摘要
有机肥施用和土壤水分管理是影响稻田CH4排放最重要的2个因素。本文通过室内培养和田间试验研究了冬季秸秆还田对冬灌田水稻生长期CH4的产生、氧化和排放的影响。结果表明:淹水混施处理CH4产生潜力在水稻移栽后35和51天显著大于淹水不施肥处理(p<0.05),其余时间则无显著差异(p>0.05);冬季秸秆还田对CH4氧化潜力无显著影响(p>0.05),水稻生长期土温和稻田施用氮肥可能是较其更重要的影响因素;淹水混施处理CH4平均排放通量(CH426.7mg/(m2·h))显著大于淹水不施处理(CH420.3mg/(m2·h))(p<0.05)。
Both organic fertilizer application and water management are the most important factors that affect CH4 emission from rice field.Incubation and field experiment were carried out to study the effects of rice straw application in winter on CH4 production,oxidation,and emission from continuously-flooded rice field during the rice-growing season.Results showed that significant difference was observed between the Treatments flooded with and without rice straw incorporation（FS and CK） in CH4 production potential after rice transplanting 35 and 51 days（p0.05）,while no significant difference was observed in the rest of rice period（p0.05）.The soil temperature and N-fertilizer application were the more important influencing factors than rice straw application in winter which did not significantly affect CH4 oxidation potential during the rice growth season（p0.05）.Compared with the treatment CK（CH4 20.3 mg/（m2·h）） in the mean CH4 flux,the treatment FS（CH4 26.7 mg/（m2·h）） was significantly higher（p0.05）.
出处
《土壤》
CAS
CSCD
北大核心
2010年第6期895-900,共6页
Soils
基金
科技部科技支撑计划项目(2007BAD89B18)
国际科技合作项目(2008DFA21330)
中国科学院重大创新项目(KSCX1-YW-09-08)资助
关键词
CH4产生潜力
CH4氧化潜力
CH4排放通量
秸秆还田
冬灌田
CH4 production potential
CH4 oxidation potential
CH4 flux
Rice straw incorporation
Permanently flooded rice field
