Features of Water Exchange of Pinus nigra subsp. pallasiana in Conditions of Southern Coast of Crimea

DOI

10.2991/assehr.k.200113.145How to use a DOI?

Keywords

Pinus nigra subsp. pallasiana, water regime, ecological and physiological characteristics, environmental factors

Abstract

The eco-physiological reaction of Pinus nigra subsp. pallasiana on the impact of extreme environmental factors was studied; optimum zones and threshold values of soil moisture, temperature and illumination that limits photosynthesis and transpiration of this species in the conditions of the southern coast of Crimea were determined. The optimums of the studied parameters were found: En on the impact of extreme environmental factors was studied; optimum zones and threshold values of soil moisture, temperature and illumination that limits photosynthesis and transpiration of this species in the conditions of the southern coast of Crimea were determined. The optimums of the studied parameters were found: En = 25-50 mg / (m2s), I s), I = 450-1000 µmol/(m2s), Pn s), Pn = 8,5-10 µmol/(m2s), Ws s), Ws = 55-70s), Ws = 55-70% FC. As an indicator of the response (reaction) of species to irrigation, we used the relative water flow rate in the plant shoot and changes in shoot diameter, as well as apical growth of the plant. Analyzing research results allowed us to study the features of water regime of the studied species and reaction to extreme environmental factors. After a severe drought and two irrigations, it took about two days to restore the studied parameters to the initial values. Using the nonlinear regression equations, the dependencies are determined: Pn s), Ws = 55-70% FC. As an indicator of the response (reaction) of species to irrigation, we used the relative water flow rate in the plant shoot and changes in shoot diameter, as well as apical growth of the plant. Analyzing research results allowed us to study the features of water regime of the studied species and reaction to extreme environmental factors. After a severe drought and two irrigations, it took about two days to restore the studied parameters to the initial values. Using the nonlinear regression equations, the dependencies are determined: Pn = f (I, E); E s), Ws = 55-70% FC. As an indicator of the response (reaction) of species to irrigation, we used the relative water flow rate in the plant shoot and changes in shoot diameter, as well as apical growth of the plant. Analyzing research results allowed us to study the features of water regime of the studied species and reaction to extreme environmental factors. After a severe drought and two irrigations, it took about two days to restore the studied parameters to the initial values. Using the nonlinear regression equations, the dependencies are determined: Pn = f (I, E); E = f (I, W); E s), Ws = 55-70% FC. As an indicator of the response (reaction) of species to irrigation, we used the relative water flow rate in the plant shoot and changes in shoot diameter, as well as apical growth of the plant. Analyzing research results allowed us to study the features of water regime of the studied species and reaction to extreme environmental factors. After a severe drought and two irrigations, it took about two days to restore the studied parameters to the initial values. Using the nonlinear regression equations, the dependencies are determined: Pn = f (I, E); E = f (I, W); E = f (Sf, d); Sf s), Ws = 55-70% FC. As an indicator of the response (reaction) of species to irrigation, we used the relative water flow rate in the plant shoot and changes in shoot diameter, as well as apical growth of the plant. Analyzing research results allowed us to study the features of water regime of the studied species and reaction to extreme environmental factors. After a severe drought and two irrigations, it took about two days to restore the studied parameters to the initial values. Using the nonlinear regression equations, the dependencies are determined: Pn = f (I, E); E = f (I, W); E = f (Sf, d); Sf = f (I, W). Association between the transpiration rate and the needles temperature under the influence of limiting environmental factors is determined. At a needles temperature above 35°C, the transpiration rate sharply decreases. Regression statistics for the parameters E and Tn: R s), Ws = 55-70% FC. As an indicator of the response (reaction) of species to irrigation, we used the relative water flow rate in the plant shoot and changes in shoot diameter, as well as apical growth of the plant. Analyzing research results allowed us to study the features of water regime of the studied species and reaction to extreme environmental factors. After a severe drought and two irrigations, it took about two days to restore the studied parameters to the initial values. Using the nonlinear regression equations, the dependencies are determined: Pn = f (I, E); E = f (I, W); E = f (Sf, d); Sf = f (I, W). Association between the transpiration rate and the needles temperature under the influence of limiting environmental factors is determined. At a needles temperature above 35°C, the transpiration rate sharply decreases. Regression statistics for the parameters E and Tn: R = 0,7794; R2 = 0,6076. When introducing this species into different regions, the results of our studies allow us to compare the hydrothermal characteristics that we obtained with the climatic conditions of a particular region and evaluate the possibilities of its cultivation.

Copyright

© 2020, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Oleg Ilnitsky
AU  - Yuri Plugatar
AU  - Andrey Pashtetsky
PY  - 2020
DA  - 2020/01/29
TI  - Features of Water Exchange of Pinus nigra subsp. pallasiana in Conditions of Southern Coast of Crimea
BT  - Proceedings of the International Scientific Conference The Fifth Technological Order: Prospects for the Development and Modernization of the Russian Agro-Industrial Sector (TFTS 2019)
PB  - Atlantis Press
SP  - 86
EP  - 90
SN  - 2352-5398
UR  - https://doi.org/10.2991/assehr.k.200113.145
DO  - 10.2991/assehr.k.200113.145
ID  - Ilnitsky2020
ER  -