干旱区生态环境知识资源中心(Arid): Heterogeneity of soil structure and fertility during desertification of alpine grassland in northwest Sichuan

Arid

DOI	10.1002/ecs2.3161
	Heterogeneity of soil structure and fertility during desertification of alpine grassland in northwest Sichuan
	Ma, Li; Wang, Qing; Shen, Songtao; Li, Fucheng; Li, Li
通讯作者	Wang, Q
来源期刊	ECOSPHERE
ISSN	2150-8925
出版年	2020
卷号	11 期号:7
英文摘要	The variations of soil structure and soil physical-chemical properties in the process of alpine grassland desertification were revealed, and the indicators of grassland desertification were put forward in order to deepen the understanding of the law of degradation succession and development of alpine grassland. It was used to provide scientific basis for ecological restoration and improvement of ecological service function of alpine grassland. With severe desertification alpine grassland as the core in the Hongyuan County, Tibetan Qiang Autonomous Prefecture of Ngawa, Sichuan Province, China, along both the directions of wetland and arid grassland, the heterogeneity of soil structure and soil fertility in both directions was studied by the analysis of the mean weight diameter (MWD), geometric mean diameter (GMD), >0.25 mm aggregate content (R-0.25), fractal dimension (D), soil bulk density, soil moisture content, and soil nutrients. Our results showed that MWD, GMD, andR(0.25)all gradually increased, but theDdecreased with the reduction in the degree of desertification in the arid grassland and wetland, resulting in the strong stability of soil structure. The decreasing rate of theDin the direction of arid grassland was faster than that of wetland. Therefore, soil structure stability and erosion resistance in the direction of arid grassland were stronger than that of wetland soil; theDhad different response to aggregates with different particle sizes. The aggregate less than 0.25 mm (r = 0.981,P < 0.01) and 1-2 mm (r = -0.79,P < 0.01) had the largest responses in the direction of the arid grassland and wetland, respectively; the aggregate more than 1 mm and 1-2 mm can be used as indicators to evaluate desertification of the soil in the direction of the arid grassland and wetland, respectively. The higher the content of the indicating aggregates, the weaker the degree of the desertification.
英文关键词	deterioration of alpine grassland fractal dimension soil physical-chemical properties soil water-stable aggregates
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	SCI-E
WOS记录号	WOS:000567408500012
WOS关键词	ORGANIC-CARBON ; AGGREGATE STABILITY ; ECOLOGICAL RESTORATION ; LOESS PLATEAU ; WIND EROSION ; VEGETATION ; FRACTIONS ; INDEX
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326141
作者单位	[Ma, Li; Wang, Qing; Shen, Songtao; Li, Fucheng; Li, Li] Southwest Univ Sci & Technol, Sch Environm & Resource, Mianyang 621010, Sichuan, Peoples R China; [Ma, Li] Mianyang Normal Univ, Sch Resources & Environm Engn, Mianyang 621006, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Ma, Li,Wang, Qing,Shen, Songtao,et al. Heterogeneity of soil structure and fertility during desertification of alpine grassland in northwest Sichuan[J],2020,11(7).
APA	Ma, Li,Wang, Qing,Shen, Songtao,Li, Fucheng,&Li, Li.(2020).Heterogeneity of soil structure and fertility during desertification of alpine grassland in northwest Sichuan.ECOSPHERE,11(7).
MLA	Ma, Li,et al."Heterogeneity of soil structure and fertility during desertification of alpine grassland in northwest Sichuan".ECOSPHERE 11.7(2020).