植被修复对废弃矿山土壤理化性质的影响

Influence of Vegetation Restoration on Soil Quality of Abandoned Mines

以葫芦岛周边废弃矿坑为研究对象,采用爆破客土和移栽树木方式对陡坡、斜坡和缓坡3种立地进行修复试验。结果表明:植被修复后,土壤容重除了2017年陡坡变化不显著外,其余都逐渐上升;3种立地孔隙度随修复年份的变化逐渐变小。3种立地有机质含量随修复年份的变化逐渐增加,缓坡的碱解氮含量也有所增加,土壤pH、速效磷和速效钾含量变化不显著。

Taking the abandoned mine pit around Hulu Island as the research object, the three kinds of sites of steep slope, slope and landslide were repaired by using blasting soil and transplanting trees. Result shows that after the vegetation restoration, the soil bulk density was not significantly changed except for the steep slope in 2017, and the other changes gradually increased;the three types of site porosity gradually changed with the change of the year. The content of organic matter in the three types increased gradually with the change of the year, and the content of alkali nitrogen in the gentle slope also increased. The changes of soil pH, available phosphorus & available potassium were not significant.