METHOD FOR CONTROLLING FORMATION OF QUALITY OF GRAPE WINE

FIELD: viniculture, in particular, methods for predicting and evaluating of wine quality. ^ SUBSTANCE: method involves determining structural features of crude material such as sugar content, titratable acidity, yield, selection of processing trend, degustation evaluation; measuring under different ecological cultivation conditions values of outside limiting factors at ontogeny phases of grape sort; designing, on the basis of data received, multiple regression models of association among structural features with outside limiting factors; selecting by parameters of model optimal harvesting time, cultivation zone, ecological conditions of which zone maximally correspond to genetic requirements of sort; building multiple regression models of association of degustation evaluation of grape wine with its structural features and, on the basis of data received, building nomograph; on the basis of said nomograph, judging kind and quality of wine by forming four quadrants defined by horizontal and vertical boundaries, first of which extends along line according to which wine has constant degustation evaluation regardless of level of titratable acidity and constant sugar content value, and second of which extends through point of intersection of all the lines on nomograph, with sugar content-acidity interval values lying on lines in left-hand and right-hand upper quadrants corresponding to higher-quality dry and special wines, correspondingly, and left-hand and right-hand lower quadrants corresponding to lower-quality special and dry wines. ^ EFFECT: provision for selecting grape sort or cultivation zone corresponding to genetic requirements of sort with predetermined quality and productivity factors, and defining optimal harvesting time owing to consideration of effect thereon of outside limiting environmental factors by ontogenesis phases to enable formation of quality and kind of wine. ^ 1 dwg, 1 ex