Influence Of Golf Green And Leachate With Recycled Water Irrigation

This study was choosed on Golf green as the study area,which used A randomized block design, including three water-treatments,which were Tap Water(TW),Secondary Recycled water(SR) and Tertiary Recycled water(TR).Meanwhile,Three different top dressing practices were taken on the experimental plots, which were Peat and Gypsum mixture, Wetting agents and Sand.Through the contrastive analysis of soil physicochemical properties, visual turfgrass quality,organizational elements of grass,and properties of the leachate sample,Finally we can determine the suitable water quality and management measures for green.the main conclusions as follows:(1) The analysis of irrigation waters showed that TR can be used for perpetual irrigation.However,the salt ionsN nutrient elements of SR is higher, if irrigatting golf green with SR for long time,we still need to strengthen the processing of its Ec、sodio、potassium ion、Total phosphorus、Ammonium nitrogen.(2) The soil conductivity was0.34ds/m,sodium ion was607.97mg/kg,potassium ion was15623.16mg/kg with SR irrigation,these soil chemical properties was significantly higher than TR irrigation and TW irrigation.In order to avoid causing harm to turfgrass,we need to monitor these indicators timely; As the contents of peat and gypsum mixture includes much calcium ions, magnesium ions,the contents of two ions were significantly increased to14809.23mg/kg and1395.66mg/kg when it was applied on soil;The other soil physical and chemical indicators did not change significantly.(3) After irrigating with SR, The dry weight of grass clippings was increased significantly and the content of sodium ion was significantly higher than irrigating with TR and TW, which reached to193.77mg/kg and231.95mg/kg.Irrigating golf green with SR for long time,sodium ion was accumulated in the grass organization, which might lead to salt damage.The other indicators of turfgrass did not changed significantly with recycled water irrigation and application of Peat and Gypsum mixture, Wetting agents and Sand.(4) After irrigating with SR,the EC, sodium ion, magnesium ion, calcium ion and three kinds of nutrient elements of leachate were all changed significantly,but the contents of these indicators did not exceeded the highest level of the surface water quality standard, so,surface water composition will not be changed with SR for a short time irrigation.Besides,soil porosity was increased by application of Peat and Gypsum mixture,which caused the rise of leaching.So the content of calcium ion in leachate sample was increased significantly reaching to125.96mg/l, but other indicators did not changed significantly.