Ways to increase the survival rate of sweet sorghum plants in the conditions of Southern Step in Ukraine

UDC 633.17(477/7)

DOI: 10.31521/2313-092X/2019-2(102)-8

 

A. Chernova
O. Kovalenko
M. Korkhova
L. Antipova

 

        The article presents an analysis of the data on the effect of the studied factors on the growth and development of plants obtained in the phase of full ripeness of the grain. The varieties had a minimum survival rate of 74,9% in the Silo 700D and 77,1% in the Favorite, and in the Honey Hybrid – 78,5% and Troistiy – 77,6%, respectively. Plant survival during the period of full ripeness was significantly different depending on both the variety and the hybrid, and from other factors under study. This is due to the morpho-biological and physiological characteristics of varieties and hybrids, which contributed to better growth and development of plants, and ultimately led to an improvement in the photosynthetic apparatus of plants, which forms the productivity of the studied plants. The highest survival rates were noted with a planting density of 70 thousand units / ha in the variety Favorite and hybrids Honey with Troistiy. Thus, Honey hybrid in the control plots this indicator changed from 80,1 with a seeding density of 70 thousand units/ha to 78,7% with a planting density of 160 thousand units/ha, respectively. Only the variety Silo 700 D in variants without processing of plants with biopreparations and microfertilizers and seeding density 70, 130 and 160 thousand pcs/ha, the survival rate of plants was slightly lower compared with the control standing density of 100 thousand pcs/ha. The using for plants processing of Biocomplex-BTU and Kvantum microfertilizers contributed to an increase in survival rates for all varieties and hybrids. Thus, the variety Favorit, with a planting density 70 thousand pieces /ha, the survival rate of plants under the action of a biological preparations increased by 1,7%, a mix of microfertilizers – by 3,1%, a joint processing with a mix of preparations – on 3 times, compared with the control variant.

         Keywords: sweet sorghum, varieties and hybrids, seeding rate, biopreparations and microfertilizers, plant density and plant survival.

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