Sivak N. Improvement of agricultural method of gibberellin application in technology of cultivation of table grape cultivars

According to the results of the research, it was found that the soil and climatic According to the results of the research, it was found that the soil and climatic conditions of the Northern Black Sea region meet the biological requirements of the zoned cultivar “Flora” and promising cultivars of grapes “Talisman” and “Kishmish luchistii”. Rational doses of gibberellin are set, to a lesser extent lead to side effects, allow to obtain the maximum yield of marketable table grapes. The use of growth regulator in rational doses by spraying inflorescences increases the weight of a bunch of cultivars “Flora” by 63%, “Talisman” – 48%, “Kishmish luchistii” – 58%, the mass of 100 berries in bunch by 198% of “Flora” cultivar, by 35% – “Talisman”, by 31% – “Kishmish luchistii”. The indicatorі of the bunch structure and composition of berries increases on cultivars with functional-female type of flower, decreases - seedless cultivar. The reaction of plants to treatment with gibberellin depends on the level of crop yields: at low levels of productivity, the effect of growth regulator increases rSFetive to the weight of the crop. To achieve a balance between high levels of plant productivity and quality of table grapes, it is necessary to adhere to the ratio between the exposable leaf area and the weight of the crop at the level of 0.8 m2/kg. In experimental cultivars, the use of gibberellin has no negative impact on the maturation of the vine, no negative aftereffects. The use of gibberellin in the technology of growing table grapes in an optimized dose against the background of phyto operations on the rationing of plants by harvest increases the cost of production, compared with the reference dose, but due to the increased yield of marketable grapes, the level of profitability exceeds the standard by 56% on the “Flora” cultivar, 22% – “Talisman”, 257% – “Kishmish luchistii”.