Authors:
V. A. USOLTSEV, doctor of agricultural sciences, professor,
V. P. CHASOVSKIKH, doctor of technical sciences, professor,
M. V. AZARENOK, candidate of agricultural sciences, associate professor, E. V. KOKH, candidate of agricultural sciences, associate professor,
Ural State Forest Engineering University (37 Sibirskiy tract Str., 620100, Ekaterinburg)
Abstract.For the first time in Russian literature the problem of harmonizing allometric models of pine tree biomass components (stem, branches, foliage, roots) by means of ensuring the principle of their additivity has been solved. It is implying that the sum of biomass values obtained by component equations should be equal to the value of total biomass received with the general equation. For this purpose the unique tree biomass database in a number of 2080 two-needled pine trees (subgenus Pinus L.) of natural and artificial origins growing on the territory of Eurasia is compiled. Additive systems of biomass component relations, as two transcontinental three-step models of proportional weighting are designed. On their basis the corresponding taxation tables of the biomass component composition involving two inputs - the stem diameter at breast height and the tree height – are suggested for natural pine forests and plantations separately. The proposed models and corresponding tables for estimating tree biomass make their possible to calculate two-needled pine biomass per ha (t/ha) on Eurasian forests as the first approximation when using measuring taxation. Because such transcontinental models and tables may have biases in local conditions for their application, in the next stage of this research more detailed, regional tree biomass models and tables through disaggregating proposed here common models for regional ones using dummy variables will be developed.
Keywords: subgenus Pinus L., natural forests, plantations, biosphere role of forests, biomass of trees, allometric models, equations additivity, transcontinental table of tree biomass.
