Study of the optimal terms of planting and plant feeding areas of domestic varieties of tobacco under cultivation in the central part of the forest-steppe of Ukraine
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Випуск №92. Частина 1
The article presents the research results of studу the optimal terms of planting and feeding areas of domestic varieties of tobacco for cultivation in the agro-climatic conditions of the central part of the forest-steppe of Ukraine.
It is established that the best period of planting tobacco plants in open soil is the second decade of May. At this time, the yield of tobacco raw materials is 30-40 % higher compared to the planting in the third decade of May. In terms of individual varieties Ternopilsky 7, Ternopilsky 14, Tempe 321 and Virginia were the most productive. Their productivity ranged from 2.28 t / ha to 3.73 t / ha. The yield indicators of these varieties are mainly due to higher plant height and large leaf size. Their leaves were characterized by more friendly maturation, which makes it possible to harvest in a shorter time. Planting of tobacco plants in the first decade of June, in the agro-climatic conditions of the central part of the Forest-Steppe of Ukraine, is inadvisable due to the incomplete ripening of the middle and upper tiers of the leaves and, accordingly, their low yield.
Plants of the tested varieties reacted differently to the area of feeding. With a feed area of 0.12 m2, the Ternopilsky 7, Tempe 321 and Virginia varieties were characterized by the highest yield of tobacco leaves, respectively, at a feeding area of 0.18 m 2 - Ternopil 7, Virginia and feeding area 0.21 m2 - Virginia. Taking into account the complex manifestation of the most important associated quantitative and qualitative characteristics, the optimum area of nutrition for tobacco plants in agroclimatic conditions of this zone is 0.18 m2 with a planting scheme of 0.6 x 0.3 m.
The most adapted for cultivation in agro-climatic conditions of the central part of the forest-steppe of Ukraine are varieties of tobacco Virginia, Ternopil 7, Ternopil 14 and Temp 321.
tobacco, varieties, planting schemes, feeding area, terms of planting, productivity.