[1]Cai Jiale,Meng Zhongju,Luo Jianguo,et al.Effects of Two Typical Protection Forests on Particle Size Characteristics of Surface Soil in Sandy Land in Qehan Dry Salt Lake[J].Research of Soil and Water Conservation,2024,31(04):179-187,196.[doi:10.13869/j.cnki.rswc.2024.04.007]
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Effects of Two Typical Protection Forests on Particle Size Characteristics of Surface Soil in Sandy Land in Qehan Dry Salt Lake
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
31
Number of periods:
2024 04
Page number:
179-187,196
Column:
Public date:
2024-06-30
- Title:
- Effects of Two Typical Protection Forests on Particle Size Characteristics of Surface Soil in Sandy Land in Qehan Dry Salt Lake
- Keywords:
- Qehan Dry Salt Lake; protective forest; Tamarix chinensis; Haloxylon ammodendron; granularity features
- CLC:
- S152.3
- DOI:
- 10.13869/j.cnki.rswc.2024.04.007
- Abstract:
- [Objective]The aims of this study are to investigate the soil mechanical composition and ecological effect under the protection forest of sandy land near Qehan Dry Salt Lake, and to provide scientific and technological support for local protection forest construction and sandy land management. [Methods]The soil samples of 0—20 cm were collected in inter-belt, root neck and under canopy of two protection forests, Tamarix chinensis and Haloxylon ammodendron on the southern edge of Qehan Dry Salt Lake. The mechanical composition of soil samples was measured by laser particle sizer. And the average particle size, standard deviation, skewness, peak state and fractal dimension were calculated and analyzed. [Results](1)The soil mechanical composition is mainly composed of sand particles, compared to bare sand(CK), the total contents of clay and silt increased by 5.19%, 0.59%, 20.44% and 1.53%, 3.93%, 4.32% in Tamarix chinensis and Haloxylon ammodendron(inter-belt, root neck and under canopy), respectively, with the most pronounced performance under canopy.(2)Soil sort ability was poor under shelterbelts, with a positive skewness towards a narrower tip; the fractal dimensions was between 2.13～2.70, higher under both shelterbelt canopies than between strips and root necks, and the overall particle size tended towards finer particles compared to CK.(3)Soil particle size frequencies revealed low slopes at all locations in the shelterbelts, indicating that the particle size class richness of both shelterbelts was better than those in the control. [Conclusion]The particle size parameters and sub-dimensional values reflect the improvement of the local sandy land by the two protected forests, with the trend of fine-grained soil under the red willow protection forest more obvious.
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Last Update:
2024-06-30