Growth Stimulators for Container Seedlings of Pinus sylvestris L. in the Second Rotation. P. 88-100

Complete text of the article:

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UDС

582.475+581.143

DOI:

10.37482/0536-1036-2026-2-88-100

Abstract

The technology for the production of planting stock with a closed root system of the main forest-forming species using a multi-cropping growing regime is being improved. The introduction of such a regime in the forest nurseries of the subzone of the middle taiga forests of Russia with a short growing season is difficult due to the risk of unpreparedness of the second rotation seedlings for transplanting them to a forested area and them low stress resistance. Growth stimulants that have a positive effect on seedlings of forest species, improving their morphometric parameters and increasing their adaptive responses are proposed to be used in growing coniferous seedlings in forest nurseries as agrotechnical techniques. This article shows the effect of foliar treatment with growth stimulants – Ecorost, Zircon and Epin-extra in various concentrations on morphometric parameters, frost resistance, survival rate and growth when planting in a model plot, container seedlings of Scots pine (Pinus sylvestris L.) of the second rotation grown in high-latitude conditions. The damage index of pine needle cell membranes exposed to low temperatures (from –50 to –320 °C) in the spring during the transition of plants from dormancy to vegetation was studied. Studies have shown that Ecorost and Epin-extra increased the frost resistance of seedlings at –15 °C. The tested growth stimulators had a positive effect on the height of seedlings – up to 23 % compared with the control. They increased the mass of seedlings (up to 68 %), especially roots (up to 97 %), which indicates the potential for their use to improve key indicators of seedling quality – survival and growth in a forest cultivation area. The tested growth stimulators increased the height gain of seedlings when growing in a model plot, which is important for their further development when creating forest crops. The preparations are of practical importance for improving agricultural practices in the cultivation of coniferous planting material during double-cropping cultivation at high latitudes.

Authors

Elena A. Koposova, Intern-researcher; ResearcherID: ODM-1685-2025,
ORCID: https://orcid.org/0009-0005-1804-9042
Nadezhda P. Chernobrovkina*, Doctor of Biology, Assoc. Prof.; ResearcherID: K-6120-2018,
ORCID: https://orcid.org/0000-0002-9716-003X
Karina G. Nelaeva, Postgraduate Student; ResearcherID: GYJ-7223-2022,
ORCID: https://orcid.org/0000-0002-3283-4451
Elena V. Robonen, Research Scientist; ResearcherID: AAD-1958-2019,
ORCID: https://orcid.org/0000-0001-7926-8672
Anastasiya V. Egorova, Candidate of Agriculture, Junior Researcher Scientist;
ResearcherID: K-6095-2018, ORCID: https://orcid.org/0000-0002-1691-1269

Affiliation

Forest Research Institute of the Karelian Research Centre of the Russian Academy of Sciences, ul. Pushkinskaya, 11, Petrozavodsk, Russian Federation, 185910; elena-kpv@yandex.ru, chernobrovkina50@bk.ru*, nelaevakg@krc.karelia.ru, er51@bk.ru, egorova.anast@mail.ru

Keywords

Pinus sylvestris, container seedlings, double-cropping cultivation, growth stimulants, morphometry, frost resistance, high latitudes

For citation

Koposova E.A., Chernobrovkina N.P., Nelaeva K.G., Robonen E.V., Egorova A.V. Growth Stimulators for Container Seedlings of Pinus sylvestris L. in the Second Rotation. Lesnoy Zhurnal = Russian Forestry Journal, 2026, no. 2, pp. 88–100. (In Russ.). https://doi.org/10.37482/0536-1036-2026-2-88-100

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