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[1]ZHANG Ruihao,XIAO Yang,XU Jinzhong,et al.Effect of Black Soil Erosion Gully Evolution on Soil Structural Features and Anti-erodibility in Sloping Farmland[J].Research of Soil and Water Conservation,2023,30(05):69-75.[doi:10.13869/j.cnki.rswc.2023.05.028.]

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Effect of Black Soil Erosion Gully Evolution on Soil Structural Features and Anti-erodibility in Sloping Farmland

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 05 Page number: 69-75 Column: Public date: 2023-08-10

Title:: Effect of Black Soil Erosion Gully Evolution on Soil Structural Features and Anti-erodibility in Sloping Farmland

Author(s):: ZHANG Ruihao¹, XIAO Yang¹, XU Jinzhong², WANG Yan¹, ZHANG Zhenye¹, WANG Jiahao¹, NIU Yuxuan¹; (1.College of Modern Agriculture and Ecology, Heilongjiang University, Haerbin 150080, China; 2.Institute of Hydro-science of Heilongjiang, Haerbin 150080, China)

Keywords:: soil erosion; black soil area; sloping farmland; anti-erodibility

CLC:: S157.1

DOI:: 10.13869/j.cnki.rswc.2023.05.028.

Abstract:: [Objective] The aims of this study are to elucidate the mechanism of erosion gully on the soil structure and anti-erodibility in sloping farmland in black soil area, and to provide basic data and theoretical support for the evolution of erosion gullies in black soil area. [Methods] Erosion gullies of different development degrees in Yanshou County, Harbin City were used as the study object, soil samples were systematically collected from the head, slope and bottom of these gullies, the structural and anti-erodibility of the soil were analyzed using conventional methods. [Results](1)WSA, MWD, GMD, and fractal dimension were significantly different among the gullies(p<0.05). With the development of erosion gullies, MWD, GMD and fractal dimension all showed the decreasing trend, following the order: CK( control group )>A₁(stable gully)>A₂(early semi-stable gully)>A₃(later semi-stable gully)>A₄(developing gully)at the 0—20 cm layer. With the soil layer deepening, the large water-stable aggregates decreased and the structure deteriorated.(2)Dispersive coefficient and<0.05 mm dispersion rate were significantly different among the gullies(p<0.05), both show an overall increasing trend in the 0—40 cm layer. The principal component analysis showed that the composite score of anti-erodibility of 0—20 cm and 20—40 cm layers both showed the order: CK>A₁>A₂>A₃>A₄. [Conclusion] Development of erosion gully is the main reason for the differences in soil structure and anti-erodibility in black soils. Soil structure tends to deteriorate in the 0—40 cm soil layer, while anti-erodibility weakens and erodibility increases.

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Last Update: 2023-08-10