农业环境科学学报2012，Vol.31Issue(1)：212-218,7.
中国稻田水稻生长季N2O排放估算
Estimation of N2O Emissions from Paddy Fields During Rice Growing Season in China
摘要
Abstract
Based on a multivariate statistical model, N2O emission from paddy fields during rice growing season in China was estimated, by considering the variability of influencing factors using Monte-Carlo simulation. The results showed that N2O fluxes from 378 rice paddy sites during rice-growing season ranged from 6.0 to 74.3 μg N m-2·h-1, and the mean of the simulated fluxes was close to that of the observed ones. There was a large spatial heterogeneity in the simulated emissions, with higher emissions occurring between 20° N and 30°N. For single rice, rice-upland crop, double rice cropping system, N2O emissions during rice-growing season accounted for 53%, 34%, and 59% of their annual emissions, respectively. Monte-Carlo simulation showed that N2O emissions from paddy fields during rice growing season in China was 24.48 Gg N in 2008, with a 95% uncertainty range of 20.5～24.8 Gg N. The fertilizer-induced N2O emission factor was 0.27%, which was close to default IPCC value of 0.3%. The Monte-Carlo simulation also showed that water management, the type of organic N, the amount of chemical fertilizer N, and soil properties significantly affected the simulated N2O emissions.关键词
中国稻田/N2O排放/估算/不确定分析Key words
rice paddies in China/N2O emission/estimation/uncertainty analysis分类
资源环境引用本文复制引用
廖千家骅,王书伟,颜晓元..中国稻田水稻生长季N2O排放估算[J].农业环境科学学报,2012,31(1):212-218,7.基金项目
中国科学院知识创新工程重要方向项目(KZCX2-YW-Q1-07) （KZCX2-YW-Q1-07）
中国科学院知识创新项目(No.40621001) （No.40621001）
