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为探讨尖山河小流域不同土地利用类型的土壤肥力状况,采用野外取样和室内分析的方法,结合修正后的内梅罗指数,对次生林、灌草地、人工林、坡耕地4种地类的土壤肥力进行了对比分析。结果表明:各地类有机质和速效磷的含量处于全国中上水平,而全氮、全磷、碱解氮的含量较低,处于全国偏下水平;土壤综合肥力系数大小依次为次生林(1.13)>灌草地(1.09)>人工林(0.90)>坡耕地(0.76);坡耕地土壤肥力水平为贫瘠,次生林、人工林、灌草地土壤肥力为一般;次生林土壤肥力最好,坡耕地最差,说明植被覆盖和人为干扰是影响土壤肥力的主要因素,应坚持植被恢复和封山治理以改善该研究区的土壤肥力。
In order to explore the soil fertility of different types of land use in Jianshan River watershed, soil samples of four types of soils (secondary forest, shrub land, plantation and sloping land) were collected by field sampling and indoor analysis combined with the modified Nemerow index. Fertility conducted a comparative analysis. The results showed that the content of organic matter and available phosphorus in different places was in middle and upper middle level of China, while the contents of total nitrogen, total phosphorus and basic nitrogen were lower and lower in the whole country. The total soil fertility coefficient followed the order of secondary forest (1.13)> (1.09)> artificial forest (0.90)> sloping farmland (0.76). The soil fertility of sloping farmland was barren. The fertility of secondary forest, plantation and shrub-grassland was normal. The secondary fertile soil had the best soil fertility and the sloping farmland was the worst Vegetation cover and man-made disturbance are the main factors affecting soil fertility. Vegetation restoration and mountain closure should be insisted on to improve soil fertility in this study area.