Sorghum grain yield and energy efciency under different crop care measures

Abstract

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.