关键词: 有效性, 有效性

Abstract: Reclaimed water irrigation is one of the potential ways of solving the shortage of water resources, the pollution risk on migration behavior of heavy metals in the soil which are irrigated by reclaimed water and the related soil surface are still short of research. Through the experimental study of different kinds of water irrigation methods on vegetable, it can be concluded that comparing with sewage irrigation and tap water irrigation, reclaimed water irrigation not only avoids the pollution of the soil but also saves the cost of water resources, and even provides a large number of growth elements for vegetables. The results showed that, after leaching by reclaimed water for 60 days, Cr, Cd, As, Hg, Pb, Ni, Zn and Cu from reclaimed water were enriched in soil to a certain degree, but with the leaching time extending, concentrations of the heavy metal remained stable. The variation of heavy metal content in soil irrigated by reclaimed water was small in vertical depth, basically showed a level trend. According to the soil environment quality standard (GB15618-1995), soil after irrigated by reclaimed water did not exceed the standard, better than soil quality standard of planting vegetables.