| Soil infiltration characteristics of different plant community in sandy land of northwestern Liaoning |
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| DOI：10.7606/j.issn.1000-7601.2018.04.19 |
| Key Words: sandy land of northwestern Liaoning, soil infiltration, soil moisture, phytobiocoenose |
| Author Name | Affiliation | | LU Gang | College of Environmental Science and Engineering, Liaoning Technical University, Fuxin, Liaoning 123000 | | ZHAI Jing-xuan | College of Environmental Science and Engineering, Liaoning Technical University, Fuxin, Liaoning 123000 | | LI Ye-xin | College of Environmental Science and Engineering, Liaoning Technical University, Fuxin, Liaoning 123000 | | WANG Lei | College of Environmental Science and Engineering, Liaoning Technical University, Fuxin, Liaoning 123000 | | WANG Yun-ce | College of Environmental Science and Engineering, Liaoning Technical University, Fuxin, Liaoning 123000 |
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| Abstract: |
| The method of field double ring infiltration test and indoor soil physical properties analysis was used to study the soil infiltration characteristics of different plant community(arbor forest land, shrub land, artificial meadow, wild meadow) in sandy land of northwestern liaoning. The results showed that soil infiltration characteristics such as initial infiltration rate, 16 min infiltration rate, stable infiltration rate and cumulative infiltration rate of different plant communities were all represented as wild grassland> artificial grassland> shrub forest land> arbor woodland. Soil infiltration characteristics are negatively correlated with capillary porosity and silt content, soil infiltration characteristics are negatively correlated with soil initial moisture content, soil bulk density, non capillary porosity, sand and clay content, but not significant. The goodness of fit of soil infiltration process under different plant communities exist difference. The average goodness of fit of Horton Model, G-P Model, Philip Model, Kastiakov Model in turn was 0.948,0.896,0.893,0.868. The relative error of Horton Model was 15.71%~68.61 %, which can be used as a prediction model for soil infiltration processes of different plant communities in sandy land of northwest liaoning. The ranking of soil infiltration capacity evaluated by principal component analysis is wasteland> artificial grassland> shrubbery> arbor woodland,The cumulative contribution rate of principal component variance of the initial infiltration rate of soil, the 16min infiltration rate of soil, the stable infiltration rate of soil and the cumulative infiltration was 99.628% , which better expressed the infiltration capacity of soil. |
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