干旱区生态环境知识资源中心(Arid): 新疆两种不同类型农田生态系统大气氮素干沉降分析

Arid

	新疆两种不同类型农田生态系统大气氮素干沉降分析
其他题名	Atmospheric Nitrogen Dry Deposition in Two Agroecosystems in Xinjiang
	庄晓玲 1; 李凯辉 1; 王晓丽 1; 刘学军 2
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2017
卷号	34 期号:6 页码:1395-1401
中文摘要	西北地区活性氮含量急剧增加,这将导致一系列的生态系统安全问题。2013年9月至2014年10月利用中流量大气颗粒物采样器和被动采样器,对新疆城市郊区和荒漠-绿洲交错带两种农田生态系统大气氮素干沉降开展定量研究。结果表明:城郊和荒漠-绿洲交错带农田生态系统大气活性氮NH_3、NO_2、颗粒态pNH_4~+ 、pNO_3~- 、可吸入颗粒物PM10年平均浓度分别为14.25、14.41、5.50、2.1、332.4 mug·m ~(- 3)和7.87、7.15、7.01、2.31、125.1 mug·m ~(- 3)。大气氮素干沉降总量为26.05 kg N·hm ~(- 2)·a~(- 1)和19.54 kg N·hm ~(- 2)·a~(- 1)。其中气体NH_3 - N、NO_2 - N和颗粒态NH_4~+ - N、NO_3~- - N的年总通量分别为12.46、3.15、2.88、7.56 kg N·hm~(- 2)·a~(- 1)和4.42、2.23、9.80、3.10 kg N·hm~(- 2)·a~(- 1), 分别占干沉降总量的48%、12%、9%、11%和23%、11%、50%、16%。研究表明,城郊农田生态系统以NH_3 - N沉降为主,荒漠-绿洲交错带农田生态系统以颗粒态NH_4~+ - N沉降为主。城郊农田生态系统大气氮素干沉降总量是荒漠-绿洲交错带农田生态系统的1.33倍,大气氮组分中NH_3 - N、NO_2 - N的沉降量远高于荒漠-绿洲农田,可见,人为活动对农田生态系统的影响更为显著。
英文摘要	Atmospheric nitrogen (N) dry deposition has caused concern in arid and semiarid areas in China,and atmospheric reactive nitrogen (Nr) species have increased dramatically due to the increase of human activities over these areas in recent years. In order to quantitatively estimate the total N dry deposition on suburban farmland and desert-oasis farmland in Xinjiang, the atmospheric concentrations of NH_3 and NO_2, inhalable particulate matters (PM10) and particulate ammonium and nitrate (pNH_4~+ and pNO_3~-) were monitored using the passive samplers and particulate samplers during the period from September 2013 to August 2014. The results revealed that, in the study region, the annual mean concentrations of NH_3, NO_2, pNH_4~+, pNO_3~- and PM10 at two sites of suburban farmland and desert-oasis farmland were 14.25,14.41,5. 50,2.1 and 332.4 mug·m ~(- 3),and 7.87,7. 15,7. 01,2. 31 and 125.1 mug·m ~(- 3), respectively. The annual dry deposition rates of atmospheric N at the two sites were estimated as 26.05 kg·hm ~(- 2). and 19.54 kg·hm ~(- 2). respectively. The annual fluxes of gasphase NH_3 and NO_2 and particulate ammonium and nitrate pNH_4~+ and pNO_3~- were 12.46,3. 15,2. 88 and 7.56 kg N·hm ~(- 2),and 4.42,2. 23,9. 80 and 3.10 kgN·hm ~(- 2),and their proportions in the total annual N deposition were 48%,12%,9 % and 11%,and 23%, 11%,50% and 16%, respectively. NH_3 was the dominant species (48%) in total Nr dry deposition in the suburban farmland,but in the desert-oasis farmland the dominant species was particulate nitrate. The total Nr dry deposition in the suburban farmland was 1.33 times of that in the desert-oasis farmland. Deposition of NH_3 and NO_2 was also higher in the suburban farmland than that in the desert-oasis farmland. Thus,dry deposition contents of atmospheric Nr in the farmland ecosystem were affected significantly by human activities.
中文关键词	农田生态系统 ; 城郊农田 ; 荒漠- 绿洲 ; 氮沉降 ; 颗粒物 ; 活性氮 ; 新疆
英文关键词	agro-ecological system suburban farmland desert-oasis nitrogen deposition particulate matter reactive nitrogen Xinjiang
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6119912
来源机构	中国科学院新疆生态与地理研究所 ; 中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/236031
作者单位	1.中国科学院新疆生态与地理研究所, 中国科学院干旱区生物地理与生物资源重点实验室, 乌鲁木齐, 新疆 830011, 中国; 2.中国农业大学资源与环境学院, 北京 100193, 中国
推荐引用方式 GB/T 7714	庄晓玲,李凯辉,王晓丽,等. 新疆两种不同类型农田生态系统大气氮素干沉降分析[J]. 中国科学院新疆生态与地理研究所, 中国农业大学,2017,34(6):1395-1401.
APA	庄晓玲,李凯辉,王晓丽,&刘学军.(2017).新疆两种不同类型农田生态系统大气氮素干沉降分析.干旱区研究,34(6),1395-1401.
MLA	庄晓玲,et al."新疆两种不同类型农田生态系统大气氮素干沉降分析".干旱区研究 34.6(2017):1395-1401.