Abstract The existing version of the VegSyst model (V2) simulates daily dry matter production (DMP), crop evapotranspiration (ETc) and crop N uptake of tomato and other vegetable crops grown in greenhouse in SE Spain. In this study with greenhouse tomato, (i) the VegSyst model was adapted to simulate daily values of seasonal (i.e. throughout the crop) uptake of K, P, Ca and Mg, (ii) the simulation of seasonal N, K, P, Ca and Mg uptake was validated, and (iii) the simulation of seasonal uptake concentration (UC) of N, K, P, Ca and Mg was validated. For K, P, Ca and Mg, dilution curves (i.e. relationship of crop content of the nutrient (%) to DMP) were obtained from pooled data of six treatments from two greenhouse tomato crops. These relationships were all described by power equations with R2 values of 0.72–0.92 for all nutrients, except Mg that had a R2 of 0.40. For the simulation of tomato crop N uptake, the dilution curve previously used in V2 was replaced by the critical N curve for tomato of Padilla et al. (2015). The simulation of uptake of N, K, P, Ca and Mg was validated with a spring, soil-grown, long-life type, tomato crop (Tomato-11) and two long season soilless cherry tomato crops (Cherry-16 and Cherry-17). Seasonal uptake of N, K, P and Ca was adequately simulated in the three validation crops, with best performance (Relative Error (RE) ≤0.2) in the Cherry-17 crop. In the three validation crops, modelling of Mg uptake had poor performance. For simulation of UC in the two cherry tomato crops, there was good performance for N, K, P and Ca in Cherry-17, and reasonable to good performance in Cherry-16. The simulation of the UC for Mg was poor. The revised VegSyst model, identified as V3, will be incorporated into a decision support system (DSS) to provide recommendations for nutrient solution composition for soil-grown and soilless tomato crops grown in greenhouses.

中文翻译：

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使用 VegSyst 模型模拟温室番茄的氮、磷、钾、钙和镁吸收以及吸收浓度

摘要 现有版本的 VegSyst 模型 (V2) 模拟了西班牙东南部温室中种植的番茄和其他蔬菜作物的每日干物质产量 (DMP)、作物蒸发蒸腾量 (ETc) 和作物氮吸收。在这项关于温室番茄的研究中，(i) VegSyst 模型适用于模拟 K、P、Ca 和 Mg 的季节性（即整个作物）吸收的每日值，(ii) 季节性 N、K、P 的模拟， Ca 和 Mg 的吸收得到验证，并且 (iii) N、K、P、Ca 和 Mg 的季节性吸收浓度 (UC) 的模拟得到验证。对于 K、P、Ca 和 Mg，稀释曲线（即作物养分含量 (%) 与 DMP 的关系）是从来自两种温室番茄作物的六种处理的汇总数据中获得的。这些关系都由幂方程描述，所有营养素的 R2 值为 0.72-0.92，除了 Mg 的 R2 为 0.40。为了模拟番茄作物氮吸收，V2 中先前使用的稀释曲线被 Padilla 等人的番茄临界氮曲线取代。(2015)。N、K、P、Ca 和 Mg 吸收的模拟通过春季土壤生长型长寿命型番茄作物 (Tomato-11) 和两种长季无土樱桃番茄作物 (Cherry-16 和 Cherry -17）。在三种验证作物中充分模拟了 N、K、P 和 Ca 的季节性吸收，在 Cherry-17 作物中表现最佳（相对误差 (RE) ≤0.2）。在三种验证作物中，镁吸收的建模表现不佳。对于两种樱桃番茄作物的 UC 模拟，Cherry-17 中 N、K、P 和 Ca 的性能良好，Cherry-16 中的性能良好。对 Mg 的 UC 模拟很差。