Open AccessThermodynamic approach to assessing the productivity of phytocenoses - a way to predict their protection in a changing climate
Author(s) -
E. P. Kvachantiradze
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/539/1/012039
Subject(s) - productivity , environmental science , measure (data warehouse) , water content , mathematics , computer science , geology , geotechnical engineering , database , economics , macroeconomics
In the scientific literature, the prognostic equations of the productivity of phytocenoses have a local nature – this fact can be explained by the absence of a single unit of measure for all variables composing the equation. The result of this approach is the refusal to find one model that describes the general regularity of changes in the physiological processes of plants due to climatic changes. The productivity of phytocenoses is the result of the “soil-plant-climate” relationship. In the previous studies, the author presented a thermodynamic approach to climate analysis; a methodology has been developed for determining the volumetric heat content of soils, and the thermodynamic approach to assessing plant productivity is proved in the current study. For this purpose, the concepts of the heat content of phytomass and the heat content of the aerotope (unit of measure - kJ / kg of dry air) were introduced, and from this point of view the dependence of physiological parameters is based not on various combinations of external meteorological parameters, but on the corresponding integral indicators of the heat content of the leaf and aerotope for conditions of different density and plant height. The heat content of the phytomass was taken as the heat content of the air space bordering the lamina. Introduction of these concepts simplified the analysis of the multifactorial effect of meteorological elements on plant productivity. The capability of a thermodynamic approach to assess the productivity of phytocenoses as a result of the relationship of plants with the environment is demonstrated, as evidenced by the high degree of correlation dependence of the studied parameters. The possibility for describing the “soil-plant-climate” system in a single energy system is substantiated, provided that an assessment of the productivity of phytocenoses is introduced from the point of view of net primary productivity, measured in energy units (Joule).