[1]CAO Danni,DI Hanyue,GUO Zhonglu,et al.Characteristics and Influencing Factors of Soil Preferential Flow in Different Succession Gradients[J].Research of Soil and Water Conservation,2021,28(02):99-107.
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Characteristics and Influencing Factors of Soil Preferential Flow in Different Succession Gradients
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 02
Page number:
99-107
Column:
Public date:
2021-02-06
- Title:
- Characteristics and Influencing Factors of Soil Preferential Flow in Different Succession Gradients
- Keywords:
- succession gradient; preferential flow; fundamentally physicochemical properties of soil; root length density
- CLC:
- S152; S153; S157.1
- DOI:
- -
- Abstract:
- In order to reveal the characteristics and changes of soil preferential flow in the process of vegetation restoration, five typical stages(wasteland, grasslands, shrubs, Platycladus orientalis forest, and mixed forest of arbor and shrubs)of vegetation restoration in Hujiashan Small Watershed were selected. By using the method with space instead of time, indoor analysis and field vegetation survey and dyeing tracer tests were conducted to analyze the variation patterns of soil preferential flow characteristics under different succession degrees, and the effects of soil properties and root diameters on preferential flow and water transport were discussed. The results showed that:(1)with the succession progresses, the number of soil preferential flow and the migration path increased; the soil preferential flow zones were different in the five succession gradients; the soil staining area ratio of Platycladus orientalis forest was the largest, followed by the mixed forest of arbor and shrubs, shrubs, grasslands, and the wasteland was the smallest;(2)soil bulk density, capillary porosity, soil organic matter content, and soil staining area ratio had the significant correlation, while sand content and clay content had no significant effect on preferential flow staining area in soil;(3)different diameter roots had different effects on soil preferential flow paths; the correlation between the root length density of root diameter(D)D≤0.5 mm and the soil staining area ratio was the most significant, followed by 0.5<D≤2 mm, 2<D≤3 mm, 3<D≤5 mm, the root length density of D>5 mm and soil staining area ratio was the least significant, indicating that soil bulk density, capillary porosity, soil organic matter content, and the root length density of root diameter(D)D≤2 mm mainly affected the generation and development of soil preferential flow.
- References:
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Last Update:
2021-02-10