Research of tomato economical irrigation schedule with drip irrigation under mulch in greenhouse

Taking the greenhouse tomato with drip irrigation under plastic mulch as experimental material, the suitable temperature, water stress index and dry matter transformation factor for tomato growth model were determined, and the economic irrigation schedule was accordingly made. The results show that the economic irrigation schedule can significantly increase yield and income. The yield increased by 11.6% and the benefit increased by 17.7%, the irrigation amount decreased by 6.6%The fluctuation range of soil moisture content (0-60cm) before irrigation was much smaller than that of the crop growing period. So the average value of soil water content before irrigation is used as the irrigation low limit for crop economical irrigation, and the value is 0.216 (relative water content is 82.9 %) for the greenhouse tomato, and the coefficient of variation is 0.80 %. According to the irrigation low limit, the irrigation benefit of the unit area of tomato with drip irrigation under plastic mulch in greenhouse can be the best.