关键词: 氧化亚氮, 农业排放源, 低碳农业

Abstract: 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.

Key words: nitrous oxide, agricultural sources, low carbon agriculture