[N2O emission factor for agricultural soils].
Based on the direct measurements of annual N2O emission from 207 field experiments reported in literatures between 1982 and 2003, this paper established a database of annual N2O emission from agricultural fields. Correlation analysis indicated that the N2O emission from agricultural soils was significantly correlated with climatic factors temperature and precipitation, while no significant correlations were observed between N2O emission and edaphic parameters pH, organic carbon and nitrogen. According to the definition of N2O-N emission factor and its quantification by the Intergovernmental Panel on Climate Change, the N2O-N emission factor was modified by annual mean temperature and annual precipitation, respectively. The results suggested that the modification with precipitation might significantly reduce the estimated error of N2O emission by about 16%, while that with temperature did not reduce the error, in comparison with the default emission factor by the Intergovernmental Panel on Climate Change.
Lu
Yanyu
Y
College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China. lu7777@njau.edu.cn
Huang
Yao
Y
Zheng
Xunhua
X
D018556:Crops, Agricultural / Q000254:growth & development*; D004784:Environmental Monitoring; D009609:Nitrous Oxide / Q000032:analysis*; D012987:Soil / Q000032:analysis*
D012987:Soil; D009609:Nitrous Oxide