Abstract: Field experiment showed that because of the interaction among Cd, Pb, Cu, Zn and As, the absorption coefficient of Cd, Pb and Zn for crops was increased,and the exceeding percentage——the content of pollutant in seed, which exceeds the food health standard——was 16.6～42.85% in low dosage and 16.6～71.42% in high dosage treatment. The Cd and Pb contents in alfalfa stem and leaf exceeded the forage health standard, and the pollutant contents in tree were also increased in all treatments, which was even more serious in acid and neutral soils.

Key words: Heavy metal, Compound pollution, Ecological effect, water quality, river, model simulation, water environment, ecological engineering