Effects Of Fly Ash On The Grow Of Lawn Grass And Pyrification Of Nan Ming River

As the lawn industry in our country developed fast in recent years, the large-scale lawn production has brought the serious malady that current topsoil has been destructively destroyed by the production of wrapping sward. Based on the fact that studied the lawn pyrification of Nan Ming river.This study mainly reported the feasibility of fly ash used in turf industry, its environmental efects and the assessment of turf quality. Pot experiments was done that fly ash mixed with soil according to diferent ratios to establish turfgrass to find the best ratios of fly ash and soil in the medium. Then the optimal fertilizing environments were researched and the influences of the turf medium on soil environment and underground water quality were appraised. Finally, a comprehensive assessment system of turf quality was proposed. Soil and fly ash and Lolium multiflorum L.cv, Barmultra was planted in the medium. The results indicated mixing fly ash with soil could enhance soil properties, such as contents of clay particles, available P, total P and part of metal elements, i.e.,P, N, Zn, Cu. These efects had great linear relation with the application rates of fly ash. At the same time, with the enhancement of rates of fly ash, the contents of Pb and Cd were increasing linearly. But contents of metallic elements, i.e., Zn, Cu, Pb were below the Grade One of Quality Standards of Soil Environment (QSSE). According to the Grade Three of cadmium element, the usage of fly ash should be controlled below 72. 5 percent. Growth and upgrounding yields of turfgrass were best in the treatment of S70F30, so application of fly ash at 30 percent rate should be the optional medium for sod.