Effects of Saline Drip Irrigation in Different Periods on the Growth and Quality of Tomatoes in Coastal Saline-Alkaline Soil

Tomato variety ‘Nunem 1618’ was used as test material, and 6 different concentrations of salt water(0.3,2,3,5,7,9 g·L^-1) drip irrigation were carried out during the earier, middle, and later periods of tomatoes, the influence of salt water irrigation on tomato yield and quality in different periods were stuided, in order to provide a data support for the salt water irrigation system of tomatoes in saline-alkali land facilities.The results showed that using ≤5 g·L^-1 salt water drip irrigation during the earlier period, tomato yield and single fruit weight were not significantly reduced compared with the control, but the 7,9 g·L^-1 treatments reached significant levels.There were no significant difference between the treatments of ≤9 g·L^-1 salt water drip irrigation at the later period compared with the control, but the single fruit weight was significantly reduced during the middle period.The salt water drip irrigation increased the vitamin C and organic acid content in the earlier and middle periods, but reduced the vitamin C content in the later period, and the hardness of the fruit increased in the earlier and later periods.The soluble solids content of the fruit increased of each treatment.According to the different periods of the tomato, the proper concentration of salt water drip irrigation could be used to achieve the purpose of maintaining yield and improving quality in coastal saline-alkali areas where the soil salt content was less than 0.3%.