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Kirienko M. A., Goncharova I. A. The Prolonged Influence of Growth Stimulants on Morphometric Indicators of Three-Year Seedlings of Main Forest Forming Species of Central Siberia

Keywords:
growth stimulants, seedlings, morphometric indicators, coniferous

Abstract

How to cite: Kirienko M. A., Goncharova I. A. The prolonged influence of growth stimulants on morphometric indicators of three-year seedlings of main forest forming species of Central Siberia // Sibirskij Lesnoj Zurnal (Sib. J. For. Sci.). 2018. N. 1: … (in Russian with English abstract).

DOI: 10.15372/SJFS20180107

© Kirienko M. A., Goncharova I. A., 2018

The prolonged effects of growth stimulants with differences in active substance on morphometric parameters of three-year old seedlings of Scotch pine Pinus silvestris L., Siberian spruce Picea obovata Ledeb., Siberian larch Larix sibirica Ledeb., whose seeds had been treated with growth substances were studied. Analyzing a set of indicators: seed germination, seedling safety, height and diameter of trunks at root collar of 3-year-old seedlings in the forest-steppe zone of the Krasnoyarsk territory the reaction specificity of coniferous seedlings to seeds pre-plant processing are stated. It was found that height, height increment and stem diameter of Scots pine seedlings whose seeds were treated with stimulants Obereg', Zircon, Epin-extra, Ecogel were significantly higher than seedlings under control. Seedling height and height increment of Siberian spruce seeds, which were processed by the stimulant Epin-extra were significantly more than the same under control. In addition to Epin-extra, Zircon and Heteroauxin stimulants had a positive effect on Siberian spruce seedling stem diameter. Siberian larch seeds treatment by all stimulants except Immunotsitofit, had a positive impact on the height and diameter of stem 3-year-old seedlings. The highest stem diameter was observed in seedlings whose seeds were treated with Ecogel and Heteroauxin stimulants. All stimulants had a significant positive effect (1.5–2 times higher compared to control) on the current linear increments.


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