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对宁南山区典型区域——彭阳中庄小流域3种不同植被类型的土壤物理和化学性质进行了分析测定。结果表明:(1)沙棘林地和人工草地的土壤含水量、土壤容重和土壤孔隙度均小于自然封育,而沙棘林地和人工草地两者相比较而言,0—200cm土层沙棘林地的土壤平均含水量小于人工草地,0—60cm土层土壤容重人工草地相对较小,孔隙度相对较大;(2)0—60cm土层沙棘林地和人工草地的全氮、碱解氮和有机质平均含量与自然封育相比较,其含量由高到低的顺序为:自然封育>人工草地>沙棘林地,且差异显著;而全钾、速效磷、速效钾的平均含量与自然封育相比较,其含量由高到低的顺序为:林地>自然封育>人工草地;全磷平均含量变化依次为:林地>人工草地>自然封育。
Soil physical and chemical properties of three typical vegetation types in Zhongnang mountainous area - Pengyangzhongzhuang watershed were analyzed and determined. The results showed that: (1) The soil water content, soil bulk density and soil porosity of seabuckthorn forest and artificial grassland were less than those of natural enclosure. Compared with the seabuckthorn forest and artificial meadow, The average water content is less than that of artificial grassland, and the soil bulk density of artificial grassland in 0-60cm soil layer is relatively small and the porosity is relatively large. (2) The contents of total nitrogen, available nitrogen and organic matter in 0-60cm soil layer of seabuckthorn and artificial grassland Compared with the natural seal, the order of the content from high to low was: natural seal> artificial grass> seabuckthorn forest, and the difference was significant; while the average content of total potassium, available phosphorus and available potassium compared with natural seal, The order of the content from high to low was: forest land> natural enclosure> artificial grassland; and the order of the change of total phosphorus was woodland> artificial grassland> natural enclosure.