The efficiency of chelated micronutrient fertilizers and their impact on the yield structure of grain sorghum varieties

The current paper has presented three-year data on the chelated micronutrient fertilizers of the “new generation” for grain sorghum crops grown in the arid conditions of the Saratov Right Bank. The primary purpose of the current study was to determine the impact of chelated micronutrient fertilizers on the yield structure of grain sorghum varieties and to establish the economic and production benefits of their use. To achieve this goal, there have been set the tasks to identify the effect of micronutrient fertilizers on the indicator of seed weight per panicle, to evaluate the effect of the products Reasil Micro Amino Zn and Reasil Forte Carb Ca/Mg/B-Amino on the trait ‘number of seeds per panicle’, to study the effect of the above-mentioned products on the trait ‘1000-seed weight’, to determine the economic effect of the use of micronutrient fertilizers in chelated form. The current study has established a significant impact of chelated micronutrient fertilizers on the analyzed yield structure elements. A one-liter dose of the product Reasil Micro Amino Zn on the varieties Asistent, RSK Lokus, and Kulon had a significant impact their trait ‘seed weight per plant’ exceeding the control by 27.3%, 56.9%, and 21.4%, respectively. When using the product Reasil Forte Carb Ca/Mg/B-Amino, the most responsive varieties were RSK Lokus and Kulon. On these varieties, all three doses showed significant differences in the trait, exceeding the control by 26.9% to 38.9%. These products were found to affect the trait ‘seed number per panicle’. The variety Garant was the most responsive to the fertilizers; both products and all doses tested were most effective on this variety. The differences from the control ranged from 46.9 to 63.7% and from 21.1 to 88.2%, respectively. There has been identified a significant effect of chelated micronutrient fertilizers on the increase of ‘1000-seed weight’. The most effective results were demonstrated by applying all studied doses of both products to the varieties Bakalavr and Prints, which demonstrated significant differences compared to the control, ranging from 4.5 to 17.2%. There has been found a profitability increase by an average of 40-50% when using fertilizers (in all studied dosages) in the grain sorghum varieties Bakalavr, Asistent, Lokus, Kulon, and Prints.

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