Fruit growing
and viticulture of South Russia

Annotation

Most of the widespread grape varieties belonging to the European species Vitis vinifera L. are not highly resistant to environmental stress factors. On the contrary, American species are characterized by immunity to many pathogenic organisms, and are also able to grow under the influence of various abiotic stresses. Thus, the use of scion-rootstock combinations, where resistant varieties of American grape species act as a rootstock, makes it possible to increase the production and adaptation potential of a more susceptible scion. This work presents the results of a three-year study of the influence of scion-rootstock combinations of grapes on the resistance of grape plants to abiotic stress factors in the summer period in the conditions of the North-Western Ciscaucasia. Two varieties � Kishmish vengerskiy and Kishmish luchistyi � were studied on rootstocks Ferkal and Paulsen, as well as own-rooted plants. To assess the adaptive potential of grapes, the physiological and biochemical parameters of the leaves were analyzed, namely, the water regime, chlorophyll content and the level of electrolyte leakage. The weather conditions were obtained from a stationary weather station in the grape growing zone. The results showed that the scion-rootstock combinations Kishmish vengerskiy - Paulsen and Kishmish luchistyi - Paulsen are characterized by the highest values of the water and chlorophyll content in the leaves. The weather conditions of the summer period during three years were characterized by the presence of extremely high air temperatures and insufficient amount of moisture compared to long-term averages. To such conditions, the grafted forms of varieties Kishmish luchistyy and Kishmish vengerskiy proved to be the most adapted than own-rooted control plants. The obtained data allow to conclude that it is expedient to use the Paulsen rootstock for Kishmish luchistyy and Kishmish vengerskiy varieties in the conditions of the North-Western Ciscaucasia in order to increase the adaptive potential of these varieties to the stress factors of the summer period.

Annotation

Currently, due to the active development of viticulture and the expansion of the assortment of cultivated varieties, the current direction of research is the study of promising genotypes and the assessment of the impact of agrotechnical techniques on the productivity and quality of finished products. The purpose of the research was to study the effect of the load of bushes with shoots on the productivity, quality of grapes and wine from the Granatovyi variety growing in the conditions of the Black Sea zone of the Krasnodar region (Subzone 2). The studies were conducted in 2020-2022. The field experiment included three experimental variants of loading bushes with shoots 1) 100,000 shoots/ha; 2) 120,000 shoots/ha; 3) 140,000 shoots/ha. It is established that the fruitfulness coefficients decrease with an increase in the load of bushes with shoots, and an increase in the number of inflorescences occurs due to an increase in the number of shoots. The productivity of Granatovyi grape variety ranged from 4.7 to 5.0 kg per bush. It is noted that with an increase in the load of bushes with shoots, the range of fluctuations in the mass concentration of sugars increases from 2.2 g/100 cm3 to 3.5 g/100 cm3 . The samples of dry wines in bulk (wine materials) with a load of 120,000 shoots per hectare had the greatest stability of the tasting assessment over the years � the fluctuation interval was no more than 0.2 points. For the Granatovyi grape variety in the conditions of the Black Sea zone of the Krasnodar region (Subzone 2), a load of 120,000 shoots per hectare (36 shoots per bush with a planting scheme of 3.0x1.0 m) is recommended to ensure the receipt of 4.8 kg of high-quality grapes from the bush and the production of wine materials with a tasting score of 8.2 points.

Annotation

The article presents the results of agrobiological and physiological-biochemical studies to ensure the stability of grape plantations in unstable weather conditions and anthropogenic intensification of production. Studies in the agroecological conditions of the Krasnodar region on the southern chernozems revealed the most productive norm of loading of grape bushes with shoots for the technical varieties Kurchanskiy, Dmitriy, Vladimir, Granatovyi, Antaris and Alkor, on leached chernozems � for the table seedless variety Centennial Seedless. According to the results of electrophoretic separation of peroxidases in polyacrylamide gel and an increased content of ascorbic acid, increased frost resistance was established in the varieties Kristall, Vostorg, Krasnostop AZOS. The Vostorg and Zarif varieties proved to be more adaptive to the stresses of the summer period in terms of leaf hydration, bound water content, the ratio of chlorophylls and carotenoids, the amount of proline and water-soluble sugars, membrane permeability. The role of physiologically active substances in increasing the adaptive potential of grape plants has been established. The treatment of Merlot vines with methyl jasmonate and epibrassinolide during deep dormancy period, as well as proline, salicylic acid and epibrassinolide during induced dormancy period had a positive effect on the condition of the vine: there was a decrease in electrolyte yield. Sustainable grape cultivation is achieved with the systemic use of the �Bioconcentrate-Z� effluent by the non-root method. Against the background of nonroot treatments of Merlot and Cabernet Sauvignon varieties, a higher level of plant water supply, an increase in potassium content, green pigments, organic acids and grape yields were established. Physiologically active compounds and the preparation Turinbash have a positive effect in intensive own-root plantations of native and promising introduced grape varieties against the background of phylloxera infection in the southern part of Dagestan. The created yield forecasting method based on the NDVI of the grape plant and the actual data of multispectral images of the phenophases of flowering and growth allows to increase the accuracy of the calculated yield capacity to the actual one with a deviation from 0 to 0.8 kg per bush, the accuracy of the forecast increases by 2 times by the end of the growth phase and by the beginning of the maturation phase.