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[1]杨开军,杨万勤,庄丽燕,等.四川盆地西缘都江堰大气氮素湿沉降特征[J].应用与环境生物学报,2018,24(01):107-111.[doi:10.19675/j.cnki.1006-687x.2017.04001]
 YANG Kaijun,YANG Wanqin,ZHUANG Liyan,et al.Characteristics of atmospheric wet nitrogen deposition in Dujiangyan, western edge of Sichuan Basin[J].Chinese Journal of Applied & Environmental Biology,2018,24(01):107-111.[doi:10.19675/j.cnki.1006-687x.2017.04001]
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四川盆地西缘都江堰大气氮素湿沉降特征()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
24卷
期数:
2018年01期
页码:
107-111
栏目:
研究论文
出版日期:
2018-02-09

文章信息/Info

Title:
Characteristics of atmospheric wet nitrogen deposition in Dujiangyan, western edge of Sichuan Basin
作者:
杨开军杨万勤庄丽燕李志杰贺若阳谭波张丽肖玖金徐振锋
1四川农业大学生态林业研究所,四川省林业生态工程重点实验室 成都 611130 2四川农业大学华西雨屏区生态环境监测站,长江上游生态安全协同创新中心 成都 611130
Author(s):
YANG KaijunYANG WanqinZHUANG Liyan LI Zhijie HE Ruoyang TAN Bo ZHANG Li XIAO JiujinXU Zhenfeng**
1 Key Laboratory of Ecological Forestry Engineering of Sichuan Province, Institute of Ecology,Forest, Sichuan Agricultural University, Chengdu 611130, China 2 Eco-environmental Monitoring Station in the Rainy Zone of Southwestern China and Collaborative Innovation Center of Ecological Security in the Upper Reaches of Yangtze River, Sichuan Agricultural University, Chengdu 611130, China
关键词:
氮沉降降水季节动态森林生态系统华西雨屏区
Keywords:
nitrogen deposition precipitation seasonal variation forest ecosystem Rainy Area of West China
分类号:
S718.55
DOI:
10.19675/j.cnki.1006-687x.2017.04001
摘要:
大气氮沉降已成为全球性环境问题,对陆地生态系统结构与功能产生显著影响. 于2015年8月-2016年7月,在都江堰灵岩山森林生态系统开展定位观测,分析大气降水中各形态氮素浓度;结合都江堰全年降水数据,估算当地湿氮沉降量的季节动态特征. 结果显示,观测期间全年降水量为1 073.4 mm,降水中可溶性总氮(TDN)、可溶性有机氮(DON)、铵态氮(NH4+-N)和硝态氮(NO3--N)平均浓度分别为5.9、2.9、1.6和1.4 mg/L,各形态氮浓度具有明显的季节变化特征,均表现为冬春季高于夏秋季. 湿氮沉降中各形态氮沉降量与降水量和降水频次呈显著正相关(P < 0.05). 全年TDN湿沉降量为36.2 kg hm-2 a-1,其中NH4+-N、NO3--N和DON分别为16.4、10.0和9.8 kg hm-2 a-1. 可溶性无机氮(DIN)沉降量占TDN沉降量的72.8%,DIN中有62.1%来自NH4+-N. 综上所述,都江堰地区湿氮沉降显著,且以无机氮为主,这可能对区域植被生长有一定促进作用. (图5 表1 参24)
Abstract:
Atmospheric nitrogen (N) deposition has become a global environment problem, which has a significant effect on the structure and function of terrestrial ecosystem. From August 2015 to July 2016, we investigated and analyzed the concentration of different forms of nitrogen in the precipitation in the forest ecosystem of Lingyan Mountain, Dujiangyan. Combined with the local precipitation data, we estimated the seasonal dynamics of wet nitrogen deposition. The annual precipitation during the study period was 1073.4 mm during the study period. The results showed that the annual concentration of total dissolved nitrogen (TDN), dissolved organic nitrogen (DON), ammonium nitrogen (NH4+-N), and nitrate nitrogen (NO3--N) was 5.9, 2.9, 1.6, and 1.4 mg/L, respectively. There were significant seasonal variations in each form of nitrogen. Furthermore, the nitrogen concentration during winter and spring was higher than that during summer and autumn. Wet nitrogen deposition exhibited a significant positive correlation with precipitation and its frequency. The annual total wet nitrogen deposition was 36.2 kg hm-2 a-1, of which NH4+-N, NO3--N, and DON were 16.4, 10.0, and 9.8 kg hm-2 a-1, respectively. Dissolved inorganic N (DIN) accounted for 72.8% of the TDN deposition and NH4+-N accounted for 62.1% of the DIN deposition. These results reveal that in the Dujiangyan area, there is a significant increase in the wet nitrogen deposition, mainly inorganic N, which might promote the growth of vegetation in the region.

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更新日期/Last Update: 2018-02-09