Influence of Soil-Delivered Micronutrients (Iron and Zinc) on Soybean (Glycine max (L.) Merr.) Agronomic Performance and Quality under the Ecological Conditions of Central Anatolia, Türkiye

Authors : İrfan Özer

Pages : 99-108

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Publication Date : 2025-12-31

Article Type : Research Paper

Abstract :This study was carried out over a two-year period to evaluate the effects of soil-supplied iron (Fe) and zinc (Zn) on the agronomic traits and quality of soybean (Glycine max L.) under the ecological conditions of Central Anatolia, Türkiye. The study utilized the early-maturing Atakişi cultivar, which is well-adapted to the Central Anatolian and Mediterranean regions. FeSO₄·7H₂O (1.5 kg/da) and ZnSO₄·7H₂O (3 kg/da) fertilizers were incorporated into the soil prior to sowing. A randomized complete block design was utilized in the study, comprising four treatments (Fe, Zn, Fe+Zn, and control) with four replications, resulting in a total of 16 plots. Key agronomic parameters (such as branch number per plant, plant height, first branch height, first pod height, pod number per plant, seeds per pod, pod length, 1000-seed weight, and yield per decare) were measured alongside quality traits, including protein, ash, and oil contents (%). The findings demonstrated that soil applications of Fe and Zn significantly affected plant height number of branches (p 0.05). The Fe+Zn treatment resulted in the highest protein content (37.59%), the Fe treatment produced the highest oil content (19.80%), and the greatest ash content (9.10%) was observed in the Fe+Zn treatment during the second year. Overall, combined Fe and Zn applications enhanced both seed number and quality-related traits. It was concluded that such applications can significantly enhance yield and quality in soybean cultivation, especially on micronutrient-deficient, calcareous, and alkaline soils.
Keywords : Soya fasulyesi, demir, çinko, kalite, verim

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