Effects of reclaimed water on soil nutrient of cool-season turfgrass in Lanzhou

Coolseason turf grass in Lanzhou including perennial ryegrass (Lolium perenne cv. Premier and L. perenne cv. Panterra), Kentucky bluegrass (Poa pratensis cv. Barvictor and P. pratensis cv. Barrister), tall fescue (Festuca arundinacea cv. Barlexas and F. arundinacea cv. Easy Care), white clover (Trifolium repens cv. Nanouk) and alfalfa (Medicago saliva cv. Algonquin) were irrigated with both tap water and reclaimed water from Lanzhou University Yuzhong Sewage Treatment Center to test the effects of reclaimed water on the soil characteristics. The results showed that reclaimed water could significantly improve (P0.05) soil available nutrient and total nitrogen and very significantly increase (P0.01) soil organic matter. There was no significant difference between total phosphorus contents of perennial ryegrass with tap water and reclaimed water treatments. Total potassium and sodium content of soil with reclaimed water treatment was significantly higher (P0.05) than those of soil with tap water treatment except with those of alfalfa. In conclusion, reclaimed water have rich nutrition elements which can be applied for turfgrass irrigation in Lanzhou.