Features of Yield and Commodity Composition of Pine and Spruce Modal Coniferous Stands for the Age of Mature Stands

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DOI:

10.17238/issn0536-1036.2018.2.40

Abstract

The paper presents the research results of commodity composition and yield of stands in different forest conditions stationary objects of Various variants of experiments with an observation period of 50‒85 years are used. The scientists of the Leningrad Forestry Research Institute and the Forestry Department of the Saint Petersburg State Forest Technical University established them in different years. Temporary sample plots and production facilities in the Gatchina Forestry of the Leningrad Region were also studied. The authors followed standard concepts, current normative reference materials and regulatory requirements when establishing and estimating by circular sample plots and calculating the survivor growth of forest stands. In determining the forest types, a forest typological scheme applied in forest management and based on the edapho-phytocoenotic classification of V.N. Sukachev was used. The analysis of variance showed that the influence of the composition of mixed stands on the yield in the long moss myrtillus and green moss myrtillus forest types was more than half of the total sum of all factors (η = 54 %). In the green moss group of forest types this factor accounted for 40 % of the total of all impacts. In drained forest types, the influence of the stand composition on the yield was minimal, since the changed soil and hydrological regime was more effective. Data on the commodity composition and yield of pine and spruce mixed stands in the long moss and sphagnous series of forest types demonstrated the yield increase by the age of mature stand due to the improvement of forest growing conditions. In the sphagnum drained pine forest, the yield of large and medium-sized timber was the same with a different share of pine and spruce. This indicator was higher in a long moss drained pine forest; the yield was larger. In the process of formation of mixed spruce and pine plantations, we should increase the share of pine in the earlier stages of stand development. In this case, a larger wood volume with larger trunks can be produced from a unit of area by the age of the main felling. The yield of large and medium wood is higher in the myrtillus drained forest type with a significant share of pine, in comparison with spruce predominance. Pine under the improvement of conditions reacts more actively to draining by its growth than larger trees of spruce.

Authors

D.A. Danilov, Candidate of Agricultural Sciences, Associate Professor
N.V. Belyaeva, Doctor of Agricultural Sciences, Professor
A.V. Gryaz'kin, Doctor of Biological Sciences, Professor

Affiliation

Saint Petersburg State Forest Technical University under name of S.M. Kirov, Institutskiy per., 5, Saint Petersburg, 194021, Russian Federation; e-mail: stown200@mail.ru, galbel06@mail.ru, lesovod@bk.ru

Keywords

mixed stand of pine and spruce, stand composition, forest type, commodity composition

For citation

Danilov D.A., Belyaeva N.V., Gryaz'kin A.V. Features of Yield and Com-modity Composition of Pine and Spruce Modal Coniferous Stands for the Age of Mature Stands. Lesnoy zhurnal [Forestry journal], 2018, no. 2, pp. 40–48. DOI: 10.17238/issn0536-1036.2018.2.40

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Received on September 27, 2017