Estimation of pulpwood balance yield under accelerated growth of pine and spruce wood in the Leningrad Region

The study of qualitative characteristics of pine and spruce wood grown under intensive technology in plantation crops in the Leningrad region has been carried out. Quantitative and qualitative characteristics of pine and spruce wood volumes under short-rotation intensive forest growing allow obtaining raw materials for pulp and paper production. Experimental pulping has shown the principal possibility of using this wood for pulp production suitable for cardboard and technical paper production. On the basis of the analysis of calculations of the balance productivity of pine and spruce plantations grown under the short-rotation scheme, it is possible to determine the optimal growing regime for these plantations from the point of view of obtaining the maximum volume of marketable unbleached pulp. When growing pine plantations for balance wood for pulp and paper industry, the optimum density and stock is the variant with the density of 1200 trees by the cutting age of 40 years. For spruce plantations the optimums in terms of non-white pulp yield were plantations with stock and density in the range of 1100–1600 trees per hectare. At intensive forest growing these regimes of density control for pine and spruce plantations are optimal for obtaining the maximum amount of raw material for pulp production.

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