Ostroshenko V.YU., Ostroshenko L.YU., Muhin M.D.
Agrohimia 2025; (11): 45-52
The thick-flowered pine (Pinus densiflora Siebold et Zucc.) is a valuable tree species that is used in Primorsky Krai for forest reclamation, improvement of aesthetic and ecological indicators of the urban environment. As a result of the impact of forest fires and deforestation, this tree species is endangered. The ecological and biological value of the thick-flowered pine, along with its limited distribution, necessitates its restoration. One of the possible methods of restoration of this tree species is the use of growth regulators. The prolonged effect of root fertilization of one- and two-year-old pine seedlings with the growth stimulator Zircon in combination with Ferovit and Koren Super preparations on their morphometric parameters at the age of 4 years in the Primorsky Krai was evaluated. The control was seedlings that were not treated with growth stimulants. The main biometric indicators that were studied during the experiment included plant height, height gain, root neck diameter, root length, and dry weight. It was found that the use of root top dressing with growth stimulants Zircon and Koren Super with a concentration of 5 ml of the stimulant/10 liters of water had the greatest positive effect on the growth of seedlings. A significant increase in seedling height (by 23.4%), growth rate (by 23.3%), root neck diameter (by 28.6%), root length (by 13.8%) and total dry weight (by 236%) is shown. The grown seedlings can be used for landscaping the territories of Primorsky Krai.
