[1]Zhao Enhui,Wu Lei,Zhao Shenghua.Comprehensive Evaluation of Soil Water Conservation Function of Different Vegetation Types in the Yellow River Delta[J].Research of Soil and Water Conservation,2023,30(06):255-263.[doi:10.13869/j.cnki.rswc.2023.06.033]
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 06
Page number:
255-263
Column:
Public date:
2023-10-10
- Title:
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Comprehensive Evaluation of Soil Water Conservation Function of Different Vegetation Types in the Yellow River Delta
- Author(s):
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Zhao Enhui1, Wu Lei2, Zhao Shenghua3
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(1.Tangshan Institute of Water Resources Planning and Design, Tangshan, Hebei 063000, China; 2.College of Water Sciences, Beijing Normal University, Beijing 100875, China; 3.China State Construction Engineering Co., Ltd., Beijing 100029, China)
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- Keywords:
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water conservation function; Yellow River Delta; soil hydrological effect; infiltration
- CLC:
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S157; S715.7; S727.21
- DOI:
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10.13869/j.cnki.rswc.2023.06.033
- Abstract:
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[Objective] The aims of this study are to reveal the differences in soil physical properties among different vegetation types, clarify the impact of vegetation types on soil water conservation function, and provide scientific basis for the evaluation of ecological and hydrological effects of vegetation restoration in the Yellow River Delta. [Methods] Robinia pseudoacacia, Salix psammophila, Fraxinus chinensis were selected as the research objects. The characteristics of the soil bulk density, porosity, water holding capacity and infiltration characteristics with 0—30 cm soil layer were studied and the soil water conservation function of different vegetation types was evaluated by principal component analysis. [Results] Soil bulk density of Robinia pseudoacacia, Salix psammophila, Fraxinus chinensis, bare land with 0—30 cm soil layer was 1.28, 1.33, 1.39, and 1.44 g/cm3, and the total soil porosity, capillary porosity, and non-capillary porosity were 46.36%~51.75%, 38.52%~40.91%, 7.24%~12.21%, respectively. Compared with bare land, the soil bulk density of Robinia pseudoacacia, Salix psammophila, Fraxinus chinensis decreased by 11.11%, 7.64%, and 3.47%, respectively, and the soil porosity increased. The maximum soil water holding capacities of 0—30 cm soil layer in the four sample plots were significantly different(p<0.05), and the values were 517.50, 501.00, 480.87, and 463.61 t/hm2. The capillary and non-capillary water holding capacities of 0—30 cm soil layer in the four sample plots were not significantly different(p>0.05), and the values were 385.23~409.06 t/hm2 and 72.39~122.11 t/hm2, respectively. The stable infiltration rates of Robinia pseudoacacia, Salix psammophila, Fraxinus chinensis, bare land were 4.91, 2.89, 4.05, and 1.02 mm/min, which were 381.37%, 183.33%, and 297.06% higher than the bare land, respectively. The goodness of fit of the four infiltration models was Horton>general empirical>Kostiakov>Philip, Horton model could better simulate the soil infiltration process in the study area. Two principal components could be obtained by principal component analysis, and the cumulative contribution rate was 99.896%. Through principal component analysis, two principal components could be obtained, and the cumulative contribution rate was as high as 99.896%. The comprehensive order of soil water conservation function in the four sample plots was Robinia pseudoacacia>Fraxinus chinensis>Salix psammophila>bare land. [Conclusion] Judging from soil structure, water holding capacity and permeability, the soil improvement effect of Robinia pseudoacacia was better than Salix psammophila and Fraxinus chinensis. Robinia pseudoacacia may be prioritized in the Yellow River Delta and in areas similar to its habitat.