Abstract:
To study the response of grapes to canopy management under the Steppe
environment and to elaborate effective agrotechnics for non-irrigated cultivation. The research was conducted at the NSC „V.Ye. Tairov IV&W” experimental plots
from 2016 to 2020. Different horizontal vine cordon positions were tested in the experimental vineyard of wine grape cultivar `Aromatnyi`, with heights ranging from 0.4 m to 0.8 m, 1.2 m, and 1.6 m.
The weight of yield per vine (kg/vine) was determined during the grape harvest. The yield of the vineyard (t/ha) was calculated. Manual labor costs including grape harvest (man-hours) per hectare of vineyard and per unit of yield depending on variants of canopy management were calculated.
The highest yield was established at the position of the vine cordon at a height of 1.2 m with free-growing of shoots, and the minimum – at a height of 1.6 m with downward shoot positioning. The yield weight, on average for five years of research, at a cordon height of 1.2 m is 11.6 t/ha. Reducing the cordon height to 0.8 m reduced the productivity of vines by 13.8%, to 0.4 m – by 25.9%. A reduction of yield weight by 42.2% was observed when cordon height was increased to 1.6 m.
The total manual labor costs, including harvesting, can vary from 432 to 635 man-hours per production cycle, depending on vineyard canopy management.
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