Written Paper

Growth of forest stands as analogue of production process in economic systems: E2E-Model  [2015]

Sukhovolskij, V.G., Russian Academy of Sciences. Siberian Branch, Krasnoyarsk (Russian Federation). The V.N. Sukachiev Inst. of Forest Science Ivanova, Yu.D.

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Economic-ecological model (E2E-model) is proposed to describe plants' growth. Growth process of forest stand phytomass is considered within E2E model as production process analogue in economics. As capital in E2E models non-photosynthetic phytomass components are considered – stem, roots and branches. Labor role satisfies leaves (or needles), in which photosynthesis process occurs. Produced by photosynthesis process, energy is partially consumed for current plants "consumption" and partly "invested" and is transformed into new phytomass, which is distributed between non-photosynthetic trees' components and their photosynthetic apparatus. Trees death in stand during growth in E2E model is considered as capital depreciation (aging equipment, etc.) analogue in production process. For complete process description of energy production and phytomass during photosynthesis equations are introduced describing phytomass synthesis, distribution principles obtaining resources to meet current energy plants' needs and for investments in new phytomass are described, investment allocation principles to reproduction "capital" – trunks roots and branches phytomass, and "labor" reproduction – trees' leaves or needles are determined. The proposed approach to the description of the growth in forest stand as an analogue of production may be regarded as competitive in relation to the autocatalytic growth models – different clones of the Verhulst equation. In comparison with the
autocatalytic growth models, E2E-growth models allow describing a number of phenomena observed in the forest (such as the death of trees and forest crops) and not explained in terms of autocatalytic models. Calculation of phytomass of dead wood in the plantation opens the possibility of using the E2E model to describe the process of transformation of dead wood with decomposers (fungi, bacteria, insects), as well as to determine the amount of forest fuel and the risk of forest fires.

From the journal

Siberian Journal of Forest Science

ISSN : 2311-1410