土壤学报2011，Vol.48Issue(6)：1166-1172,7.
太湖地区不同集约化栽培模式下稻田CH4排放
METHANE EMISSION FROM RICE PADDY IN TAIHU LAKE REGION UNDER DIFFERENT CULTIVATION PATTERNS
摘要
Abstract
Methane fluxes from rice fields in the Taihu Lake Region were studied using static-chamber/gas chroma-tography. In-situ observation was carried out in paddy fields different in treatment or cultivation pattern, separately, I. E. Treatments NN (no N control) , FP (farmer's practice) , YE (10%-15% higher in yield and 20%-30% higher in N use efficiency) , HY (30%-40% higher in yield) , HE (30%-50% higher in N use efficiency) , and IE (currently integrated management for the same as FP in yield and 20% -30% higher in NUE). It was found that distinctive seasonal variation existed of methane emission from rice fields. Methane fluxes increased after transplanting peaking at the vegetative growth stage early or late depending on treatments and then declined rapidly after mid-season drainage. The cumulative methane emission observed during the period from transplanting to the heading stage accounted for 93% -98% of the seasonal total. Methane fluxes differed among different treatments. Treatment HY with organic manure emitted as high as 258. 8 kg hm-2 , obviously higher than Treatments NN, FP, YE, and IE without organic manure. However, CH4 emission per unit grain yield did not differ much among treatments, averaging CO2 0. 60 kg kg-1, which indicates that cultivation patterns with higher rice production would not substantially enhance CH4 emission. Treatment YE was the lowest in CH4 emission per unit grain yield, being CO2 0. 49 kg kg-1 , thus deserving wide extension due to increased grain yield, improved N use efficiency and decreased global warming potential simultaneously.关键词
栽培模式/CH4排放通量/氮肥利用率/产量/增温潜能Key words
Cultivation pattern/ CH4 flux/ N use efficiency/ Grain yield/ Global warming potential分类
资源环境引用本文复制引用
马煜春,孙丽英,孔宪旺,黄太庆,熊正琴..太湖地区不同集约化栽培模式下稻田CH4排放[J].土壤学报,2011,48(6):1166-1172,7.基金项目
国家重点基础研究发展计划(973)项目(2009CB118603)、教育部新世纪人才支持计划(NCET-10-0475)、南京市科技发展计划项目(200901063)、国家自然科学基金项目(40971139)资助 （973）
