Photosynthetic productivity of sorghum (Sorghum bicolor L. (Moenh) in the conditions of the Right-Bank Forest-Steppe of Ukraine

Sorghum (Sorghum bicolor L. (Moenh) is a technical, food, and fodder crop can be used for various purposes, given its value, the acreage should substantially expanded in Ukraine, elements of cultivation technology thoroughly examined. The purpose study was to determine effect growth regulator on photosynthetic productivity sorghum conditions Right-Bank Forest-Steppe Ukraine. following methods were study: field, measuring weighing, mathematical, statistical. conducted unstable moisture Ukraine 2016-2019. Based results study, it determined that use plant affected productivity, namely, leaf surface area, potential net photosynthesis productivity. indicators content chlorophylls changed. Thus, assimilation area leaves reached maximum with seed treatment spraying crops amounted 8.56 thousand m2 /ha during tillering period, period stem elongation – 29.6 /ha, flowering full ripeness 40.32 4.97 /ha. Net control lowest 4.67 g/m2 , seeds contributed increase by 0.27 0.79 . With crops, highest 6.12 sum a+b had rates tasselling and, depending experiment options, ranged from 4.36 5.35. yield grain biomass also varied preparation, version (7.1 35.9 t/ha). close relationship between determined. contribute widespread regulators ensure development plants, yields