The results of research on the peculiarities of grain sorghum yield formation and its energy efciency depending on the use of microfertilizers and plant growth regulators in conditions of unstable moisture in the right-bank Forest-Steppe are shown in the article. The aim of the research was to identify the influence of elements of the technology of growing early-ripening grain sorghum hybrids on the productivity and energy efciency of the crop. During 2019–2021, research was conducted in the research feld of the training and production center of Bila Tserkva National Agrarian University. It was found that the most favorable conditions for the realization of the biological potential of the culture were in 2021, when the average experiment was 9.89 t/ha, compared to 2020 – 5.39 t/ha. It was found out that the best grain yields in the cultivation of Brigga sorghum hybrid were obtained with the use of foliar fertilizer with micro-fertilizer Alpha-Grow-Extra combined with Stimpo growth regulator – 7.71 t/ha. However, for the cultivation of Yutami sorghum hybrid, on the variant of application of foliar fertilizer with alpha-Grow-Extra microfertilizer, in combination with both growth regulators, the yield was 8.89 and 8.88 t/ha. It was determined that the best indicators of energy collection with grain in the cultivation of Brigga sorghum hybrid were obtained on the variant of foliar fertilization with microfertilizer Alpha-Grow-Extra, 2 l/ha in combination with Stimpo growth regulator – 116.72 GJ/ha. And for the cultivation of Yutami sorghum hybrid on the variant of application of foliar fertilizer with micro-fertilizer Alpha-Grow-Extra, in combination with both growth regulators, the minimum difference and maximum energy collection was obtained – 134.58 and 134.39 GJ/ha. Key words: grain sorghum, hybrid, growth regulator, microfertilizer, yield, energy efficiency.
The article presents the results of research on the economic evaluation of the effectiveness of growing grain sorghum under the complex influence of the elements of growing technology in the conditions of unstable moisture in the forest-steppe of the Right Bank of Ukraine. The purpose of the research was to determine the economic evaluation of the effectiveness of growing grain sorghum under the complex influence of technology elements. The experiment was carried out during 2019–2021 in the conditions of the research area of the educational and production center of Bila Tserkva National Agrarian University using various methods, namely: computational and statistical. To calculate the basic costs, we used technological maps of growing grain sorghum, which are used by producers in the conditions of the Kyiv region. Also, when determining costs, we relied on the indicators of the control variants of grain sorghum of the various hybrids we studied. It was found that the higher costs for grain sorghum cultivation technology amounted to UAH 5,149.9, for a yield of 7.88 t/ha, while for a yield of 6.65 t/ha it was UAH 5,067.1. It was recorded that a higher profit was obtained on the option of foliar fertilization with microfertilizer Alpha-Grow-Extra, 2 l/ha (1 treatment of 5 leaves, 2 – 9 leaves, 3 – throwing out panicles) in combination with Stimpo growth regulator, 20 ml/ha in phase 5 leaves for the cultivation of the Brigga sorghum variety – 39,638 UAH/ha. Under the condition of cultivation of the Yutami variety on the option of foliar fertilization with microfertilizer Alpha-Grow-Extra, 2 l/ha (1 treatment of 5 leaves, 2 – 9 leaves, 3 – throwing out panicles) in combination with Stimpo growth regulator, 20 ml/ha in phase 5 of leaves, a profit of 48,550 UAH/t was obtained, and with the similar use of microfertilizer and growth regulator Regoplant, 50 ml/ha in the phase of 5 leaves, it was 48,622 UAH/t. Key words: grain sorghum, economic assessment, basic costs, yield, profit.
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