伊犁河谷大气氮湿沉降特征研究——以首府伊宁市为例  

Study on Characteristics of Atmospheric Nitrogen Wet Deposition in Yili River Valley——Taking Yining City as an Example

作　　者：张伟 余婷 何娇 刘忠权[1] ZHANG Wei;YU Ting;HE Jiao(School of Agricultural Engineering,Xinjiang Yili Vocational and Technical College,Yining,Xin-jiang 835000)

机构地区：[1]新疆伊犁职业技术学院农业工程学院,新疆伊宁835000

出　　处：《安徽农业科学》2022年第17期66-69,110,共5页Journal of Anhui Agricultural Sciences

基　　金：新疆维吾尔自治区重大专项(2020B01006);伊犁职业技术学院2020年度科研项目(2020002)。

摘　　要：为研究伊宁市大气氮素湿沉降的变化特征,2020年5月—2021年4月进行采样,并定量分析大气氮沉降各形态组分的变化特征。结果表明,伊宁市年均总氮湿沉降量为6.15 kg/hm^(2),其中NO_(3)^(-)-N湿沉降量为1.33 kg/hm^(2),NH_(4)^(+)-N湿沉降量为2.78 kg/hm^(2),可溶性有机氮(DON)湿沉降量为2.04 kg/hm^(2);无机活性总氮(TIN)湿沉降量占总氮(TN)比例为66.83%,DON占TN比例为33.17%。湿沉降量与降雨量呈显著正相关,湿沉降量在春季、冬季较高,占全年总湿沉降量的59.02%。伊宁市氮湿沉降量接近西部干旱地区氮沉降临界负荷4~10 kg/(hm^(2)·a)。因此,该地区水体富营养化及陆地生态系统(如草原、森林)的安全问题需要得到关注。In order to study the variation characteristics of atmospheric nitrogen wet deposition in Yining City,sampling was carried out from May 2020 to April 2021,and the variation characteristics of various forms and components of atmospheric nitrogen deposition were quantitatively analyzed.The results showed that the total nitrogen(TN)deposition were 6.15 kg/hm^(2),of which nitrate nitrogen(NO_(3)^(-)-N)deposition was 1.33 kg/hm^(2),ammonium nitrogen(NH_(4)^(+)-N)deposition was 2.78 kg/hm^(2),and soluble organic nitrogen(DON)deposition was 2.04 kg/hm^(2).Inorganic total nitrogen(TIN)deposition accounted for 66.83%of TN,DON accounted for 33.17%of TN.Wet deposition flux was positively correlated with rainfall.Wet deposition flux was higher in spring and winter,accounting for 59.02%of total N deposition.The wet N deposition in Yining City was close to the critical nitrogen deposition load of 4-10 kg/(hm^(2)·a)in western arid areas.Therefore,the eutrophication of water bodies and the safety of terrestrial ecosystems(such as grasslands,forests)in the region need to be concerned.

关 键 词：大气氮 湿沉降 变化特征 伊犁河谷 伊宁市 

分 类 号：X51[环境科学与工程—环境工程]