It was analyzed the soil physical characteristics of the side-slopes at dumping sites with different ages of vegetation restoration, which could provide a theoretical basis for controlling soil and water loss and restoring the vege-tation in the dumping sites caused by production and construction projects. The typical dumping sites in ChongqingMu-nicipality were selected for study of the soil physical characteristics of waste slag at different parts of the side-slopes in the dumping sites by using the methods of field survey and indoor analysis. The results indicated that the difference in fine particles ( <0. 25mm) was great, which decreased at first and then increased as time goes on. Bulk density ap-peared the decreasing trend following the age increase. The bulk density of 2 months and 4 years was 1. 48~1. 64 g/cm3 and 1. 20~1. 40 g/cm3, respectively. While the total porosity at different slope positions in the residue field was inversely related to soil bulk density. When soil water content significantly increased, the natural water content of four-year on the side-slope was about twice than that of two-month and two-year. Field water capacity of the four-year waste slag also topped the list, with the average water capacity of 22. 26% at the platform and the slope. Soil physical characteristics improved with the help of plant roots and litter, which strengthened slope stability.%研究不同植被恢复年限弃渣场土壤侵蚀物理性质特征,可为生产建设项目弃渣场水土流失防治及植被恢复提供理论基础。本文以重庆市典型弃渣场为研究对象,采用野外调查及室内综合分析等方法研究不同恢复年限弃渣场的边坡不同部位土壤物理性质特征。结果表明：不同恢复年限弃渣的细小颗粒(<0．25mm)含量差异较大,其随着时间的增加呈先减小后增加的趋势；随着恢复年限增加,弃渣容重呈减小的趋势,2月弃渣容重在1．48~1．64 g/cm3,4年弃渣容重可达1．20~1．40 g/cm3,而弃渣场不同坡位的总孔隙度均与土壤容重呈反比；土壤水分含量明显增大,4年弃渣边坡的自然含水率为2月和2年弃渣的2倍左右,田间持水量也以4年弃渣最大,其平台及边坡的平均持水量为22．26%；在植物根系及其枯落物作用下,弃渣边坡土壤物理性质得到改善,其增强了边坡稳定性。
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机译：石羊河下游民勤绿洲不同年限退耕地土壤物理性质与群落特征Studies of Soil Physical Properties and Community Characteristics of Different Abandoned Lands in the Minqin Oasis,Downstream of the Shiyang River
