【摘要】 【目的】研究枸溶性钙镁肥对加工番茄果实钙、镁吸收及品质的影响，为石灰性土壤条件下枸溶性钙镁肥的施用提供理论依据。【方法】以加工番茄为材料，不施钙镁肥为对照（CK）,设3个钙镁肥用量：450 kg/hm²(C₄₅₀)、900 kg/hm²(C₉₀₀)、1 800 kg/hm²(C_{1 800})。测定果实的钙、镁含量、品质及脐腐病发生率，并对品质进行综合评价。【结果】施用枸溶性钙镁肥可显著促进果实对钙、镁元素的吸收，并提高吸收速率，降低脐腐病发生率。与对照相比，不同用量枸溶性钙镁肥均可提高单果重、颜色指数、果肉厚度、可溶性糖、VC含量并达到显著水平，硝酸盐含量显著降低。C_{1 800}处理下果实的糖酸比、果肉厚度、VC含量最高，分别比CK高55.01%、29.51%、18.86%,硝酸盐含量最低，脐腐病发生率分别比CK、C₄₅₀、C₉₀₀处理减少了37.43%、19.11%、8.63%。【结论】在石灰性土壤中施用枸溶性钙镁肥可显著促进果实对钙、镁的吸收，降低脐腐病发生率，提高加工番茄品质，以施用量为1 800 kg/hm²的效果最优。更多还原

【Abstract】 【Objective】 To study the effects of citric acid soluble calcium and magnesium fertilizer on calcium and magnesium absorption and quality of processing tomato fruit, so as to provide a theoretical basis for the application of citric acid soluble calcium and magnesium fertilizer under calcareous soil conditions.【Methods】 With processing tomato as experimental material and no calcium and magnesium fertilizer as control（CK）, three calcium and magnesium fertilizer dosage were set: 450 kg/hm²(C₄₅₀), 900 kg/hm²(C₉₀₀), 1,800 kg/hm² (C_1,800).After that, the content of calcium and magnesium, quality and the incidence of umbilical rot were determined, and the quality was evaluated comprehensively.【Results】 The application of citric acid soluble calcium and magnesium fertilizer could significantly promote the absorption of calcium and magnesium in fruits, increase the absorption rate and reduce the incidence of umbilical rot.Compared with the control, different ratios of citric acid soluble calcium and magnesium fertilizer could significantly increase the weight of single fruit, color index, pulp thickness, soluble sugar and VC content, and significantly reduce the content of nitrate.When the sugar acid ratio of fruits were under C_1,800 treatment, pulp thickness and VC content reached the highest, which were 55.01%, 29.51% and 18.86% higher than those of CK, respectively, and the nitrate content was the lowest.The incidence of umbilical rot was 37.43%, 19.11% and 8.63% lower than those of CK, C₄₅₀ and C₉₀₀, respectively.【Conclusion】 The application of citric acid soluble calcium and magnesium fertilizer in calcareous soil can significantly promote the absorption of calcium and magnesium by fruits, thus reducing the incidence of umbilical rot and improving the quality of processing tomato.To sum up, the effect of applying 1,800 kg/hm² is the best.更多还原