Revegetation of Copper Mine Tailings with Ryegrass and WillowEnglish Full Text

HAO Xiu-Zhen, ZHOU Dong-Mei and SI You-Bin State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China).

Abstract: To restore vegetation on metal mine tailings is very difficult because they often contain high concentrations of heavy metals, low nutrient content and low water retention capacity. This study involved 3 experiments that evaluated the effects of 4 treatment amendments: montmorillonite, rice straw, organic manure and chemical fertilizer on the growth of ryegrass （Lolium perenne L.） and willow （Safe viminalis L.） with Cu and Zn mine tailings from two mining areas. The results showed that ryegrass was the most tolerant of 4 crops to Cu toxicity. Also when organic manure, which contained high concentrations of inorganic salts, was added to the mine tailings, it significantly hindered ryegrass growth （P = 0.05）. Meanwhile, with ryegrass organic manure significantly increased （P = 0.05） the extractable Cu concentration in both mine tailings. When montmorillonite was used as a mine tailings amendment with willow, the height and tress number at the 1st cut were significantly greater （P = 0.05） than a control without montmorillonite. However there was no significant difference for height, tress number, dry weight or root dry weight at the 2nd cut. So, amendment applications to reduce metal toxicity and increase nutrients retention in mine tailings were essential during revegetation of mine tailings.

Keywords：

amendment; copper mine tailings; ryegrass （Lolium perenne L.）; willow （Salix viminalis L.）; zinc mine tailings;

Series：
(D) Agriculture; (B) Chemistry/ Metallurgy/ Environment/ Mine Industry
Subject：
Environment Science and Resources Utilization
Classification Code：
X173

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Revegetation of Copper Mine Tailings with Ryegrass and WillowEnglish Full Text

HAO Xiu-Zhen, ZHOU Dong-Mei and SI You-Bin State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China).

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