Effects of Water and Fertilizer Integration on Yield and Quality of Tomato Planting in Yellow Sand Substrate

【Objective】 This project aims to verify the advantages of yellow sand substrate and tomato planting effect, explore the influence of water and fertilizer integration technology on the yield and quality of greenhouse tomato in the hope of improving the water and fertilizer utilization efficiency and solving the shortage of cultivated land, thus providing technical support for the agricultural construction of desert oasis in Northwest China. 【Methods】 The experiment selected and used three tomato strains F₁ of 1812, 1814, and 1867 as test materials. Tomato seedling grew up in planting bag which was filled with yellow sand substrate and management used a water-fertilizer integrated system. Greenhouse tomato yield and quality parameters were statistically analyzed, and the membership function was used to comprehensively evaluate the 3 tested tomato strains inner quality, and finally it showed that planting bag cultivation with water-fertilizer integrated system had its the advantage and feasibility for tomato in yellow sand substrate growth. 【Results】 The results showed that the actual yields of the 3 Shijia tomato strains covered from 134.0 to 146.3 tons per hectare, all of which reached the high-yield level for greenhouse tomatoes. The inner quality of the tomato was at the middle or high levels, and the sugar-acid ratio was above 7.71, which was very suitable for fruit tomatoes. Shijia 1812 had the highest inner quality among the 3 tomato strains evaluated through comprehensive characters by fuzzy mathematics. 【Conclusion】 As an alternative substrate for tomato planting, the bag-type yellow sand substrate can reduce the incidence of soil-borne diseases and secondary salinization.