农业生产中氧化亚氮排放源的影响因素分析

Analysis of the Influencing Factors Related to Nitrous Oxide Emission in Agricultural Production

农业是温室气体氧化亚氮(N2O)的主要排放源。基于1990至2008年的统计数据,运用多元线性回归模型,分析了化肥施用量、水稻种植面积、灌溉面积和猪的饲养量对农业源N2O排放的影响。结果表明,化肥施用量、水稻种植面积、有效灌溉面积和猪的饲养量都对氧化亚氮的排放有正相关影响,其中有效灌溉面积对氧化亚氮排放的影响最大,占据了主导地位。建议在逐步改变耕作方式的过程中,通过不断提高农业灌溉技术、合理施肥、科学处理动物废弃物等手段来促进我国农业生产方式的转变,减少农业生产过程氧化亚氮的排放量,为我国发展低碳农业创造较好的生态基础。

The agriculture is the main emission source of N2O in the greenhouse gas.In this study,the effects of the chemical fertilizer,the planting area of rice,the effective irrigation area and feeding number of pigs on improvement of the emission of agricultural source N2O have been analyzed,based on statistical data from 1990 to 2008 by multivariable linear regression model.The results show that the factors which are all significantly correlated to the nitrous oxide emission are the application quantity of chemical fertilizer,the planting area of rice,the effective irrigation area and feeding number of pigs,among which the effective irrigation area exerts the greatest effects on nitrous oxide emission.Therefore,in the process of gradually changing farming practices,such methods as gradual improvement of agricultural irrigation technology,rational fertilization and scientific disposal of animal wastes can be applied to promote the change of agricultural production,reduce nitrous oxide emission and create a better ecological basis for the development of low-carbon agriculture in China.