Fruit growing
and viticulture of South Russia

Annotation

Studies of the introduced German technical Monarch grape variety were carried out in the Black Sea agro-ecological zone of viticulture in the Krasnodar Territory. In unstable weather conditions, the duration of the growing season from blooming buds to the full physiological maturity of grape berries was 135 days in 2018, and in 2019 was 125 days. The variety showed the signs of an adaptive response to changing weather conditions. With an acute deficit of precipitation and a slow increase in air temperature in 2018, the duration of the second phase of the vegetation from the beginning of bud blooming to the beginning of flowering was 11 days longer. The significant difference in the duration of the second and third phases of vegetation is explained by the adaptive reaction of the introduced variety to lower air temperature in late May and early June in 2018. The difference in average daily air temperature during the period of active shoot growth and at the beginning of flowering reached 4.6 ºC, the amount of precipitation was 4.3 times less, that promoted the accelerated ripening of grapes in 2018. The maximum air temperature on average during the ripening period of grape berries was equal to 33 º � in 2018, and 31 º� in 2019. The amount of precipitation was 3.3 times less than normal. The high adaptive reaction of the technical Monarch grape variety is of great practical importance for use in scientific purposes and in industrial production when creating the stable ampelocenoses in unstable weather conditions of Southern Russia.

Annotation

Study of phenology of universal grape variety Podarok Dmitria were carried out in the Black Sea agroecological zone of viticulture in the Krasnodar Territory. According to the data of research the variety shows the signs of earlymedium ripening and adaptive response under unstable weather conditions in the temperate continental climate of Southern of Russia. The signs of adaptation of this variety were most manifested during the ripening period of grape berries. The duration of the ripening period of grape berries in atypical weather conditions in 2018 was 17 days, 13 days less than in 2019. The accelerated ripening of grape berries was promoted by high solar insolation and an acute deficit of precipitation. The average daily air temperature in this period in 2018 was 3.5 �C higher than in 2019 and 1.8 �C higher than the average long-term norm. The amount of precipitation in 2018 was 13.5 times less than in 2019, 7.8 times less than the norm and amounted to 3.7 mm. In 2019, the low air temperature at the beginning of the growing of studied grape variety compared to 2018 contributed to a restrained bud opening, growth of shoots and inflorescences. A sharp warming in late May-early June contributed to an earlier start of plant flowering. The low temperature in the second half of the growing season compared to 2018 and the average longterm norm slowed down the physiological processes and made longer the periods of growth of grape berries.

Annotation

The reaction norm of the introduced wine grape variety Merlot in unstable conditions of the moderately continental climate of the south of Russia has been established. The research was carried out in the agroecological conditions of the Black Sea viticulture zone of the Krasnodar region in the industrial vineyards of the GC �Abrau-Durso� using modern methods of field research. Agrobiological accountings were carried out using the methods of agrotechnical study of grapes. The climate at the research areais moderate continental. The average annual air temperature is 14.1 ºC, during the growing season (May � September) is 22.2 ºC, the maximum rises to plus 37.0 ºC, the minimum during the wintering period of grapes falls to minus 19 ºC. The annual amount of atmospheric precipitation is 544 mm, during the growing season � 208 mm, during the active growth of grape berries (II. June-III. august) � 96 mm. The grape plant reacts with the modification variability of phenotypic traits to the variation of environmental conditions. The lower limit of the modification variability of the cluster mass is 98 g and the upper limit is 121 g., the grape yield is 3.3 kg/bush and 6.8 kg/bush, the sugar content of the grape berries juice is 20.1 g/100 cm3 and 21.6 g/100 cm3 . The reaction norm is 23 g, 3.5 kg/bush and 1.5 g/100 cm3 , respectively. Against the background of the application of fertilizers, the lower and upper limits of the modification variability increased respectively: the cluster mass by 16 % and 9 %, the grape yield by 48 % and 16 %, the sugar content of the grape juice of by 10 % and 7 %. The reaction norm decreased: reduction for the cluster mass as phenotypic trait was 22 %, for the grape yield � 14 %, and for the sugar content of the berry juice � 67 %.

Annotation

The most important technique of agricultural technology to increase the productivity and quality of grapes is pruning of bushes, the length of which depends on the most productive zone of shoots. To determine the zone of the greatest production of the shoot, the embryonic fruitfulness of the buds is estimated, depending on the biological characteristics of the grape varieties and agroecological factors of the location, both natural (weather and climatic, soil and spatial conditions) and anthropogenic (management system, pruning, fertilizer use, etc.). In 2018, we studied the special aspects of inflorescences formation and differentiation of new table grapes hybrid forms of E.S. Gusev breeding (Volgograd) under the arid and hot conditions of the Volgograd. Territory in this work research results are presented of the embryonic fruitfulness of the new table grapes hybrid forms of Ispolin, Courage, Hamlet, Valencia, Artek, Timothy in the Krasnodar Region. The study of embryonic fruitfulness was carried out in the vineyards growing in the agroecological conditions of the Krasnodar Region Central Zone, subzone � 4. Selection of the studied shoots and assessment of the embryonic fruitfulness of buds under winter were carried out during the period of deep physiological rest of plants by microscopy (Micromed MS1) in the laboratory of NCFSCHVW. The regularity of different laying and differentiation of embryonic inflorescences in the studied grapes hybrid forms, as well as differentiated coefficients of fruitfulness and fruiting along the length of shoots are established. The highest rates of fruiting and fruitfulness were in the grape hybrids of Hamlet, Artek and Timothy under the conditions of temperature stress, the highest embryonic productivity was observed in the zone 6-8 wintering buds.

Annotation

The article presents the results of assessing the physiological state of new self-rooted hybrid forms of table grape Akello, Artek, Valencia and Courage growing in the Krasnodar Territory in the summer period. The cultivar Livia of Russian selection was selected as a control. Artificial drought was simulated in a laboratory conditionS. After stress effect, the following physiological parameters of grape leaves were analyzed � the degree of damage to cell membranes (based on the content of malondialdehyde, one of the products of lipid peroxidation of cell membranes), the relative water content, the quantum yield of the photochemical reaction of photosystem II, the content of chlorophyll a and the ratio of a/b chlorophylls. It was found that the most depressed month for the studied grape plants was July. This is evidenced by the averaged indicators of studied grape plants according to the analyzed parameters � low values of photosynthesis and relative water content in the leaves and increased level of malondialdehyde, which determines the intensity of the development of oxidative processes by the influence of negative factors. The greatest adaptive potential in this month was revealed in the Artek hybrid form, which had high value of photosynthesis and a low level of malondialdehyde content. In August, the hybrid forms of Artek and Courage were characterized by high values of the relative water content in the leaves and low value of malondialdehyde, and besides the level of chlorophyll a fluorescence (quantum yield) did not change compared to July. The hybrid Valencia form had the highest value of malondialdehyde and the lowest value of relative water content during the summer period, which makes it the least resistant form among the studied. The hybrid form of Artek was identified as the most resistant form to influence of summer stress factors in the territory of Krasnodar region. Further, this form can be recommend for the creation of stable ampelocenoses.