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[1]JIANG Pinghai,ZHOU Zhengchao,LI Jing,et al.Changes and Influences of Soil Detachment Rate Under Different Vegetation Types in the Loess Plateau[J].Research of Soil and Water Conservation,2018,25(02):105-111.

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Changes and Influences of Soil Detachment Rate Under Different Vegetation Types in the Loess Plateau

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 02 Page number: 105-111 Column: Public date: 2018-04-03

Title:: Changes and Influences of Soil Detachment Rate Under Different Vegetation Types in the Loess Plateau

Author(s):: JIANG Pinghai, ZHOU Zhengchao, LI Jing, GE Fanghong; School of Geography and Tourism, Shaanxi Normal University, Xi’an 710062, China

Keywords:: Loess Plateau; vegetation types; soil detachment rate; soil physical and chemical properties; root characteristics

CLC:: S152

DOI:: -

Abstract:: In order to compare the effects of soil physical and chemical properties and root characteristics on soil detachment rate, using the method of erosion simulation test and laboratory analysis, we examined the changes and influences of soil detachment rate under different vegetation types in 3 kinds of treatments (root, canopy, and crust) in the Loess Plateau. The results showed that:(1) between different vegetation types, the soil detachment rate of Sophora viciifolia community was the lowest, significantly lower than Lespedeza davurica community; under different treatments, the detachment rate of crustal soil was the largest, followed by root soil, and then canopy soil; (2) the soil detachment rate was significantly positively related to soil bulk density (p < 0.05), the soil detachment rate was significantly negatively related to soil organic matter, soil aggregate (p < 0.05); If the influence of physical and chemical properties of soil on the soil detachment rate was only considered, the dominant factor influencing the soil detachment rate of S. viciifolia community and Bothriochloa ischaemum community was soil bulk density; the dominant factor influencing the soil detachment rate of Artemisia gmelinii community and L. davurica community was soil organic matter; (3) root characteristics were also the factors that influence the soil detachment rate; the soil detachment rate was negatively related to root biomass density, root length density, root surface area density and root volume density; If the influence of root characteristics on the soil detachment rate was only considered, the dominant factor influencing the soil detachment rate of S. viciifolia community, A. gmelinii community and B. ischaemum community was the root length density, the dominant factor influencing the soil detachment rate of L. davurica community was the root system surface area density; (4) in this study, the regression equation of soil detachment rate was expressed as D_r=0.086-0.035X₁+1.367X₂, (R²=0.767, N=36, p=0.000, X₁ is soil organic matter, X₂ is soil bulk density); the influence of physical and chemical properties of soil on the detachment rate was stronger than that of the root system; without considering the vegetation types, soil organic matter and soil bulk density were the key factors to decrease the soil detachment rate.

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