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[1]Wei Siyu,Zhang Yanling,Liu Binhui,et al.Spatial Distribution Characteristics of Soil Physical Properties of Sloping Cultivated Land with Ridges in the Black Soil Region of Northeast China[J].Research of Soil and Water Conservation,2024,31(04):135-144.[doi:10.13869/j.cnki.rswc.2024.04.015]

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Spatial Distribution Characteristics of Soil Physical Properties of Sloping Cultivated Land with Ridges in the Black Soil Region of Northeast China

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 31 Number of periods: 2024 04 Page number: 135-144 Column: Public date: 2024-06-30

Title:: Spatial Distribution Characteristics of Soil Physical Properties of Sloping Cultivated Land with Ridges in the Black Soil Region of Northeast China

Author(s):: Wei Siyu¹, Zhang Yanling², Liu Binhui¹, Fu Yu¹; (1.College of Forestry, Northeast Forestry University, Harbin 150040, China; 2.Soil and Water Conservation Monitoring Center of Songliao Basin, Songliao Water Resources Commission, Changchun 130021, China)

Keywords:: black soil region; ridge; spatial variation characteristics; soil water holding capacity; soil structure characteristics

CLC:: S157.3⁺2; S151.9⁺2

DOI:: 10.13869/j.cnki.rswc.2024.04.015

Abstract:: [Objective]The aims of this study are to reveal the difference of spatial distribution of soil physical properties with and without earth ridge, and to provide scientific basis for the evaluation of soil and water conservation measures and soil restoration effects on sloping cultivated land in the black soil region. [Methods]This study focused on the sloping cultivated land with soil and water conservation measures(ridges)in the northeast black soil region, with untreated sloping cultivated land as control. A spatially uniform sampling method was used to obtain the basic indicators of soil physical properties in the surface layer(0—15 cm), and the spatial distribution characteristics of soil water holding capacity and soil structure with and without ridge measures on sloping cultivated land were quantified. [Results](1)After the construction of ridges, the soil moisture content, saturated water holding capacity, field water holding capacity, and capillary water holding capacity increased by 7.89%, 30.15%, 17.83%, and 19.41%, respectively.(2)The soil water holding capacities of the ridge plots on the top, middle, and bottom of the slope were higher than those of the untreated control plots, and the soil water holding capacity gradually increased with the decrease of slope position.(3)After the construction of ridges, the bulk density and fractal dimension(D)of the soil decreased by 12.04% and 0.58%, respectively, while the total porosity, capillary porosity, WR_>0.25, mean weight diameter(MWD), and geometric mean diameter(GMD)increased by 14.02%, 17.83%, 17.74%, 28.48%, and 21.31%, respectively.(4)The soil structures of the ridge plots on the top, middle, and bottom of the slope were better than those of the untreated control plots, especially on the top of the slope, which mainly affected the total porosity, MWD, GMD, and D; the middle and bottom of the slope mainly affected WR_>0.25, which increased by 18.5% and 17.89% compared to the untreated control plots. [Conclusion]The construction of soil and water conservation measures on sloping cultivated land can effectively improve soil water holding capacity and soil structure, and increase the content of stable aggregates, especially in the bottom of the slope.

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Last Update: 2024-06-30