Spatial variation of soil physical properties and its relationship with plant biomass in degraded slopes in dry-hot valley region of Southwest China

doi:10.1007/s11368-020-02617-z

	Spatial variation of soil physical properties and its relationship with plant biomass in degraded slopes in dry-hot valley region of Southwest China
	Yuan, Yong 1,2; Xiong, Donghong 1; Wu, Han 1,2; Zhang, Su 1,2; Zhang, Baojun 1; Dahal, Nirmal Mani 1,2; Liu, Lin 1,2; Li, Wanxin 1,2; Zhang, Wenduo 1,2; Shi, Liangtao 3
刊名	JOURNAL OF SOILS AND SEDIMENTS
	2020-05-01
卷号	20 期号:5 页码:2354-2366
关键词	Land degradation Plant distribution Hydraulic conductivity Spatial variability Dry-hot valley
ISSN号	1439-0108
DOI	10.1007/s11368-020-02617-z
通讯作者	Xiong, Donghong(dhxiong@imde.ac.cn)
英文摘要	Purpose Soil properties are one of the most important factors affecting the distribution and growth of plants in arid and semi-arid regions, especially in the dry-hot valley of southwest China, where desertification is a serious environmental problem deteriorating the dryland ecosystems. However, the spatial variation of soil physical properties and its relationship with plant productivity in degraded slopes is not yet fully understood. Materials and methods In this study, three parallel downslope transects were built on a typical degraded slope in the dry-hot valley of Jinsha River, and soil physical properties (including soil particle size, bulk density (BD), total porosity (TP), capillary porosity (CP), noncapillary porosity (NP), saturated water capacity (SWC), capillary water capacity (CWC), field water capacity (FWC), and hydraulic conductivity (Ks)) at two soil depths (0-10 cm and 10-20 cm) and plant biomass (reflected by aboveground biomass) were measured. Results and discussion The results indicated that the sand content, TP, NP, SWC, CWC, and Ks increased firstly and then decreased, while the silt content and BD decreased firstly and then increased from upper slope to lower slope. Plant biomass was only observed in middle and lower slopes, and that in the lower slope was decreased significantly to slope foot. Slope position and soil depth had significant effects (P < 0.05) on soil physical properties, indicating that topography and soil depth play a key role in driving the spatial variation in soil physical properties. Simple linear regression analysis showed that Ks, sand, and silt content are the key soil indicators affecting plant growth, and the soil layer differences in BD, CWC, and FWC are also the important factors affecting plant productivity. Conclusions Our findings highlight the spatial variation of soil physical properties, and plant biomass is attributed to the interactions of topography-soil-plant, which is critical for the healthy function of degraded slopes. Such findings provide an important basis for ecological restoration and management in degraded regions.
WOS关键词	YELLOW-RIVER DELTA ; LOESS PLATEAU ; VEGETATION COVERAGE ; MASS FAILURE ; EROSION ; RUNOFF ; DESERTIFICATION ; GRASSLAND ; FEEDBACKS ; CATCHMENT
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000528598500004
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/159866]
专题	中国科学院地理科学与资源研究所
通讯作者	Xiong, Donghong
作者单位	1.Chinese Acad Sci & Minist Water Resources, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Yunnan Acad Agr Sci, Inst Trop Ecoagr Sci, Yuanmou 651300, Peoples R China
推荐引用方式 GB/T 7714	Yuan, Yong,Xiong, Donghong,Wu, Han,et al. Spatial variation of soil physical properties and its relationship with plant biomass in degraded slopes in dry-hot valley region of Southwest China[J]. JOURNAL OF SOILS AND SEDIMENTS,2020,20(5):2354-2366.
APA	Yuan, Yong.,Xiong, Donghong.,Wu, Han.,Zhang, Su.,Zhang, Baojun.,...&Shi, Liangtao.(2020).Spatial variation of soil physical properties and its relationship with plant biomass in degraded slopes in dry-hot valley region of Southwest China.JOURNAL OF SOILS AND SEDIMENTS,20(5),2354-2366.
MLA	Yuan, Yong,et al."Spatial variation of soil physical properties and its relationship with plant biomass in degraded slopes in dry-hot valley region of Southwest China".JOURNAL OF SOILS AND SEDIMENTS 20.5(2020):2354-2366.