Evaluation of the effect of foliar treatment with "Algae Super" preparation on the productivity and quality indicators of grapes

Представлены результаты исследования эффективности системы минерального питания на основе препарата «Алга Супер» (компания ООО «АгроБиоКом») в качестве внекорневой подкормки винограда, дана оценка её влияния на формирование урожайности и показателей качества винограда столового сорта Италия и технического сорта Ркацители. Применение экспериментальной системы внекорневых обработок способствовало увеличению урожайности сортов Италия и Ркацители на 30,1 % относительно контроля. Отмечено увеличение выхода стандартной продукции сорта Италия на 4,1 % по сравнению с контролем. При использовании препарата «Алга Супер» массовая концентрация сахаров увеличилась в среднем на 3,1 % (P = 2,59*10), на фоне уменьшения массовой концентрации титруемых кислот, на 6,0-6,5 % относительно контрольных вариантов. Общая дегустационная оценка винограда сорта Италия после обработок была выше контроля на 7,1 %. Возделывание винограда с применением препарата «Алга Супер» обусловило снижение себестоимости урожая сорта Италия на 22,8 %, сорта Ркацители - на 22,1%, на фоне увеличения рентабельности возделывания на 125,4 и 58,7 % соответственно. The results of the study on the efficiency of mineral nutrition system based on the preparation "Algae Super" ("AgroBioCom" LLC Company) as foliar treatment of grapes are presented, evaluation of its effect on the formation of grape productivity and quality indicators of table grape cultivar ‘Italia’ and wine grape cultivar ‘Rkatsiteli’ is given. Using of experimental system of foliar treatments contributed to an increase in the cropping capacity of grapevine cultivars ‘Italia’ and ‘Rkatsiteli’ by 30.1% relative to the control. An increase in the yield of standard products of the ‘Italia’ cultivar by 4.1% in comparison with the control was registered. When using the "Algae Super" preparation, the mass concentration of sugars has increased by an average of 3.1% (P = 2.59*10), against the background of a decrease in the mass concentration of titratable acids - by 6.0-6.5%, relative to the control variants. The overall tasting evaluation of the ‘Italia’ grapevine cultivar after treatments was 7.1% higher than the control. The cultivation of grapes when using the preparation “Algae Super” led to a decrease in the final cost of the yield of the cultivars ‘Italia’ - by 22.8%, and ‘Rkatsiteli’ - by 22.1%, against the background of cultivation profitability increase by 125.4 and 58.7%, respectively.

Quality Changes in Grape Berry as Affected by the Use of Different Colored Shade Nets Proposed to Alleviate the Adverse Effects of Climate Change

In Turkey, viticulture practices have displayed significant development with the production of high quality fresh grapes, juice, molasses and raisin. Grape berries contain high amount of phenolic compounds collected enormous interest due to their essential function in the improvement of produces attained from grapes, but also for their potential useful health effects as functional food. The purpose of present investigation was to reveal the effects of different colored shade nets on berry skin color and functional properties of grape juice. Four years old vines of ‘Alphonse Lavallée’ table grape were cultivated soilless in about 70 L black plastic pots containing sterile peat and perlite mixture under controlled glasshouse condition. The grapevines were covered with different colored shading nets (yellow, blue, white, red, green and black) at the beginning of the summer period. At commercial maturity, investigations show that berry skin color and the analyzed biochemical features of ‘Alphonse Lavallée’ table grape cultivar displayed great variations in response to the different colored shade net. Such differential effects should be evaluated when the use of shade nets is considered in protected viticulture to cope with environmental constraints. The findings may also be useful for the future experiments under conventional vineyard conditions.