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林路边坡是森林系统的一个主要侵蚀源,而植被的稳定作用对减轻林路边坡的土壤流失效果显著。为期2a的研究调查了挂网护面与引种草类混播相结合、当地草类混播和引种草类混播3种护坡措施的效果。结果表明,各措施在陡峭填挖坡段均能显著地减少径流量和产沙量。在2a的研究中,经过植被处理后地表径流可减少 90%以上,物理护面处理可使植被盖度增加、产沙量降低。
Forest slope is a major erosion source of forest system, and the stabilizing effect of vegetation has a significant effect on reducing soil erosion of forest slope. The study of 2a investigated the effects of three kinds of slope protection measures, including the combination of net-shell protection and introduction of grasses, the mixing of local grasses and the introduction of grasses. The results show that all the measures can significantly reduce the runoff and sediment yield in the steep slope. In the study of 2a, the surface runoff can be reduced by more than 90% after vegetation treatment. The physical protection can increase the coverage of vegetation and reduce the sediment yield.