Exogenous Amendments Addition on Straw Decomposition and Greenhouse Gas Emissions in Winter-Fallow Paddy Fields in Southern Sichuan Under Straw Return
摘要
Abstract
To investigate the effects of adding different exogenous amendments on straw decomposition and greenhouse gas(GHG)emissions in winter-fallow paddy fields under straw returning in the southern Sichuan,a field experiment was conducted in Yibin City,Sichuan Province.Four treatments were set up:straw returning(CK,A0N0);straw returning+nitrogen fertilizer(A0N1);straw returning+microbial agent(A1N0);straw return+microbial agent+nitrogen fertilizer(A1N1).A split-plot experimental design was adopted to systematically measure straw decomposition rates and emission fluxes of methane(CH4),nitrous oxide(N2O),and carbon dioxide(CO2).Results showed that the decomposition rate of CK during the winter-fallow period was significantly lower than that of treatments with combined application of microbial agent and N fertilizer.Among all treatments,the single application of microbial agent achieved the highest decomposition rate in the early stage,reaching 65.08%.Compared with CK,both microbial agent and N fertilizer applications increased the straw decomposition rate,although the rate decreased in the later decomposition stage.The GHG emission fluxes across all treatments exhibited a"U-shaped"dynamic pattern during the winter-fallow period(high in the early stage,low in the middle,and rebounding in the late stage).N fertilizer application significantly enhanced CH4 emissions in the early stage of straw return,while the combined application of microbial agent and N fertilizer reduced CO2 emissions by 59.81%.N2O emissions remained at relatively low levels throughout the winter-fallow period.In terms of global warming potential(GWP),the treatment with sole N fertilizer application had the highest GWP(3,082.50 kg/hm2),whereas the treatment with combined microbial agent and N fertilizer had the lowest GWP(1,924.80 kg/hm2).CO2 contributed most to the total GWP,accounting for 56.65%-75.20%across all treatments.In conclusion,applying a combination of decomposing microbial agent and N fertilizer during straw return in winter-fallow paddy fields of southern Sichuan can not only accelerate straw decomposition but also significantly reduce the overall GHG warming potential,providing important scientific evidence and technical support for green production and improved field management of regional winter-fallow paddy systems.关键词
稻田/秸秆还田/菌剂/氮肥/温室气体/冬闲期Key words
paddy field/straw return/microbial agent/nitrogen fertilizer/greenhouse gases/winter-fallow period分类
农业科技引用本文复制引用
胡建,伍燕翔,徐麟,陈琨,罗兴,周丽,马健华,乔娅,郭松,周子军,杨兆国,何刚..秸秆还田下外源物料添加对川南冬闲稻田秸秆腐解及温室气体排放的影响[J].中国稻米,2026,32(5):54-60,7.基金项目
四川省财政自主创新专项(2022ZZCX011) （2022ZZCX011）
宜宾市农业科技创新项目(2024NYHZ004) （2024NYHZ004）
国家重点研发计划项目(2023YFD2301901) （2023YFD2301901）
吨粮田(耕地)核心技术攻关[2025(1+3)ZYGG-04-2] （耕地）
