The duration of vegetation period of several wine-grape varieties in the conditions of apsheron

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During the vegetation period there come out the vital functions of grape plant (growth, development, fruiting, etc.). The vegetation of vine plant begins with sap flow, swelling and budding in spring on reaching the mean temperature of 10 °С. This temperature is accepted as “biological zero” vore vine plant. Vegetation period ends in autumn when the weather gets cooler and mean temperature decreases to +10°C and below. Number of days of vegetation period differ from variety to variety. By this feature all grape varieties are divided into groups according their ripening period. Duration of vegetable period depends of the variety, weather conditions of the year, as well as the soil and climatic conditions of the area. In Azerbaijan, one of zones possessing very favorable conditions for development of viticulture, is Apsheron peninsula. Historically table viticulture was widely spread at this territory, the population enreached the gene pool of the country by table grape varieties of very high quality. Our researches were aimed at studying of Apsheron conditions as for its suitability for growing of wine grape varieties for use as raw material in high profitable sphere as wine-making. In the article are presented the results of study of the terms of vegetation process of wine grape varieties and hybrid forms for obtaining of high quality wines in conditions of Apsheron peninsula.