Seasonal Resin Productivity Dynamics of Drained Pine Stands

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630*284.2:630*385.1

DOI:

DOI: 10.17238/issn0536-1036.2017.1.21

Abstract

On the research results of 2009–2013 we conducted the closed experimental tapping in the pine forests in the forest hydromelioration stations of the Sokol district, Vologda region. The experimental pine forests were presented by the stands transformed after drainage and the pine stands after drainage and partial cutting (thinning); peat accumulation was present-ed by the transitional water-logging process; the pine forests belonged to the sedge-sphagnum group. Pine was dominant in a tree layer. The share of birch and spruce was less than 10 % before cutting. Our research was mainly dedicated to the approbation of the prox-imate method of micro wounding, used for closed rapid tapping. We offered the formula for the obtained results recalculation according to the Russian method of the resin productivity evaluation. The following research objectives were considered: to develop and adjust the proximate method of micro wounding for the resin productivity evaluation of pine stands; to define the stable and significant summer growth period of time for drained pine stands when the resin productivity is maximum; to identify the differences in pine resin exudation in different categories of objects (canalside and interchannel drained wood lines; drainage and drainage with thinning); to set the minimum research time period of the resin productiv-ity to get the reliable results. The research results demonstrate that the proximate method of micro wounding for the shortest period of time allows us to get reliable data on the resin productivity of drained pine forests, which can serve as a general indicator of the living condition of pine trees. The 5-year observation period for drainable pine forests led to the following conclusions: the resin productivity in June is by 21 % higher than in average for the whole summer period; in the canalside drained area the turpentine yield is by 10 % more intense, than in the interchannel one; thinning affects positively as the resin productivity increases by 42 % comparing to the pine stand that was only drained. 3-year monitoring of drainable pine stands can give the most reliable results when establishing their resin productivity.

Authors

А.S. Novoselov1, Сandidate of Agricultural Sciences, Associate Professor N.A. Druzhinin2, Doctor of Agricultural Sciences, Professor

Affiliation

1Vologda State Technical University, ul. Lenina, 15, Vologda, 160000, Russian Federation; e-mail: tolyannow@mail.ru
2Vologda State Dairy Farming Academy by N.V. Vereshchagin, ul. Pankratova, 9a, bl. 7, Molochnoe, Vologda, 160555, Russian Federation; e-mail: drujinin@mail.ru

Keywords

tapping of pine, pine resin (turpentine), forest hydromelioration, partial cutting, resin productivity, pine forest stand

For citation

Novoselov А.S., Druzhinin N.A. Seasonal Resin Productivity Dynamics of Drained Pine Stands. Lesnoy zhurnal [Forestry journal], 2017, no. 1, pp. 21–29. DOI: 10.17238/issn0536-1036.2017.1.21

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Received on September 30, 2015