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[1]TONG Shengchun,LI Guorong,LI Jinfang,et al.Soil Basic Characteristics and Wind Erosion in Degraded Barren Patches of Alpine Meadow in the Source of Yellow River[J].Research of Soil and Water Conservation,2023,30(04):10-17.[doi:10.13869/j.cnki.rswc.2023.04.022.]

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Soil Basic Characteristics and Wind Erosion in Degraded Barren Patches of Alpine Meadow in the Source of Yellow River

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 04 Page number: 10-17 Column: Public date: 2023-06-10

Title:: Soil Basic Characteristics and Wind Erosion in Degraded Barren Patches of Alpine Meadow in the Source of Yellow River

Author(s):: TONG Shengchun¹, LI Guorong^1,2, LI Jinfang¹, ZHAI Hui¹, ZHU Haili^1,2, LIU Yabin^1,2, CHEN Wenting¹, HU Xiasong^1,2; (1.Department of Geological Engineering, Qinghai University, Xining 810016, China; 2.Key Lab of Cenozoic Resource & Environment in North Margin of the Tibetan Plateau, Xining 810016, China)

Keywords:: source region of the Yellow River; alpine meadow; degraded barren patch; basic soil characteristics; soil wind erosion

CLC:: S157.1

DOI:: 10.13869/j.cnki.rswc.2023.04.022.

Abstract:: [Objective] The aims of this study are to clarify the basic characteristics of soil and the pattern of wind erosion in different types of degraded bare patches in alpine meadow, reveal the interaction between soil physical and mechanical properties with soil wind erosion, then provide a theoretical basis for the restoration and protection of ecological vegetation in the source region of the Yellow River. [Methods] Based on the field investigation and in-situ test, the physical and mechanical characteristics of soil, the difference of soil wind erosion pattern and correlation between soil wind erosion and erodibility factors were analyzed and discussed in seven kinds of meadow degraded barren land and plateau zokor mound in the Yellow River source. [Results](1)There were significant differences in the basic physical and mechanical properties of soils in different degraded bald land. The average soil moisture content, density, compactness and cohesion of seven bald land were 1.3 times, 2.6 times, 14.2 times and 5.0 times of plateau zokor hill, respectively. The restoration and growth of Saussurea eopygmaea in bald land had the strongest ability to retain water and soil, while Elsholtzia densa and Artemisia hedinii were relatively weak.(2)After 60 min of wind erosion, the total soil loss of plateau zokor mound was 1.3～4.4 times that of degraded barren land; the increment of wind erosion amount increased first and then decreased with the wind erosion time. The first 5～10 min of wind erosion was the sensitive period of soil wind erosion. Soil wind erosion in different degraded bald spots was related to vegetation restoration types, and was inversely proportional to soil physical and mechanical index values.(3)There was a linear negative correlation between soil wind erosion and vegetation coverage, soil moisture content and soil compaction, and an exponential negative correlation between soil wind erosion and soil cohesion. Soil wind erosion was significantly negatively correlated with soil cover, moisture content, compactness and cohesion, and significantly negatively correlated with soil density and soil average particle size, respectively. [Conclusion] Different types of degraded bare lands have an inhibitory effect on soil wind erosion by improving the basic physical and mechanical properties of soil. Among them, the inhibition effect of Saussurea eopygmaea is the best, and the inhibition effect of Elsholtzia densa and Artemisia hedinii are relatively weak.

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Last Update: 2023-06-10