矿区复垦土壤养分变化趋势研究

系统研究了孝义露天铝矿不同复垦年限的土壤养分变化 ,结果表明 :随着复垦年限的增加 ,复垦土壤有机质、全氮、有效磷均呈逐年增加趋势 ,土壤容重逐年下降 ,土壤全磷、全钾、速效钾、土壤 pH、交换量和Cu、Zn、B、Mn、Fe等微量元素的有效态含量变化不明显。研究证明通过种植牧草和大量施用有机肥和化肥 ,可加速复垦土壤的熟化、土壤理化性状逐年改善 ,土壤生产力逐年提高。

Variability in Fertility of Reclaimed Soil in Colliery Regions

The present study is a systematic research on the changes of nutrients in soil due to long-term reclamation around Xiaoyi Open Aluminum Mine in Shanxi Province .The results show that the content of organic matter, total N and available P in the reclaimed soil shows a tendency of increase after many years of reclamation .However ,the soil bulk density decreases. There are no obvious changes in the content of total P, total K, available K and the trace nutrients, Cu, Zn, Mn, B, Fe. There are also no obvious changes in CEC and soil pH value .The study also shows that developing process of new-reclaimed soil can be sped up, the physic-chemical properties of the soil is improved and the productivity of the soil is increased by growing leguminous plants and extensive application of organic and chemical fertilizers.