Vegetation Restoration Characteristics and Influencing Factors on Mining Waste Lands of Jinchuan Company
Biodiversity indicators are one of the important metrics for assessing the resilience of mine vegetation restoration.This study surveyed plant species composition and diversity characteristics of different mining wastelands in the Jinchuan mining area,based on field plot surveys,and further analyzed physicochemical properties of the soil in these wastelands.The results showed that:1)there are significant differences in plant diversity among plots at different restoration stages.Waste dump sites had more shrub species,while the periphery plots of the mining park had the richest herbaceous species.Additionally,Salsola ruthenica was the main herbaceous species in the mining wastelands,while Ammopiptanthus mongolicus and Salsola passerina were the dominant shrub species;2)With the increase in restoration years,the diversity of the shrub layer decreased,while that of the herbaceous layer increased.The Shannon-Wiener diversity index(H')and Simpson diversity index of the herbaceous layer in the peripheral sites of the mining park were significantly higher than those in the waste dumps,while the opposite for the shrub layer;3)The total soil carbon and nitrogen contents of the peripheral sites in the mining park were significantly higher than those of the other two sites,while the heavy metal contents(nickel,copper,zinc,cobalt,lead)of the waste dump sites were significantly higher than those of the other two sites.There is a close positive correlation between vegetation diversity and soil nutrients,indicating that the recovery of vegetation and the quality of soil change synergistically and influence each other.
NETL
NSTL
万方数据
