V. Yu. Ostroshenko1, L. Yu. Ostroshenko2
1 Federal Scientific Center of the East Asia Terrestrial Biodiversity of the Far Eastern Branch of the Russian Academy of Sciences, Vladivostok, Russia
2 Primorsky State Agricultural and Technological University, Ussuriysk, Primorsky Krai, Russia
E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Volume 26 No. 3
Date of paper submission: 04.03.2025, date of review: 15.12.2025, date of acceptance: 20.01.2026.
Published: 03/31/2026
Abstract. The purpose of the research is to investigate the effect of growth stimulants “Krezatsin” and “EpinEkstra” on one-year-old seedlings of ginnala (river maple) to improve its seed germination and morphometric parameters when growing in the conditions of Primorsky Krai. Methods. Field experiments were carried out in the forest nursery of the GTS, a branch of the Federal Scientific Center for Biodiversity of the Far Eastern Branch of the Russian Academy of Sciences, using the generally accepted methodology during 2023–2024. The soil in the area where the studies were conducted is podzolic-brown with a dense clay structure, turning into a meadowbrown podzolic type in the lower part. Results. It has been established, that the growth stimulator “Krezatsin” has the greatest positive effect on seed germination and biometric parameters of maple. “Epin-Ekstra” is less effective. At the same time, the effect of “Krezatsin” in different dosages is ambiguous. Thus, it was found that the stimulant “Krezatsin” had a significant effect on soil germination, exceeding the control indicators by 41.4–70.7 %. The concentration of 3 ml/l has a positive effect on the increase in the average height of seedlings (by 24.2 %). The greatest effect on the length of the root system was also produced by pre-sowing soaking of seeds in a solution of the stimulant “Krezatsin”, the concentration of which was 2 ml/l. Its average value exceeded the control values by 93.1 %. Also, the length of the roots of maple seedlings was significantly affected by the preparations “Epin-Ekstra” at a concentration of 5 ml/l and “Krezatsin” at a concentration of 1 ml/l. The excesses over the control amounted to 44.1 and 62.7 %, respectively. It was revealed, that the treatment of maple seeds with these preparations did not affect the increase in the diameter of the root collar. The greatest effect on the growth of phytomass of annual seedlings of ginnala maple was exerted by the stimulant “Krezatsin” in a concentration of 2 ml/l, exceeding control by 20.1 %. Scientific novelty. For the first time in the conditions of Primorsky Krai, the possibility of using growth stimulants “Krezatsin” and “Epin-Ekstra” on one-year-old seedlings of ginnala maple was studied.
Keywords: forest nursery, growth stimulants, Krezatsin, Epin-Ekstra, ginnala maple, seed germination, morphometric parameters, height, diameter of the root collar, length of roots, phytomass
Acknowledgments. The research was carried out within the state assignment of Ministry of Science and Higher Education of the Russian Federation (theme No. 124012200183-8).
For citation: Ostroshenko V. Yu., Ostroshenko L. Yu. Effect of growth stimulants Krezatsin and Epin-Ekstra on seed germination and the main morphometric parameters of annual seedlings of ginnala (river) maple. Agrarian Bulletin of the Urals. 2026; 26 (03): 417‒428. https://doi.org/10.32417/1997-4868-2026-26-03-417-428 (In Russ.)
Download the full text of the article
