[1]DONG Zhijin,ZHAN Xiuli,DING Xiaohua.Fractal Features of Soil Particles Under Different Land Uses in the Southwestern Edge of the Mu Us Sandy Land[J].Research of Soil and Water Conservation,2022,29(03):43-48+56.
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Fractal Features of Soil Particles Under Different Land Uses in the Southwestern Edge of the Mu Us Sandy Land
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
29
Number of periods:
2022 03
Page number:
43-48+56
Column:
Public date:
2022-04-20
- Title:
- Fractal Features of Soil Particles Under Different Land Uses in the Southwestern Edge of the Mu Us Sandy Land
- Keywords:
- soil particles; fractal dimension; sand-control; Mu Us sandy land
- CLC:
- S151.9
- DOI:
- -
- Abstract:
- In order to reveal the relationship between fractal features of soil particles and the effect of erosion control and sand fixation in land use types such as farmland, wasteland, grassland, scrub sand pile and forest land in the Mu Us sandy land, a method combining field sampling and indoor analysis was used to analyze the distribution of the size of soil particle, fractal dimension and the relationship between soil depth and fractal dimension for five land use types in this region. The results show that:(1)the particle size compositions of the soils in grassland, scrub sands and woodland are dominated by very fine sand, fine sand and middle sand, while particle size compositions in arable land and wasteland was dominated by silt and fine sand;(2)the soil particle size distribution and fractal dimension of the different land uses in the studied area differed significantly, with the order: wasteland>farmland>scrub sand pile>grassland>woodland; with the increase of soil depth, the fractal dimension value of woodland decreases, that of grassland increases, and that of wasteland, farmland and scrub sand pile does not change much;(3)the fractal dimension has highly and significantly positive correlation with <100 μm grain size content and negative correlation with >100 μm grain size content, the size of which is determined by the <100 μm very fine sand and fine silt contents. In conclusion, the distributions of the sizes of soil particles and fractal dimension of the five land use types in the studied region have significant distinction, which mirrors the changes of the particle composition caused by different types of vegetation effects and human regulation of tillage. It can also be a reflection of the soil degradation in southwestern edge of Mu Us sandy land, and provide theoretical evidence for soil restoration.
- References:
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Last Update:
2022-04-20