Volkanov N. Agrobiological evaluation of the new grape varieties under conditions of the Zaporozh'ie pedoclimatic zone

Research object: Method for soil dressing of grapevine. Research objective: The effects of phenyl alanine alone, mineral fertilizers (NPK), superhumisol alone and in combinations during the localized application while using a hydraulical borer and against different soil treatments on biometrical indices of vines, the pat-tern of the root system development, yielding capacity, and quality of the fruit and wine in cvs Sukholimanski belyi and Cabernet Sauvignon. Methods: field and laboratory methods to study varieties; refractometric method to determine sugar content; method of direct titration to determine acid content. Theoretical and prac-tical results: The method developed for applying biologically active substances (BAS) while using a hydraulical borer enables localized application of these sub-stances so that they are best utilized by the root system of grape plants, which re-sults in a higher root weight. Optimum parameters of the new method for soil dressing while using a hydraulical borer were established: against plowing in au-tumn or in spring after plowing renewal three times over the vegetation period: in the beginning of budbreak, 1-2 days before flowering and after berry set at a pea size of the berry, with optimum concentrations of BAS and mineral fertilizers of 0.003% (when phenyl alanine was applied) and of 160 g of the active ingredient of NPK per 100 l of water in combination with superhumisol diluted at 1:10. The method leads to high-quality fruit in cvs Sukholimanski belyi and Cabernet Sauvi-gnon to be made into wine materials of improved quality. Experimental verifica-tion of the method on a number of grape-growing farms confirmed its beneficial effect on yielding capacity in cvs Aligote, Sauvignon vert, Fetiaska belaia, Rhein Riwlsing, Pinot gris and Odesskii chernyi (positive decision concerning patenting the working model was achieved, application u 2005 12123 IPC 7 A 01 G 17/02, A 01 C 17/00 Method for soil dressing for bearing plants of grapevine). Besides, a method for determining root system vigor was developed enabling cultivation costs to be reduced and operation performance to be increased without affecting the status of the plant (positive decision concerning patenting the working model was achieved, application u 2005 10150 IPC 7C 12 G 17/00). Novelty: The beneficial effect and aftereffect of phenyl alanine, mineral fertilizers (nitrogen, phosphorus, potassium) and supehumisol applied as soil dressing in bearing vineyards with low productivity were experimentally proved. The effect and the aftereffect result into higher vigor of grape plants, better leafiness, increased potential fruitfulness and improved fruit quality. Implementation degree: The method developed for soil dressing of low-yielding grape plants while using a hydraulical borer was imple-mented on the farms of the companies "28 Iunia" (Belgorog-Dnestrovsk region) "Shampan' Ukrainy" and "Komsomolets" (Artsiz district of Odessa region) on a total area of 168.5 ha i9n 2003-2005. Effectiveness: Profit of 232.3 thousandhrn was gained. Sphere, branch of use: Viticulture.