Effect of Different Amendments on Ryegrass Growth in Copper Mine Tailings

作     者：HAO Xiu-Zhen, ZHOU Dong-Mei, WANG Yu-Jun, CANG Long and CHEN Huai-ManInstitute of Soil Science, the Chinese Academy of Sciences, Nanjing 210008 (China). E-mail: xzhao@issas. *** 

作者机构：Institute of Soil Science the Chinese Academy of Sciences Nanjing 210008 (China) 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2003年第13卷第4期

页      面：299-308页

核心收录：

学科分类：082802[工学-农业水土工程] 08[工学] 0828[工学-农业工程] 

基　　金：Project supported by the Knowledge Innovative Program of the Chinese Academy of Sciences (No. KZCX2-401) the Director Foundation of Institute of Soil Science, the Chinese Academy of Sciences (No.ISSASIP0102) 

主　　题：amendment metal availability mine tailings remediation ryegrass 

摘      要：Montmorillonite, rice straw, organic manure and chemical fertilizer were usedas amendment materials for copper mine tailings, and their effects on mine tailing pH, nutrientsarid metal availability to ryegrass were investigated. Chemical fertilization was the most effectiveone in improving ryegrass growth in mine tailings among the amendment materials examined. It wasfound that montmorillonite raised biomass of ryegrass at the 1st and 2nd cuts, but it did not givefurther positive effects at the3rd and 4th cuts. The effect of organic materials on ryegrass growthwas not so good as expected, mainly due to their slow decomposition in mine tailings with less soilmicroorganisms. Available Cu and Zn contents in mine tailings decreased in the presence ofmontmorillonite but increased when rice straw and organic manure were used as amendments. Cu and Zncontents in ryegrass decreased with increasing the rate of montmorillonite application but increasedwith the rate of rice straw. Zn showed much stronger mobility from soil lo ryegrass than Cu, andalmost all the available N and P in mine tailings, except for the treatments with organic manure,were completely consumed after ryegrass had grown in mine tailings for more than four months andbeen harvested for four times. Owing to its large biomass and high metal uptake, ryegrass is apotential plant for remediation of metal contaminated soils in practice.