【摘要】 利用IKONOS高分辨率(1 m)卫星遥感图,运用典型抽样和地形※土地利用※土地覆盖※综合信息提取的方法,选定了川中丘陵区代表区域,通过对研究区域农业生产情况、土样、水样和气象资料的调查和分析,利用DNDC模型模拟农户作物生产条件下稻田CO2、CH4和N2O排放情况,在此基础上,通过改变目前的研究区域冬水田(PF)(PF占研究区域面积的58.07%)生产条件中的某一影响因子,进一步研究这一因子的改变对CO2、CH4和N2O排放的影响及全球增温潜势(GWP)变化情况。结果表明:氮肥种类和数量、有机肥种类和动物粪尿投入数量、晒田和不晒田、耕地深度、年平均气温变化、降雨量变化、土壤pH值变化、土壤有机质含量变化、土壤质地变化均对稻田温室气体排放有较为显著的影响。冬水田(PF)、水稻-油菜田(RR)和水稻-小麦田(RW)全年排放CO2、CH4和N2O的综合GWP:RW>RR>PF。更多还原

【Abstract】 Using the high resolution(1 m)IKONOS satellite and employing typical sampling and terrain※land use※land cover※ comprehensive information extractionmethod, representative of the middle Jintang hilly area feature were selected. Detailed farmer investigationswere carried out, including crop diversity, tillage, fertilizer,manure type, irrigationsoil pH,meteorological data.Emissions of CO2,N2O and CH4 emissions of rice fieldswith farmers crop production conditions simulated using DNDC model. In-depth analysis of factors contributing to emissions of CO2,N2O,CH4, and global warming potential(GWP)was performed by changing a factor of production conditions of the winter water paddy rice field(winterpaddy field area accounts for 58.07% of the area of research)in the target area.The results showthat nitrogen fertilizer, organic fertilizer number and variety types, animal dung urine into quantity, middle-stage drainage,depth of cultivated fields,average temperature,rainfall,soil pH,contentof soil organic matter,soil texture have significantinfluence ongreenhouse gas emissions in paddy field.GWPofCO2,CH4,andN2O emissionsof one yearfromthree kinds of paddy field-permanently flooded paddy fields(PF), rapeseed-paddy rice fields(RR)and winter wheat-paddy rice fields(RW)were in the order of RW> RR> PF.更多还原