铜尾矿废弃地不同优势群落持水量的差异分析

Analysis on Holding Water Contents Difference of Dominant Communities in Copper Tailing Mine Waste Land

通过对安徽铜陵狮子山铜尾矿废弃地上定居的优势群落的实地调查及室内分析,研究了3种优势群落基质尾矿持水量的变化规律。结果发现,铜尾矿废弃地植被恢复后,基质的持水量发生显然的增加,节节草群落基质的持水量最高,比裸露无植被区高出16.95%,其次为白茅群落,狗牙根群落基质的持水量最低,但都高于对照裸露区。随着深层的增加,植被对尾矿的持水量增加。如节节草基质0-10 cm的持水量17.57%,10-20 cm持水量22.27%,20-30 cm持水量25.25%,30-40 cm持水量27.03%。结果表明,铜尾矿废弃地植物定居后,能提高尾矿的持水量,其中节节草群落的持水能力最高。

Holding water capacity of dominant communities in Shizishan copper tailings waste land in og Tongling city, were investigated and analyzed. The results showed that there was obvious difference among I. eynodon, C. daclylon and E. ramosissimum. The holding water contents of Equisetum ramosissimum community substance was highest, over 16.95% of non - vegetation areas. The holding water content of I. cynodon community was the second, and C. daclylon community was the third. The holding water content of each community increased as the depth increased. For example, the water content of E. ramosissimum＇ s substance was 17. 57% in the depth of 0 - 10cm, 22. 27% in the 10 -20cm depth, 5.25% in the 20 - 30cm depth, and 27.03% in the 30 -40cm depth. The results indicated that the holding water content of copper tailing mine for the dominant communities＇ substance was concerned with the vegetation establishing there, which increased water holding capacity of copper tailings. Especially, holding capacity of E. ramosissimum community was best and can be used in the restoration of the copper tailing mine.