沈阳市区降水中氮素的组成及季节变化  

Composition and seasonal fluctuation of nitrogen from precipitation in urban area of Shenyang

作　　者：宋欢欢[1] 姜春明[1] 宇万太[1] 

机构地区：[1]中国科学院沈阳应用生态研究所,沈阳110016

出　　处：《生态学杂志》2014年第3期741-747,共7页Chinese Journal of Ecology

基　　金：国家青年科学基金项目(41105114)资助

摘　　要：于2012年2—12月在沈阳市区采集降水样品,分析了各形态氮素的浓度和沉降通量,探讨了影响氮沉降的相关因素。结果表明:NH4+-N、NO3--N及DON的平均浓度分别为1.57、0.87和0.82 mg N·L-1,随降水进入该地区的总氮沉降量26.17 kg N·hm-2·a-1,其中NH4+-N、NO3--N和DON分别为12.56、7.02和6.59 kg N·hm-2·a-1,与降水量呈幂型正相关;通过分析各形态氮素季节变异可知,降水中的氮主要来自当地工农业生产,同时受当时降水量的影响。In the urban area of Shenyang, we sampled precipitation from February to December in the year of 2012, investigated the nitrogen （N） concentration and deposition flux from precipi- tation, and elucidated the possible factors influencing the variation of N deposition. The results showed that the average concentrations of NHn＋-N, NO3--N and DON were 1.57, 0.87 and 0.82 mg N·L^-1 respectively. The total N deposited from precipitation was 26.17 kg N·hm^-2·a^-1 among which the deposition of NH4＋-N, NO3--N and DON were 12.56, 7.02 and 6.59 kg N ·hm^-2·a^-1, respectively. The N deposition was positively correlated with precipitation when fitted with a power equation. Seasonal fluctuations of different N forms suggested N deposition was mainly derived from the local industrial and agricultural production; in the meantime, the precip- itation amount also played an important role.

关 键 词：沈阳市区 大气氮沉降 湿沉降 降水量 季节变异 

分 类 号：X51[环境科学与工程—环境工程]