关键词: 白刺群落消长, 降水, 地下水位

Abstract: With field sampling method,we measured the concentrations of Cu,Pb,Cd,Zn,and Mn in the waters around Siheshan industrial area of Wuhu,and compared the accumulation characteristics of these heavy metals in 8 species of hydrophytes grown there.The results showed that in the test waters,the concentrations of Cu,Pb,Cd,Zn,and Mn were 9,10.1,400,3,and 438 times higher than the standards,respectively,and all of the test hydrophytes could accumulate larger amounts of the metals.Hydrocharis dubia had the highest accumulation capability,with the concentrations of Cu,Pb,Cd and Zn being 9.12,33.41,0.8 and 26.9 times higher in its root,and 2.59,5,0.3 and 9.1 times higher in its stem and leaf than in the waters,respectively.The bioaccumulation coefficients of Cu,Pb and Zn in different organs of test plants were all larger than 1. For Typha orientalis,its root had a higher capability of accumulating Pb and Cd than its stem and leaf. Lemna minor,Typha orientalis,H.dubia,Sagittaria trifolia,Phragmites australis and Gynura crepidioides had the greater development potential and application prospect in the phyto-remediation of the waters contaminated by heavy metals such as Cu,Pb and Zn.

Key words: Growth and decline on Nitraria community, Precipitation, Underground water level