Influence of reclaimed water irrigation on turf growth and soil

Experiment of turf grass irrigation by reclaimed water was carried out at Beixiaohe Wastewater Treatment Plant in Beijing. Four kinds of reclaimed water: secondary treated wastewater-sec, ultra-filtration-uf, reverse osmosis-ro and micro filtration-mf (general and deep tertiary treated wastewater) and tap water(control) were used to irrigate six kinds of common turf grasses(Kentucky Bluegrass, Tall Fescue, Perennial Ryegrass, Creeping Bentgrass, Zoysiagrass and Buffalograss). Results showed that compared with tap water irrigation: 1) Secondary treated wastewater and general tertiary treated wastewater-uf can promote growth of turf grass evidently, increasing the chlorophyll contents significantly and enhancing adversity resistance appreciably, but deep tertiary treated wastewater-ro and mf has no these effects; 2) Except mf, reclaimed water irrigation has no significant effect on turf nutrient factors. After mf irrigation, Organic Matter of turf reduces sharply, and NH₄⁺, NO² elevated significantly; 3) There is no significant impact on soil pH& EC, soil heavy metal content, soil CI^-, S^2- and phenol content after reclaimed water irrigation.