Sharapaniuk O. Productivity of the horizontal-layer mother plantation of apple-tree clonal rootstock depending on the substrate and growth regulator treatment in the Right-Bank forest steppe zone of Ukraine

The object of research is the changes in the phytometric parameters of the plants and the productivity of the rootstock of the clonal rootstocks of the apple depending on the rate of consumption of NAA for processing the base of shoots before the first rolling and the composition of the substrate for the first rolling. The purpose of the research is to increase the productivity of uterine plantings and the quality of the rootstock material of clonal rootstocks of apple trees M.9 T337 and 54-118, depending on the processing of the rootstock shoots growth regulator NAA and the use of substrate of sawdust and expanded polystyrene pellets.Research methods - field, laboratory, laboratory-field, using common methods of obtaining and processing information. Scientific novelty - phytometric indices of plants, root formation and productivity of the clone rootstock of apple trees 54-118 in the mother plantation for the first time are established in the Right-Bank forest steppe, depending on the rate of consumption of the NAA growth regulator, the influence of the rate of consumption of 10% solution of the reducing agent on the parameters of the aboveground part and the root system of sediments is revealed; phytometric parameters of plants and productivity of uterine plantings of clonal rootstocks of apple trees M.9 T337 and 54-118 were determined depending on the composition of the substrate for rolling; peculiarities of growth, rooting and yield of sediments depending on the content of expanded polystyrene pellets in sawdust for the first growth of mother plants were revealed.