Evaluation of foliar biostimulants and micronutrient complexes for improving tomato growth, yield, and fruit quality in Southeastern Kazakhstan
Aitbayev T. Aitbayeva A. Yertayeva Z. Petrov E. Zorzhanov B. Turegeldiyev B. Yeleuova E.
October-December 2025Federation of Eurasian Soil Science Societies
Eurasian Journal of Soil Science
2025#14Issue 4313 - 324 pp.
Tomato (Lycopersicon esculentum L.) is a vital horticultural crop in Kazakhstan, especially in the southern and southeastern regions, where yields often fall short of their biological potential. This study evaluated the effects of selected foliar-applied biostimulants and micronutrient formulations on vegetative growth, yield, fruit quality, and economic performance of tomato under the agroecological conditions of Southeastern Kazakhstan. The experimental design included seven treatments: six commercial products—Fitolaza, Nano Sulfur, Scudo, Calcium Humate, CompleMet-Tomato, and BioSok Energy—applied individually or in combination, alongside a non-treated control. All treatments improved vegetative parameters such as plant height, stem diameter, leaf number, and total biomass. The T3 treatment (Fitolaza + Nano Sulfur) consistently delivered superior performance across all growth stages and achieved the highest fruit yield (26.10 t/ha), representing a 31.49% increase over the control. T7 (CompleMet-Tomato) and T5 (Calcium Humate) also demonstrated notable yield improvements. Biochemical analyses revealed that these treatments enhanced dry matter, total sugar, and vitamin C content in fruits, while keeping nitrate levels below the permissible threshold. Economic evaluation identified T3 as the most profitable treatment (USD 1,932.99/ha), followed by T7 and T5, with profitability rates exceeding 140%. These results highlight the potential of foliar biostimulant strategies to enhance both productivity and profitability in tomato cultivation, offering a viable path toward more sustainable and resource-efficient horticultural practices.
biostimulant , economic efficiency , foliar fertilizer , fruit quality , Southeastern Kazakhstan , Tomato , yield
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LLP Kazakh Research Institute of Fruit and Vegetable Growing, Almaty, Kazakhstan
Regional Branch Kainar of LLP Kazakh Research Institute of Fruit and Vegetable Growing, Kainar, Kazakhstan
Kazakh National Agrarian Research University, Almaty, Kazakhstan
Korkyt Ata Kyzylorda University, Kyzylorda, Kazakhstan
LLP Kazakh Research Institute of Fruit and Vegetable Growing
Regional Branch Kainar of LLP Kazakh Research Institute of Fruit and Vegetable Growing
Kazakh National Agrarian Research University
Korkyt Ata Kyzylorda University
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