Effect of Different Irrigation Conditions on Yield and Soil Nutrients Movement of Greenhouse Tomato

In order to improve water and fertilizer use efficiency of greenhouse tomato and accelerate development process of modern agriculture.The effects of different irrigation modes on yield of greenhouse tomato,soil temperature,soil nitrate nitrogen,available phosphorus and nitrogen fertilizer use rate were studied with drip fertilization and flood irrigation fertilization.The results showed that drip irrigation fertilization could improve soil temperature 0.5~1.5℃,compared with flood irrigation fertilization,yield increased 4%~35% and nitrogen use efficiency increased 2%~17%.By comprehensive analysis of saving water,nitrogen use and yield,the most optimal treatment was that irrigation frequency was once every six days and irrigation quota was 180m3·hm-2.