Calorific Value of Pine Wood in Crops of the Northern Taiga Forest Area

Calorific value of plants is an important characteristic for evaluation material cycles and energy conversion in forest ecosystems, as well a qualitative plant raw materials fuel. Wood biofuel increasingly used the production thermal energy, this regard, it to study calorific wood, conditions growing high-quality materials. The research purpose identify dependence pine wood crops on its macroscopic structure, assimilation apparatus characteristics, density height stand. Small, medium, large not damaged model trees without pathologies were selected temporary sample plots. Cores from which taken with increment borer at 1.3 m measure radial growth semi-automatic complex Lintab-6 accuracy ±0.01 mm. was determined absolutely dry state using automated bomb calorimeter ABK-1V. To influence assimilating value, needles all ages middle branch tree crown. Cross sections prepared part needle sledge microtome MS-2. Histological elements measured by Axio Scope.A1 microscope IMAGE-PRO INSIGHT 8.0 software. average heat capacity heath-lichen forests (20 731±133) J/g; cowberry – 618±141) bilberry 513±104) J/g stand 1160 3806 pcs/ha. highest found 5021 increased high due reduction number (r = –0.75) increase diameter resin channels 0.88). annual layer structure found.