Adopt short-term indoor reclaimed water irrigation in the soil column simulation and long-term field investigation,identify positioning,for reclaimed water irrigation to plant nutrients mischief ion and heavy metal element,and decrease of change were compared and analyzed.Results showed that,with clear-water contrast,reclaimed water irrigation made greenland soil pH lower,soil organic matter content increased,porosity increased,density and field capacity decreased;Total nitrogens,total phosphorus content wi...