Influence of growth stimulants on the biometric indicators of four-year-old Khingam fir (white-bark) (<i>Abies nephrolepis</i> (Trautv.) Maxim.) seedlings

Abstract

Relevance. One of the main methods of reforestation is the use of growth stimulants, which are widely used in agriculture in Russia and abroad. In forestry, their use is carried out on an experimental basis. The increase in the sowing qualities of seeds, in the biometric indicators of seedlings is observed, their safety is activated. In this regard, the use of such growth stimulants as Zircon, HB-101, Root Super and Ferovit is relevant.Methods. The effect of root feeding with stimulants Zircon, HB-101, Root Super and Ferovit on the biometric parameters of four-year-old seedlings of Khingam fir (Abies nephrolepis (Trautv.) Maxim.) was studied. The experiments were carried out in the nursery of GTS — the branch of Federal Scientific Center of the East Asia Terrestrial Biodiversity FEB RAS. The growth of seedlings was studied in terms of stem height, height gain and root collar diameter.Results. It has been established that root fertilization with the stimulants Zircon and HB-101 has the greatest effect on the growth of fir seedlings. The increase in the height of seedlings is by 3.9–60.7%, in height gain — by 11.4–137.1%, as well as in the diameter of root collar — by 16.7-66.7% was noted. It was revealed that the use of the stimulator HB-101 in the solution concentration of 0,5 ml / 10 l has a more positive effect compared with the concentration of the drug solution of 0.5 ml / 5 l of water.