ВЛИЯНИЕ СРОКОВ ЗАГОТОВКИ ЧЕРЕНКОВ ИНТРОДУЦЕНТА CHAMAECYPARIS PISIFERA НА ИХ ПРИЖИВАЕМОСТЬ В УСЛОВИЯХ ОРЛОВСКОЙ ОБЛАСТИ

Abstract

The aim of the research is to study the method of vegetative propagation by cuttings to obtain a viable planting material of sawara cypress with a closed root system in the conditions of the Orel region. The study was carried out in 2019 at the private farm by Bykov L.S., Trosnyansky district, Orel region, in a cold closed ground, represented by gray forest medium loamy soils. Reproduction of the introduced species was carried out by rooting lignified cuttings in a nutrient substrate, which was prepared on the basis of neutralized peat with an acidity of 5.0 to 6.0 pH with the addition of perlite in a ratio of 4 to 1. Cuttings for the first group were cut on April 15 (before the beginning of the growing season), and for the second – on 16 May 2019 (after the beginning of the growing season) early in the morning from one mother plant, when the shoots are maximally saturated with moisture. Then the cuttings were planted in cassettes of 160 cells with an area of 0.24 m2 /piece to a depth of 2-3 cm and placed in an unheated protected ground with periodic watering. The best result for cuttings in the control group, harvested in mid-April (before the beginning of the growing season) – 96%, and for cuttings cut in mid-May (after the beginning of the growing season) – 60%. The mass of roots in established spring cuttings does not depend on the timing of reproduction, both variants showed an average weight of one root – 1.1 g. The profitability of the production of sawara cypress seedlings in the control group (when harvesting cuttings before vegetation) is 75%, which is 20% more than in seedlings grown from cuttings harvested after the beginning of the growing season.