Regularities of Commodity Structure Forming in Shrinking Spruce Forests

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Abstract

Mass drying of uneven-age spruce forests in the Northern taiga, has been observed since the late 19th century. New occurrences of mass dying of spruce forests have been marked since the beginning of this century in the forests of the area between the Northern Dvina and Pinega rivers in the Arkhangelsk region. Currently in this area are drying affected about 2.5 million hectares of spruce forests.  Depending on the degree of age groups representation in spruce forests, types of forest conditions, shrinkage size is greatly varies.The stands drying itself and marketability of drying spruce stands is a multifactorial phenomenon. The remaining part of the stands, presented by the young generations, has a reduced commodity structure, in comparison with the similar age generations in untouched forest stands by the drying. The shrinking and the subsequent collapse of the stand reminds uncontrolled selective felling of medium to high intensity, in which the selection is subject to just the generation that risks entering into the category of dried trees under the influence of a complex of factors. On the basis of a trees distribution series, models of selective cutting parameters calculation in spruce forests with various growth conditions and regional assortment tables for the Northern taiga spruce forests, developed by the author, are obtained forecast tables of merchantability shrunken, and the remaining (unaffected by the shrinkage) stands. Due to the drying part of the stand will disturb the natural distribution of the amount of trees in thickness. Therefore, the application of customary forest valuation norms, developed for stands with no signs of mass drying, in most cases, causes errors.

Authors

S.V. Koptev, Candidate of Agriculture, Associate Professor Northern (Arctic) Federal University named after M.V. Lomonosov Naberezhnaya Severnoy Dviny, 17, Arkhangelsk, 163002, Russia; е-mail: s.koptev@narfu.ru

Affiliation

Northern (Arctic) Federal University named after M.V. Lomonosov

Keywords

regularities of stand, overmature generations, selective cuttings, shrinked trees, probable tree fall-off, merchantable structure forecast.

References

1.GOST 9463-88. Lesomaterialy kruglye khvoynykh porod [State Standart 9463-88. Round Timber of Coniferous Species]. Moscow, 1988. 13 p. 2. Gusev I.I. Vliyanie vozrastnoy struktury na sootnoshenie diametrov i vysot v taezhnykh el'nikakh [The Influence of Age-Dependent Structure on the Ratio of Diameters and Heights in the Taiga Spruce Forests]. Lesnaya taksatsiya i lesoustroystvo, Mezhvuz. sb. nauch. tr. [Forest Valuation and Forest Management: Interuniversity Collected Papers]. Krasnoyarsk, 1982, pp. 110–114. 3. Gusev I.I. Zakonomernosti stroeniya elovykh drevostoev Evropeyskogo Severa [Regularities of Spruce Forests Structure of the European North]. 1977. 40 p. 4. Gusev I.I. Produktivnost' el'nikov Severa [Productivity of Spruce Forests in the North]. Leningrad, 1978. 232 p. 5. Gusev I.I., Koptev S.V. Sortimentnaya struktura severotaezhnykh el'nikov [Assortment structure of the North-taiga spruce forests]. Lesnoy zhurnal, 1991, no. 4, pp. 3-11. 6. Gusev I.I., Koptev S.V. Tovarnost' severotaezhnykh el'nikov. Povyshenie produktivnosti lesov Evropeyskogo Severa [Marketability of the Northern Taiga Spruce Forests. Increase of Forest Productivity of the European North]. Arkhangelsk, 1992, pp. 56–66. 7. Gusev I.I., Koptev S.V., Tret'yakov S.V. Matematicheskoe modelirovanie intensivnosti rubki v el'nikakh vyborochnogo khozyaystva [Mathematical Modeling of Heaviness of Felling in Spruce Forests of the Selective Cutting Management]. Sb. nauch. tr. Problemy lesovosstanovleniya na Evropeyskom Severe [Collected Papers: Problems of Forest Regeneration in the European North]. Arkhangelsk, 1999, pp. 25–35. 8. Koptev S.V., Tret'yakov S.V., Yaroslavtsev S.V. Zakonomernosti formirovaniya el'nikov vyborochnogo khozyaystva i ikh tovarnoy struktury [Regularities of Spruce Forests Formation of the Selective Cutting Management and Their Commodity Pattern]. Sovremennaya nauka i obrazovanie v reshenii problem ekonomiki Evropeyskogo severa. Mater. Mezhdunar. nauch. tekhn. konf. [Modern Science and Education in Solving the Economic Problems of the European North. Proc. Int. Sci.-Tech. Conf.]. Arkhangelsk, 2009, pp. 34–36. 9. Kuznetsov N.A. Zadvinskie el'niki. K voprosu o massovom podsykhanii eli i v svyazi s nim o nekotorykh izmeneniyakh v khozyaystvakh pilovochnykh dach. [Spruce Forests Situated on the Right Bank of Dvina-River. To the Question of Mass Drying of Spruce and Some Changes in the Sawn Goods Resources]. Vvodnyy doklad XII Vserossiyskomu S"ezdu lesovladel'tsev i lesokhozyaev v gor. Arkhangel'ske v 1912 g. [Inducement Report of the XII all-Russian Congress of Forest Owners in Arkhangelsk in 1912]. St. Petersburg, 1912. 40 p. 10. Surina E.A., Sen'kov S.A. Sostoyanie el'nikov v mezhdurech'e Severnoy Dviny i Pinegi [State of Spruce Forests in the Area Between the Northern Dvina and Pinega rivers]. Problemy taezhnogo lesovodstva. Sbornik nauchnykh trudov [Problems of Taiga Forestry. Collected Papers]. Arkhangelsk, 2010, pp. 84–94. 11. Chibisov G.A., Vyalykh N.I. Vyborochnye rubki v severotaezhnykh el'nikakh [Selective Cutting in the Northern Taiga Spruce Forests]. Problemy taezhnogo lesovodstva. Sbornik nauchnykh trudov [Problems of Taiga Forestry. Collected Papers]. Arkhangelsk, 2010, pp. 53–67.