Fruit growing
and viticulture of South Russia

Annotation

In the scientific institutions of different countries, purposeful selection work is carried out to improve the assortment of rootstocks, to study their adaptive capabilities, and to identify donors and origins of selection-significant features. According to the Agreement for creative cooperation, in RUE �Institute for Fruit Growing� (Belarus) the apple rootstocks of the St serie of the North Caucasian Federal Scientific Center of Horticulture, Viticulture, Wine-making and the Stavropol Experimental Station on Horticulture, a branch of the North Caucasus Federal Research Center breeding are testing. The article presents the results of the assessment of economic and biological peculiarity of 4 forms of St serie Apple rootstocks in the rootstocks uterine plantings in 2016-2018. Planting scheme is 1.4 x 0.3 m., the plot is not irrigated. The analysis of the main meteorological indicators � the temperature regime during the growing season, the amount of precipitation � indicates of their contrasting nature in the years of research. It allowed us to objectively carry out the comparative assessment of plant studied development. According to the results of the assessment of winter hardiness in the field, the absence of significant damage to plants was noted. Preliminary results on the data of the beginning and ending of plants vegetation, the assessment of thermal territory resources over the years of research show that the heat supply and duration of periods with an average daily air temperature above 5, 10 ºC correspond to the biological needs of the studied clonal rootstocks of the St serie. Based on the results of assessment of biometric indicators (shoot-forming ability, plant height, degree of branching, aging, rooting), the rootstock of St 19-5 was selected, which is characterized by the best indicators in the Belarus. According to the results of studies carried out in the Krasnodar at high temperatures against the background of drought in the summer growing season, St 18-3 rootstocks in 2015 and St 19-5 in 2017 were identified as origin of productivity and layers standard in the maternal rootstocks plantings.