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为了评价植被对土壤抗冲性的影响,以晋西黄土区蔡家川流域刺槐林、油松林、次生林、退耕荒草地、农地、土质路面为研究对象,采用野外实地放水冲刷法,以侵蚀量为指标,研究不同地类土壤的抗冲性,并分析地被物、根系与土壤抗冲性的相关性。结果表明:不同地类的土壤抗冲性为次生林>刺槐林>油松林>退耕荒草地>土质路面>农地;单位面积上枯落物量及其厚度对土壤抗冲性的影响最大;土壤表层根系对土壤抗冲性也具有较大影响,能够有效提高土壤抗冲性的根系结构是0～30 cm土层中的毛根,其中,影响最大的是表层0～10 cm的根系,单位体积土壤内的根系越多,土壤抗冲性越强。
In order to evaluate the impact of vegetation on the soil anti-scourability, we investigated the effects of vegetation on the impact resistance of the soil in the Jiajiahe watershed in the Loess area in western Shanxi. The results showed that the erosion amount was Indicators to study the impact of different types of soils, and to analyze the correlation between the ground cover and the soil impact resistance. The results showed that the soil anti-scourability of different land types was the secondary forest> Robinia pseudoacacia forest> Pinus tabulaeformis forest> retreat grassland> soil pavement> farmland; litter quantity and its thickness per unit area had the greatest impact on the soil anti-scourability; The root system also had a great influence on the soil anti-scourability. The root system that can effectively improve the soil anti-scourability was the hair root in 0 ~ 30 cm soil layer. Among them, the root system with 0 ~ 10 cm surface layer, The more roots in the soil, the stronger the soil impact resistance.