数字农科院2.0

Response of Tomato Quality Parameters to Water Deficit Under Soil Salinity and Simulation Based on Stem Water Potential

文献类型： 外文期刊

作者： Xianbo Zhang;Huanhuan Li;Hao Liu;Jinglei Wang;Xiaoman Qiang

作者机构：

关键词： fruit quality;model building;salt stress;water stress

期刊名称： Horticulturae

ISSN： 2311-7524

年卷期： 2025 年 11 卷 2 期

页码：

收录情况： SCIE（2025版）

摘要： Soil salinity and water deficit are important challenges for sustainable agricultural development in arid and semi-arid regions. While soil salinity and water deficits may result in lower crop yields, they may improve crop quality. The quantitative relationship between water–salt stress, crop yield, and quality is key to achieving stable yield and enhanced quality through the coordinated regulation of soil water and salt. The interaction between soil salinity and deficit irrigation on tomato quality needs to be further understood, and the model simulating the response of tomato quality to deficit irrigation under simulated soil salinity needs to be further optimized. In this study, a two-year experiment was conducted in northwest China consisting of combinations of three soil salinity levels (0 g, 3 g, and 5 g mixed salt added to 1000 g air-dried soil, respectively) and four water regimes relative to the field capacity (θf) (W0, W1, W2, and W3 refer to 95% θf, 80% θf, 70% θf, and 60% θf as the upper limit of soil water content, respectively). The responses of plant stem water potential (φ), fruit osmotic potential (φπ), fruit Na+ content, fruit fresh weight, fruit water content, total soluble solids (TSS), lycopene (Ly), soluble sugars content (SSC), and color index (CI) to the degree of water deficit and the stage of water deficit were analyzed under soil salinity. The results show that both soil salinity and water deficit significantly reduced φ, but there is no significant interaction. TSS, SSC, and CI are all significantly affected by soil salinity, degree of water deficit, and stage of water deficit, and there is a significant interaction between the degree of water deficit and soil salinity. Fruit fresh weight, TSS, Ly, SSC, and CI are all strongly correlated with φ, and the straight lines of regression of each index with φ are significantly affected by soil salinity content. Soil salinity significantly increased the Na+ content in the fruit, and water deficit significantly enhanced the effect of soil salinity on the Na+ content of tomato fruit. A functional model to simulate fruit quality was developed based on the response of fruit quality parameters to φ and the effect of fruit Na+ accumulation under the compound effect of soil salinity and water deficit. The validation results of the model show that this function model effectively simulates tomato fruit quality under the combined effects of soil salinity and water deficit, providing a theoretical basis for soil water–salt management in arid and semi-arid regions.

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