Effect of Earthworm(Pheretimasp.) Density on Revegetation of Lead/zinc Metal Mine Tailings Amended with Soil

作     者：Cheng Jiemin Ming H Wong 

作者机构：College of Population Resources and Environment Shandong Normal University Jinan Shandong 210014 China Croucher Institute for Environmental Sciences Department of Biology Hong Kong Baptist University Hong Kong China 

出 版 物：《Chinese Journal of Population,Resources and Environment》 (中国人口·资源与环境（英文版）)

年 卷 期：2008年第6卷第2期

页      面：43-48页

学科分类：083305[工学-城乡生态环境与基础设施规划] 08[工学] 09[农学] 0903[农学-农业资源与环境] 0833[工学-城乡规划学] 090301[农学-土壤学] 

基　　金：Acknowledgements: This research was funded by the Natural Science Fund of China (Grant No.40271068) and Natural Science Fund of Shandong Province of China (Grant No.Y2002E02) 

主　　题：lead zinc nitrogen phosphorus phytostabilization Pb/Zn mine tailings 

摘      要：The objective of this study was to investigate the ef- fects of earthworm density on the availability of nutrients and heavy metals in metal contaminated ***/Zn mine tailings were mixed throughly with a red yellow podzolic soil at the ratio (w/w) of 75:*** (Pheretima sp.) were introduced to the mixture at four different densities,zero,three,six and nine individuals per pot planted with ryegrass (Loliun multiflorum). The results indicated that earthworm activity significantly en- hanced ryegrass shoot ***,as denser earthworm population was introduced,shoot biomass tended to decrease. Earthworm activity significantly increased soil pH and availability of N,P and K in the tailings and soil *** was a general tendency that uptake of Zn by ryegrass increased after earthworm inoculation,although the increase in extractable Zn in tailings and soil mixture was not *** the contrary,there seemed to be a lower uptake of Pb by ryegrass under earthworm inoclation, despite the fact that higher extractable Pb concentrations were *** present project indicated that the improved growth of ryegrass was due to improved nutrient availability and other soil conditions,by inoculation of earthworms at an appropriate *** studies are needed to illustrate the relationship be- tween metal availability and earthworm activity in the field.