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Features of growth and development of grain sorghum plants in the Right-Bank Forest-Steppe of Ukraine

Grain sorghum is one of the most highly productive multipurpose grain crops for food, feeding and technical purposes. Considering this, the research of the elements of the technology of grain sorghum growing is expedient and high-potential. The article presents the research results of the influence of the sowing time and the depth of planting seeds on the phenological observations, field germination of seeds, biometric indicators of sorghum plants of the grain varieties Dniprovskyi 39 and Vinets in the Right-Bank Forest-Steppe of Ukraine. The aim of the research is to establish the optimal sowing time and the depth of planting seeds of the grain sorghum varieties, to substantiate their influence on the characteristics of plant growth and development in the conditions of the RightBank Forest-Steppe of Ukraine. The research was conducted during 2016–2020 in the conditions of the Bilotserkivska RAS of the Institute of Bioenergy Crops and Sugar Beet of the National Academy of Sciences of Ukraine. It is proved that the sowing time and the depth of seeding have a significant impact on the growth and development of the grain sorghum plants. It is established that at the 1st decade of May and to the planting depth of 4–6 cm the grain sorghum seeds vegetative season reduces and equates 108 for the Dniprovskyi variety, and 105 days for the Vinets variety. Sowing seeds at the 3rd decade of April and the 2nd decade of May, as well as decreasing the planting depth to 2 cm and increasing to 8 cm, lengthens the grain sorghum vegetative season of the researched varieties. Field germination reached its maximum in grain sorghum seeds sowing at the 1st decade of May and to the planting depth of 4–6 cm and equals to 84.2–86.8 % for the Dniprovskyi 39 variety and 83.1–85.4 % for the Vinets variety. Biometric indicators that affect the formation of crop productivity, namely, plant height, bushiness, stem diameter, were maximum in the same variant of the experiment.

Key words: grain sorghum, varieties, sowing time, seeding depth, phenological observations, biometric indicators.

 

Pravdyva L. https://orcid.org/0000-0002-5510-3934


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AGROBIOLOGY №2 2020