Reclamation of heavy metal mine wastes with compost: influence on soil biological processes
One method for recovering a Pb and Zn contaminated soil is to apply large quantities of organic matter in order to improve soil characteristics, which enhances biogeochemical nutrient cycles. We used beef manure compost applied at two different rates with and without lime and bentonite to investigate the effects on some soil biological properties. Switchgrass (Panicum virgatum) was seeded into plots to establish a vegetative cover. Unfortunate|y, for a variety of reasons, vegetation was unable to be established in year 1. Compost additions drastically changed N, P, and K contents along with pH values. Enzyme activities and microbial biomass measurements were used to monitor nutrient cycles upon amendment addition. Experimental results indicate that after five months the HC, HCL, and HCLB treatments had significantly higher arylsulfatase compared to all other treatments. The HC treatment had a significantly higher β-glucosidase activity and also a higher microbial biomass C. After five months it appears that the high compost rate is supporting higher biological activity as compared to the contaminated control. As time passes, it will be interesting to see if a single high rate application can continue to re-establish and sustain a healthy soil microbial ecology.
heavy metals In situ remediation biogeochemical cycles
L. R. Baker G. M. Pierzynski
Department of Agronomy, Throckmorton Plant Sciences Center, Kansas State University, Manhattan, KS 66506-5501
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
892-893
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）