[1]HE Yan,WEI Xia,WEI Ning,et al.Characteristics of Soil Particle Size Distribution of Main Land Surfaces in Qilian Mountains[J].Research of Soil and Water Conservation,2020,27(02):42-47，54.
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Characteristics of Soil Particle Size Distribution of Main Land Surfaces in Qilian Mountains
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 02
Page number:
42-47，54
Column:
Public date:
2020-03-30
- Title:
- Characteristics of Soil Particle Size Distribution of Main Land Surfaces in Qilian Mountains
- Keywords:
- soil particle size distribution; single fractal model; multi-fractal model; soil; Qilian Mountains
- CLC:
- S152.3
- DOI:
- -
- Abstract:
- In order to clarify the heterogeneity of soil particle size distribution(PSD)and reveal the soil property difference and land degradation trend of land surface in Qilian Mountains, four types of land use(desert, alpine steppe, alpine meadow, and shrub)in Qilian Mountains were selected as the research samples. The contents of soil particle sizes were measured using a laser particle analyzer, soil fractal model and correlation analysis were applied to study the coarseness and the heterogeneity of soil particle composition, and the effects of land-use and soil texture on fractal parameters were analyzed. The results show that the single fractal dimensions(DV)of the four land surfaces range from 2.089 to 2.500, the land surface has significant influence on the DV and multi-fractal parameters(capacity dimension D0, information dimension D1, correlation dimension D2, and D1/D0), that is, the ANOVA indicates that the coarseness of soil particles in desert is significantly higher (p<0.01)than those of alpine steppe, alpine meadow, and shrub, the local concentration rate and inhomogeneity of the soil PSD measurement of desert are significantly higher (p<0.05)than those of alpine steppe, and alpine meadow, indicating that the overall soil texture is coarse and presents a tendency of coarsening, and heterogeneity of soil texture increases from east to west in Qilian Mountains; the contents soil clay and silt are significantly positively correlated with DV, and positively correlated with multi-fractal parameters, DV and multi-fractal parameters are mainly affected by the content of clay and content of fine sand, respectively. This study analyzed the microstructure of soil particles in detail, which can provide the theoretical basis for soil improvement and actual production of different land surfaces in Qilian Mountains, and scientific basis for ecological environment management.
- References:
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Last Update:
2020-02-25