Fruit growing
and viticulture of South Russia

Annotation

The degree of laying and development of embryonic fertility in the overwintering central buds depends on the grape variety, its genetic characteristics and ecological and geographical origin. The purpose of our research was to study the influence of growth regulators on the laying of embryo inflorescences along the length of the annual shoot of the Solaris, Bianka, and Pervenets Magarach grape varieties. Treatment by gibberellin and micefit was carried out twice in three concentrations of 1.10 and 100 mg / l: before flowering and during post-fertilization. On the basis of the data obtained, the coefficients of fruiting (K1), fruitfullness (K2), and productivity (Kp) of the central overwintering buds along the length and three buds levels of the annual shoot were calculated. It was determined that treatment of Solaris variety by gibberellin stimulated an increase in the fruiting coefficient at the 5th level. When applying micefit at a concentration of 10 mg / l in both periods of treatment, the maximum value of this indicator was noted at the level of the 6th (1.74) and 4th (2.03) nodes, respectively. In Bianca variety the use of micefit in a lower concentration during both treatment periods increases in the fruiting coefficient at the level of the 9-10th node (1.68-1.70). The use of tested growth regulators led to an increase in productivity coefficient. Its maximum value was determined in the treatment option during the post-fertilization period of the Solaris variety by micefit (10 mg / l) at the level of the 4-7th node (1.21), which is 1.5 times higher than in the control. In the variety Pervenets Magarach the best value of the productivity coefficient was noted in the variant of treatment by micefitin of a lower concentration. The use of growth regulators of gibberellin and micefit in the tested concentrations allows to reveal more the biocapacity of the embryonic fruiting of the overwintering buds of each studied grape variety.