干旱区生态环境知识资源中心(Arid): 极端干旱对内蒙古荒漠草原植物群落物种多样性和土壤性质的影响

Arid

	极端干旱对内蒙古荒漠草原植物群落物种多样性和土壤性质的影响
其他题名	Effects of Extreme Drought on Plant Diversity and Soil Properties of Inner Mongolian Desert Steppe
	朱国栋; 郭娜; 韩勇军; 吕广一; 王占义; 王成杰
来源期刊	中国草地学报
ISSN	1673-5021
出版年	2021
卷号	43 期号:3 页码:1673-5021
中文摘要	在内蒙古希拉穆仁荒漠草原利用人工设置野外减雨措施(生长季5~8月减雨66%、6~7月减雨100%和自然降雨)探讨荒漠草原植物群落物种多样性和土壤理化性质对极端干旱的响应特征。结果表明:(1)极端干旱改变了荒漠草原植物群落结构组成,促使多年生根茎型及一二年生草本植物成为主要优势种。(2)减雨66%和减雨100%两种极端干旱处理显著降低了Margalef丰富度指数和Shannon-Wiener多样性指数(P<0.05),Simpson优势度指数只在减雨100%处理下显著降低(P<0.05),但对Pielou均匀度指数的影响均不显著。(3)除表层土壤含水量在减雨66%条件下显著降低(P<0.05)外,两种极端干旱处理对土壤容重、土壤有机碳含量、土壤全氮含量及土壤碳氮比(C/N)的影响较小。以上结果表明在植物生长季,极端干旱对荒漠草原群落的物种组成和多样性水平影响较大,但对土壤性质的影响较小。
英文摘要	The response of plant community species diversity,and soil physical and chemical properties to extreme drought in Xilamuren desert steppe of Inner Mongolia were studied by using artificial field precipitation reduction measures(precipitation reduced by 66% from May to August,100% from June to July and natural precipitation). The results showed that the structure and composition of the plant community in the desert steppe were changed under extreme drought condition,and the perennial rhizome grasses,and annuals and biennials gradually became the dominant plants. Furthermore,the Margalef richness index and Shannon-Wiener diversity index were significantly decreased under 66% and 100% precipitation reduction treatments(P<0.05). While the Simpson dominance index was significantly decreased only under 100% precipitation reduction treatment,but the two extreme drought treatments had no significant effect on Pielou evenness index. Finally,the surficial soil water content decreased significantly under the condition of 66% rain reduction(P<0.05). The two extreme drought treatments had no effect on soil bulk density,soil organic carbon content,soil total nitrogen content and soil carbon nitrogen ratio(C/N). It can be concluded that the extreme drought had a greater impact on species composition and diversity of desert steppe community in the growing season,but had less influence on soil properties.
中文关键词	荒漠草原 ; 极端干旱 ; 植物多样性 ; 土壤理化性质
英文关键词	Desert steppe Extreme drought Plant diversity Soil physical and chemical properties
类型	Article
语种	中文
国家	中国
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:6941172
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/354552
作者单位	朱国栋, 内蒙古农业大学草原与资源环境学院, 呼和浩特, 内蒙古 010011, 中国.; 郭娜, 内蒙古农业大学草原与资源环境学院, 呼和浩特, 内蒙古 010011, 中国.; 吕广一, 内蒙古农业大学草原与资源环境学院, 呼和浩特, 内蒙古 010011, 中国.; 王占义, 内蒙古农业大学草原与资源环境学院, 呼和浩特, 内蒙古 010011, 中国.; 王成杰, 内蒙古农业大学草原与资源环境学院, 呼和浩特, 内蒙古 010011, 中国.; 韩勇军, 内蒙古自治区鄂尔多斯市农牧局, 鄂尔多斯, 内蒙古 017200, 中国.
推荐引用方式 GB/T 7714	朱国栋,郭娜,韩勇军,等. 极端干旱对内蒙古荒漠草原植物群落物种多样性和土壤性质的影响[J]. 内蒙古农业大学,2021,43(3):1673-5021.
APA	朱国栋,郭娜,韩勇军,吕广一,王占义,&王成杰.(2021).极端干旱对内蒙古荒漠草原植物群落物种多样性和土壤性质的影响.中国草地学报,43(3),1673-5021.
MLA	朱国栋,et al."极端干旱对内蒙古荒漠草原植物群落物种多样性和土壤性质的影响".中国草地学报 43.3(2021):1673-5021.