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Chinese Journal of Applied Ecology ›› 1997, Vol. 8 ›› Issue (2): 207-212.

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Ecological effect of compound pollution of heavy metals in soil-plant system Ⅰ.Effect on crop, soil microorganism, alfalfa and tree

Wu Yanyu1, Wang Xin1, Liang Renlu1   

  1. Institute of Applied Ecology, Academia Sinica, Shenyang 110015
  • Received:1996-09-18 Revised:1996-11-28 Online:1997-03-25 Published:1997-03-25

Abstract: The ecological effect of Cd,Pb,Cu,Zn and As compound pollution in soil plant system was studied in field plots. The designed concentration of pollutants was based on soil environmental standards or guidelines. The results show that there are interactions among these five elements, which cause a toxic effect on the ecosystem. The activity of soil microorganism is inhibited at low dose. At high dose, the crop yield is decreased by 10%, and on acid soil,by 50%. Alfalfa and tree are also yield decreased.

Key words: Compound pollution, Ecological effect, Heavy metals, ecosystem services flow, quantitative, ecosystem service value, supply and demand coupling