[1]CAI Lulu,LIU Ziqi,LI Yuan,et al.Effect of Different Land Use Types on Soil Saturated Hydraulic Conductivity in Karst Areas[J].Research of Soil and Water Conservation,2020,27(01):119-125.
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Effect of Different Land Use Types on Soil Saturated Hydraulic Conductivity in Karst Areas
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 01
Page number:
119-125
Column:
Public date:
2020-02-20
- Title:
- Effect of Different Land Use Types on Soil Saturated Hydraulic Conductivity in Karst Areas
- CLC:
- S152.7
- DOI:
- -
- Abstract:
- It is of great significance to study the characteristics of saturated hydraulic conductivity(Ks)and its influencing factors in different land use types with respect to accurately understand the soil hydrological process and soil and water conservation effects in karst areas. In order to reveal the effect of different land use types on Ks in karst areas, the soil saturated hydraulic conductivity, bulk density, total porosity, capillary porosity, non-capillary porosity, capillary water capacity, field water capacity, soil water content and soil organic matter in soil layer of 0—50 cm were measured, and the correlation analysis of the influencing factors on Ks was carried out. The results showed that Ks of different land use types increased at first and then decreased with the increase of soil depth, and the Ks of 10—20 cm layer was significantly higher than that of other soil layers (p<0.05); the average Ks of soil in different land use types ranged from 6.41 m/d to 7.37 m/d, and decreased in the order: Zanthoxylum bungeamun field>Lonicera japonica field>Wasteland>Maize field, Ks of prickly ash field was significantly higher than that of the wasteland (p<0.05). Soil physical and chemical properties have different degrees to influence Ks. Correlation analysis shows that soil bulk density, total porosity, non-capillary porosity and soil organic matter are all significantly correlated with Ks (p<0.01). Path analysis further indicates that non-capillary porosity is the most important soil factor affecting Ks in this area. This study can help understand the soil hydrological process of different land use types in karst areas and provide the theoretical basis for ecological construction and ecological service evaluation in karst areas.
- References:
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Last Update:
2020-02-25