Peculiarities of water regime and potential drought ability of apricot cultivars under the conditions of summer moisture deficiency on the Southern coast of Crimea

Abstract

The paper presents researches on biochemical assessment of grape cultivars of various origin. Grape cultivars, grown in the forest-steppe of Altai region, are characterized by the following biochemical composition of berries: sugars -10.7-17.8 %, acids -0.6-1.9 %, SAI -7.9-23.9. The cultivars and selected forms of Amur group exceeded the American one in their sugar content by 1.8 %, in acids -by 0.1 %. In Vitis amurensis Rupr. Group, a high sugar content was observed in the selective form 39 (15.1 %), in the group Vitis labrusca L. -cultivar 'Latviisky rozovy' (12.7 %). very early ripening cultivars 'Russky ranny' and 'Zhemchug bely' depended on weather conditions less than other cultivars since their variability in all indicators was insignificant or average. There was selected a cultivar 'Russky ranny' with consistently high sugar (16.1 %) content and low acid content (0.7 %).