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Position: Home > Articles > N_2O emission factor for agricultural soils. Chinese Journal of Applied Ecology 2005,16 (7) 1299-1302

农田氧化亚氮排放系数的研究

作  者：
卢燕宇;黄耀;郑循华
单  位：
中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室;南京农业大学资源与环境科学学院
关键词：
NO;排放系数;农田;降水
摘  要：
通过调研多年来国内外农田N2O排放的研究结果,建立了农田N2O年度排放数据库,并分析了N2O排放与各环境因子之间的关系.相关分析表明,N2O排放与温度及降水呈显著正相关,与土壤pH值、有机碳及氮含量无显著相关.依据政府间气候变化专门委员会对农田N2O排放系数的定义和确定方法,用年平均气温及降水量对其进行修正.结果表明,经平均气温修正后的排放系数并不减小农田N2O排放的估计误差,但用年降水量进行修正后能减小平均相对误差16%左右.
译  名：
N_2O emission factor for agricultural soils.
作  者：
LU Yanyu~1,HUANG Yao~(1,2),ZHENG Xunhua~2 (()~1College of Resources and Environmental Sciences,Nanjing Agricultural University,Nanjing 210095,China;()~2LAPC,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China).
关键词：
N_2O, Emission factor, Agricultural field, Precipitation.
摘  要：
Based on the direct measurements of annual N_2O emission from 207 field experiments reported in literatures between 1982 and 2003,this paper established a database of annual N_2O emission from agricultural fields.Correlation analysis indicated that the N_2O emission from agricultural soils was significantly correlated with climatic factors temperature and precipitation,while no significant correlations were observed between N_2O emission and edaphic parameters pH,organic carbon and nitrogen.According to the definition of N_2O-N emission factor and its quantification by the Intergovernmental Panel on Climate Change,the N_2O-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 N_2O 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.

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