As the only alkaline gas in the atmosphere, ammonia could react with sulfur dioxide and nitrogen oxides to form the secondary particles. A large amount of NH_(3) in the atmosphere accelerates the rate of formation of fine particles; it therefore plays an important role in haze pollution. Livestock and poultry farming and nitrogen fertilizer application are the two main NH_(3) emission sources. Jiangsu Province contributes the largest proportion of NH_(3) emissions from agriculture in key areas of national air pollution control in China. The aims of this study are to investigate NH_(3) emissions from agriculture in Jiangsu Province using the emissions factor method, and analyze and summarize the characteristics and trends of NH_(3) emissions from 2000 to 2017. Results show that the NH_(3) emissions from agriculture in Jiangsu Province from 2000 to 2017 were mainly contributed by livestock and poultry farming (78.08%) and nitrogen fertilizer application (21.92%). Furthermore, a general fluctuation trend of an initial decrease and then an increase, of NH_(3) emissions from agriculture, could be found from 2000 to 2012, with minimum NH_(3) emissions in 2007 (708.76 kt yr~(?1)) and maximum emissions in 2012 (837.64 kt yr~(?1)); and then a decreasing trend was apparent from 2012 (837.64 kt yr~(?1)) to 2017 (690.64 kt yr~(?1)). A detailed estimation of the interannual trends and potential measures are also proposed. This study provides a solid theoretical foundation for the development of NH_(3) emissions control in Jiangsu Province.
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