植被恢复对建筑垃圾填埋场土壤理化性质变化的影响研究

对徐州市九里山建筑垃圾填埋场人工造林恢复植被后的土壤理化性质进行研究的结果表明，恢复样地土壤孔隙度增大，土壤密度减小，土壤pH呈下降趋势，土壤有机质和土壤全氮水平显著增加。但土壤全磷和有效磷含量随植被的生长呈降低趋势，原因可能为当土壤中有效磷含量不能满足植物根系吸收时，植物根系会分泌一些有机酸来活化土壤中的磷元素供植物吸收。土壤全钾含量没有显著差异，速效钾含量随着植被的生长而降低。

Research on Change of Soil Properities of Construction Waste Landfill Site After Revegetation

The soil physical and chemical properties of Jiuli construction waste landfill site were studied after revegetation in Xuzhou. The result showed that porosity of soil at the vegetation restoration sample area was increased, and soil density decreased. Soil pH was on the decline, and soil organic matter and total nitrogen in soil were significantly increased. Soil total phosphorus and available phosphorus content were in the reducing trend vegetation growth, the reason may be when the content of soil effective phosphorus can＇t satisfy the plant root system to absorb, plant roots secreted some organic acid to activate phosphorus for plants absorbing. Soil total potassium content were not significantly difference, but available potassium content reduced with vegetation growth.