Ostroshenko V.YU., Ostroshenko L.YU.
Успехи современного естествознания 2020; (4): 41-47
The effect of root dressing by the stimulants Krezacin, Ribav-Extra, Zircon, Ecopin, Epin-Extra on the growth of biometric indicators of Manchurian fir seedlings (Abies holophylla Maxim.) when growing planting material was studied. The high activity of their increasing (height, the root neck diameter, the root lobe length and biomass) in seedlings fed with growth stimulants Krezacin, Zircon, Ribav-Extra and Ecopin with a concentration of 1ml/10l is observed. So, at a drug concentration of 1ml/10l, in the first year of seedling growth, the excess of the root lobe length, in relation to the control, was 22.1 % when fed with Zircon; Ribav-Extra and Krezatsin, respectively: 16.2 and 19.1 %. At a concentration (1ml/5l), the excess was reduced to 11.8-19.1 %; by the root neck diameter it was 4.5-13.6 %; in height - when feeding with Epin-Extra - by 21.6 %. The growth stimulants Krezacin and Zircon increased the growth index in height - by 33.3-35.3 %, and Ribav-Extra and Ecopin - by 27.5 and 29.4 %. When using the solution concentration 1ml/5l the excess to the control was 15.7-25.5 %. In the second year of seedlings growth, the excess the control in height was 19.4-44.9 %; the root neck diameter - 3.6-28.6 %, along the root lobe length - 1.2-51.6 %. In the third year, seedlings reached standard sizes, and at the end of the vegetation period they significantly exceeded them. All the stimulants had an active influence on the increase in seedlings mass in the dry state. The excess to control was 100.3-179.9 %).
