EFFECTS OF STIMULANTS ON BIOMETRIC INDICATORS OF GROWTH OF KHINGAN FIR SEEDLINGS (ABIES NEPHROLEPIS (TRAUTV.) MAXIM.) IN THE CONDITIONS OF PRIMORSKY KRAI

The effects of root-feeding stimulators Crezacin, Ribav-Extra, Zircon and Epin-Extra on the growth of seedlings of Khingan fir (Abies nephrolepis (Trautv.) Maxim.) as growing planting materials are studied. There was a higher growth activity in seedlings fed with Ribav-Extra growth stimulant at solution concentrations of 1ml/5l and I ml/10l and Zircon at a concentration of 1ml/10l. Root feeding of seedlings with these stimulants activates their growth in height and biomass, the development of side shoots and the formation of the crown of plants. Three-year-old seedlings can be used for transplanting into the school nursery department, for further cultivation of seedlings and their use in landscape construction. Four-year-old seedlings grown with root-feeding with these stimulants in terms of growth meet the requirements of the current OST 56-98-93 and exceed it in height by 12.3-40.4%, in diameter of the root neck by 6.7-43.3 %. (C) 2019 INT TRANS J ENG MANAG SCI TECH.