RUSSIAN JOURNAL OF FOREST SCIENCE, 2020, No. 2, 162–174


СONIFEROUS SPECIES BIOELECTRIC AND TEMPERATURE DIAGNOSTICS
V. N. Karasyov, M. A. Karasyova, D. I. Mukhortov
Volga State University of Technology,
Lenin Sq., b. 3, Yoshkar-Ola 424000, the Republic of Mari El, Russia
E–mail: MuhortovDI@volgatech.net


Received: 24 January 2018
Bioelectric potentials (BEP), impedance of alburnum and temperature features of tree trunks were used for a diagnostics of coniferous trees physiological state in natural conditions. As a result it was determined that while thriving trees have BEP in a range of 180-210 mV, the weakened ones have BEP of 60-70 mV. The impedance of alburnum in healthy trees is about 20-30 kO, while in weakened ones it becomes 2-3 times bigger. A correlation was found between the vital state of a tree and its trunk temperature (r = –0.9). An estimation method for the amount of water consumption by a tree was developed based on a linear speed and volume of water flowing through a single unit of water conductive xylem. A correlation was found between a trunk temperature, water consumption and tree’s vital state. For healthy trees trunk temperature on 1,3 m height was found to be close to the temperature of soil’s rooting zone, while the weakened trees have slightly higher temperature. Finally, some examples are given that prove the expedience of employing the bioelectric features when selecting resistant and productive biotypes and seed trees, as well as when assessing the vital state of trees in recreational zones. Thus, the express-method is recommended to use for the diagnostics of tree’s physiological state based on its bioelectric and temperature features.
Keywords: Scotch pine, Norway spruce, Siberian larch, Siberian pine, diagnostics, vital state, thermoexpress-method, bioelectric potential, impedancemetry.
Acknowledgement: This study was held in a framework of the state assignment to the Volga State University of Technology, 2017.
DOI: 10.31857/S0024114820010088


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