Characterization of Scots Pine (Pinus sylvestris L.) Respiration at the Climax Stage of its Current Increment in Forest Steppe of Baikal Area
V. F. ZABUGA, G. A. ZABUGA
Angarsk State Technical Academy, 665835, Angarsk, Tchaikovsky str., 60
Keywords: Scots pine (Pinus sylvestris L.), tree stem, roots, branches, needles, tree respiration
Abstract
During the vegetational seasons in 1976-2005 respiration and growth of vegetative organs of model Scots pine trees at the climax stage of their current increment in forest steppe of Baikal area were studied. The study of respiration was based on the strong connection between respiration of vegetative organs, its growth and temperature. Respiration rate was measured using area-based and oven-dry weight estimation. Regardless of the basis of the study, vegetative organs respiration rate decreased from apical meristems in the direction of the organs’ base. The relation between respiration of above- and underground organs appeared to be 3 : 2 and almost 2 : 1 respectively. During the period of study the Scots pine respiration rate increased approximately by two; average area-based respiration rate amounted to 32,8 and 36,9 kg of CO2 respectively.
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