重庆市主城区农业源氨排放研究

对重庆主城区畜禽养殖业氨(NH3)排放因子进行了本地化修正,估算了农业源NH3排放量。主城区农业源年排放NH38 482 t,其中化肥施用NH3排放量最大,占总排放量的66.7%;畜牧养殖业占26.3%;农作物释放占6.9%。巴南区农业源NH3排放量最大,占主城区排放总量的41%,渝中区为零排放。主城区农业源NH3排放强度为1 552.1kg/km2,大渡口区排放强度最高。主城区畜禽养殖业NH3排放比例低于全国平均水平,化肥施用NH3排放比例高于全国平均水平,但与全国农业源NH3排放结构类似。

Research on Ammonia Emission from Agricultural Sources in Chongqing Urban City

Local ammonia(NH₃)emission factors of Livestock and poultry breeding in Chongqing urban city is revised and NH₃ emission from agricultural sources is calculated. NH₃ emission amount from agricultural sources is 8 482 tons every year in urban city. NH₃ emission from chemical fertilizer application, which is the largest contributor, takes account for 67%. NH₃ emission from livestock and poultry breeding takes account for 26%; crop emission takes account for 6.9%. NH₃ emission in Banan district is the most, which takes account for 41% of total NH₃ emission. Yuzhong district has no NH₃ emission from agricultural sources. NH₃ emission intensity is 1 552.1 kg/km² in urban city, NH₃ intensity in Dadukou district is the most. Proportion of NH₃ from livestock and poultry breeding is higher than the national average proportion, proportion of NH₃ emission from chemical fertilizer application is lower than the national average proportion, but structure of agricultural NH₃ emission is similar to the national's.