干旱区生态环境知识资源中心(Arid): 模拟氮沉降对北疆盐生荒漠群落特征的影响

Arid

	模拟氮沉降对北疆盐生荒漠群落特征的影响
其他题名	Effects of Simulated Nitrogen Deposition on Community Characteristics in Saline Desert Ecosystem of Northern Xinjiang
	王小东; 李旭; 董乙强; 马慧敏; 李宁
来源期刊	新疆农业科学
ISSN	1001-4330
出版年	2016
卷号	53 期号:5 页码:967-973
中文摘要	【目的】研究大气氮沉降对北疆盐生荒漠群落特征的影响。【方法】采用人工添加外源氮素的方法进行野外原位试验,设置4个(0,1,5, 10 g / m~2 )添加氮素水平,研究不同添加氮素对群落植被平均高度、总盖度、密度、生物量、重要值以及植被群落多样性的影响。【结果】(1)凋落物量、地上生物量和地上总生物量(前二者之和)随着添加氮素水平的增加均呈增加的趋势,且地上生物量在低(1 g /m~2 )、中(5 g /m~2 )、高(10 g /m~2 )添加氮素水平时都与对照(0 g /m~2 )差异显著(P < 0.05);(2)随着添加氮素水平的增加,优势种芦苇的重要值呈先升后降的波动变化,其他伴生种则表现出不同的变化趋势;(3)Shannon -Wiener 多样性指数和Margalef物种丰富度指数均随着添加氮素水平的增加显著降低,二者在低、中、高3个不同处理水平下分别比对照下降了12.2%、43.1%、43.5%和12.6%、44.5%、57.2%。【结论】添加氮素在短期内能够影响群落特征,促进优势种的生长,提高物种生产力,使植被多样性降低。
英文摘要	【Objective】To study the effects of atmospheric nitrogen deposition on community characteristics and species diversity in saline desert ecosystem in Northern Xinjiang.【Method】The simulative nitrogen deposition experiment at ambient environment was conducted by adding N fertilizer into the plots. Four levels (0,1,5 and 10 g /m~2 ) were set. The response of species height,coverage,density,biomass,important value and species diversity to the treatment was studied.【Result】Species productivity increased associated with the increasing of nitrogen addition. With the increasing of nitrogen addition,the important value of the main dominant species - Phragmites australis increased at first,then decreased,but the important value of the companion species showed different trend. Moreover,the Shannon - Wiener diversity index and Margalef species richness index decreased significantly with nitrogen addition increased. Comparative analysis indicated that the Shannon -Wiener diversity index and Margalef species richness index were decreased by 12. 2%,43. 1%,43. 5% and 12. 6%,44. 5%,57. 2% in low,middle and high nitrogen addition level,respectively.【Conclusion 】Nitrogen addition can affect community characteristics,promote growth of dominant species,community productivity and change community composition and decrease species diversity.
中文关键词	氮沉降 ; 盐生荒漠 ; 群落特征 ; 物种多样性
英文关键词	nitrogen deposition saline desert community characteristic species diversity
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:5736803
来源机构	新疆农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235187
作者单位	新疆农业大学草业与环境科学学院, 新疆土壤与植物生态过程实验室, 乌鲁木齐, 新疆 830052, 中国
推荐引用方式 GB/T 7714	王小东,李旭,董乙强,等. 模拟氮沉降对北疆盐生荒漠群落特征的影响[J]. 新疆农业大学,2016,53(5):967-973.
APA	王小东,李旭,董乙强,马慧敏,&李宁.(2016).模拟氮沉降对北疆盐生荒漠群落特征的影响.新疆农业科学,53(5),967-973.
MLA	王小东,et al."模拟氮沉降对北疆盐生荒漠群落特征的影响".新疆农业科学 53.5(2016):967-973.