不同改良剂对铜矿尾矿砂的改良效果研究

Abstract

Abstract: A study was conducted on effect of montmorillonite,rice straw and fowl dung,used as amendment, on growth of ryegrass on copper mine tailing.Results show that biomass of ryegrass in a 25 day growth period changed in the presence of amendments.Addition of montmorillonite improves growth of ryegrass.Meanwhile,low rate of rice straw and fowl dung stimulates growth of ryegrass,too.Compared with the control, montmorillonite increases the content of available NH ₄ ⁺ in copper mine tailing.In addition,fertilization of copper mine tailing decreases its pH value by 1～2.Available Cu,Zn,Pb and Cd in copper mine tailing was found increasing with the quantity of rice straw and fowl dung applied,but decreasing with montmorillonite.Heavy metals in ryegrass in most conditions are exceeding the criteria set in the national hygiene standard for food.

Key words: mine tailing, ryegrass, heavy metals, amendments, montmorillonite, rice straw, fowl dung

CLC Number:

X131.3

HAO Xiu-Zhen, ZHOU Dong-Mei, WANG Yu-Jun, CHEN Huai-Man. Effect of Amendments on Ryegrass Grown on Copper Mine Tailing[J]. Journal of Ecology and Rural Environment, 2002, 18(1): 11-15.

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Effect of Amendments on Ryegrass Grown on Copper Mine Tailing

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