Studies On Accumulation Ability Of Three Vertical Plants' Leaves To Heavy Metals

Parthenocissus tricuspidata,Rosa multiflora Thunb.and Jasminu mesnyi are three species which are common vertical plants in Nanjing. This study summarized the heavy metals'accumulation ability of the three plants'leaves through determining the five elements'contents of three plants'leaves. The results is as follows:1. The accumulation abilities of the three plants to five elements are as follows:(1) Parthenocissus tricuspidata: The accumulating extent of Zn is 9.5392~26.5363 mg/kg; The accumulating extent of Cu is 5.6918~16.6014mg/kg; The accumulating extent of Pb is 0.8594~10.4891mg/kg; The accumulating extent of Cd is 0.0252~0.0486 mg/kg; The accumulating extent of Cr is 0.0211~1.4597 mg/kg.(2) Rosa multiflora Thunb.:The accumulating extent of Zn is 11.3058~31.0958mg/kg; The accumulating extent of Cu is 5.2492~7.4125mg/kg; The accumulating extent of Pb is 0.8597~4.1931mg/kg; The accumulating extent of Cd is 0.0014~0.1368 mg/kg; The accumulating extent of Cr is 0.0446~0.5339 mg/kg.(3) Jasminu mesnyi:The accumulating extent of Zn is 11.1974~21.7894mg/kg; The accumulating extent of Cu is 7.1075~8.4042mg/kg; The accumulating extent of Pb is 0.5876-~2.3662mg/kg; The accumulating extent of Cd is 0.0000~0.0900mg/kg; The accumulating extent of Cr is 0.0417~0.8139mg/kg.2. The order of five elements'contents in the three plants is Zn>Cu>Pb>Cr>Cd。3. The month dynamics'laws of Zn and Cr in the three plants are basically consistent, which is the content of Zn or Cr is reduced from April to June, and increased from June to August, then reduced later; The month dynamics'laws of Cu in the three plants are basically consistent, which is the content of Cu is gradually reduced from April to the end of a year; The month dynamics'laws of Pb and Cd in Parthenocissus tricuspidata and Jasminu mesnyi are basically consistent, which is the contents of Pb or Cd is gradully increased to a constant from August.