Influence of substrate composition on survival rate and root formation of adaptable ex vitro plants of north American varieties of half-highbush blueberry

The article presents the results of studies of the influence of substrate composition on the survival rate and root formation at the stage of adaptation of North American varieties (Northblue and Northcountry) of half-highbush blueberry plants to the ex vitro conditions. The half-highbush blueberry is a hybrid of Vaccinium corymbosum × V. angustifolium Ait species. This species is frost-resistant, high-yielding, and resistant to various diseases and pests. Blueberry fruits contain a rich composition of biologically active substances, provitamin A, vitamins B1, B2, C, PP, phosphorus, calcium and iron in an easily digestible form. Studies on the adaptation of blueberry plants of the half-highbush varieties Northblue and Northcountry on three types of soil substrate: peat+soil 1:1, peat+sand 3:1, transitional peat type. An optimal soil substrate is selected for plant adaptation in vitro to ex vitro non-sterile conditions. The highest percentage of blueberry plant survival is on the substrate peat of the transitional type...