Fruit growing
and viticulture of South Russia

Annotation

Methods of defoliation and crop regulation in the vineyards of Merlot variety, growing in the Temryuk region are studied. Clones of grapes with a positive reaction to the agricultural practices are selected. Recom-mendations for production taking into account the results of study are given

Annotation

The article presents the results of research on the effect of foliar fertilizing of the technical grape variety Rkatsiteli with the organomineral fertilizer "Renovation of the Protection brand" on the yield and its quality. The purpose of the research was to establish the optimal application rate of the drug per 1 hectare of vineyard. The research was carried out in OAO AF "Yuzhnaya" of Temryuksky district at the Chernomorets branch on a grafted, fruit-ing, stemmed vineyard, with the formation of a two-sided horizontal cordon. The scheme of the experiment included three application rates of the drug per 1 hectare of vineyard � 1, 2 and 3 kg/ha. Control variant was without processing. Foliar fertilizing was carried out three times � in the phase of isolation of inflorescences and 15 days after the second and third. The flow norm of the working fluid was 800 l/ha. Records and observations were carried out according to generally accepted methods in viticulture. It was revealed that at all application rates of the fertilizer, there was a significant increase in the mass of the bunch, an increase in the yield from the bush and the yield capacity of plantings. However, the greatest excess of indicators compared to the control occurred at the application rate of the drug 1 l/ha, where the mass of the bunch increased by 17.8 %, and the yield from the bush and yield capacity, respectively, by 22.8 and 23.0 %. The sugar content in berry juice increased by 0.9 g/100 cm3 in this variant. The influnce of the use of non�root Fertilizers on the concentrations of the main indicators of the quality of wine materials was determined � the volume fraction of ethyl alcohol, mass concentrations of volatile and titrated acids, sulfur dioxide and the reduced extract, as well as pH. An increase in the reduced extract was found in all variants of the experiment. The application of foliar dressing did not fundamentally affect the concentration of organic acids. There was an increase in the tasting score by 0.2 points in the variant with the use of "Renovation of the Protection brand " in a concentration of 2.0 g/dm3