Features of growth of sorghum [Sorghum bicolor (L.) Moench] plants depending on the width of rows and seeding rate in the conditions of the Right-Bank Forest-Steppe of Ukraine

Purpose. To establish the optimal row spacing and so­wing rate of sorghum seeds grain varieties ‘Dniprovskyi 39’ ‘Vinets’, to substantiate their influence on growing season biometric parameters plants in Right-Bank Forest-Steppe Ukraine. Methods. Field, laboratory, mathematical statistical. Results. The most intensive growth development was observed when sowing with a 45 cm seeding 200 thousand pieces/ha. In particular, duration under such conditions smallest: 108 days for variety 106 ‘Vinets’ variety. At same time, indicators field germination, plant height stem diameter were maximum experiment: – 88.7%, 137.3 1.7 cm, 86.9%, 121.8 1.6 respectively. It found that an increase reduced productive tillering, leaf area weight per plant. intense tillering at 150 pieces/ha all studied variants spacing: average, up two panicles well filled plant, depending varietal characte­ristics. 250 pieces/ha, both somewhat weaker 1.0–1.1 largest surface one cm: 1528–2320 cm2 169.2–185.6 g 1476–2180 143.1–162.3 planting density. Reduction 15 its 70 led decrease main development. Conclusions. Sorghum developed better sown which recommended crops