Effect Of Root Zone Drip Irrigation On Fruit Quality,Yield And Water Use Efficiency Of Cherry Tomato

In order to explore the high-yield and high-efficiency scientific irrigation system for cherry tomatoes grown in the solar greenhouse,the experiment adopted the root zone drip irrigation technology.By designing different irrigation frequencies,alternate frequencies,and upper and lower limits of irrigation,it studied the quality,yield and water use efficiency of cherry tomatoes.Impact.The experiment adopts a completely randomized block design.The spring stubble experiment design irrigation frequency is once every day(D1)2 days(D2),3 days(D3),and the alternating frequency is 1 side irrigation(T1),2 times(T2),3 times(T3)for the other side of irrigation,alternately.Autumn stubble experiment design A side irrigation upper and lower limits are A1(90%～65%),A2(80%～55%),A3(70%～45%),B side irrigation upper and lower limits are B1(85%～50%),B2(70%～40%),B3(55%～30%).The results of the study are as follows:1.The effect of alternate drip irrigation with root zone on the quality,yield and water use efficiency of cherry tomatoes(1)From the point of view of cherry tomato fruit quality,the vitamin C of treatment D2T3 was significantly increased by 4.49%compared with treatment D1T1,reaching 191.37 mg/kg;the soluble sugar content of treatment D1T3 and the sugar acid comparison treatment D1T1 were significantly increased by 20.25%and 21.33,respectively%;(2)From the perspective of cherry tomato fruit yield and water use efficiency,the average fruit quality,yield,and water use efficiency of treatment D1T3 were significantly increased by 17.76%,9.85%,and 9.85%,respectively,compared with treatment D1T1.(3)From a comprehensive point of view,the comprehensive evaluation of treatment D1T3(irrigated every day,one side is irrigated 3 times for the other side)is the best,and it is the optimal irrigation strategy under the condition of alternate drip irrigation in the divided root zone.2.Research on the upper and lower limits of irrigation for cherry tomatoes based on the water content of the substrate(1)From the point of view of cherry tomato fruit quality,treatment A3B1 had the highest vitamin C content and soluble solid content,which were 221.64 mg/kg and 7.87%,respectively.Treatments A3B2 and A3B3 had the highest soluble sugar content,both 5.07%.The sugar-to-acid ratio of A3B2 was the highest,being 7.77.(2)From the point of view of cherry tomato fruit yield and water use efficiency,lower irrigation upper and lower limits are not conducive to the formation of cherry tomato yield.Under the condition of Al,the equivalent yield of each treatment was higher than 74.96 t/hm2.Treatment A3B3 had the highest water use efficiency,which was significantly improved by 53%compared with treatment A1B1.Compared with treatment A1D1,the water use efficiency of treatment A1B3 and A1B2 was significantly increased by 28.10%and 53.00%,respectively.(3)Comprehensive consideration,the comprehensive performance of A1B3(90%～65%,55%～30%)treatment is better,which can provide decision-making basis for the cherry tomato moisture management in the solar greenhouse.