Assessment of scots pine (Pinus sylvestris L.) respiration at culmination stage of its current growth in forest-steppe zone of Pre-Baikal area

作者：Zabuga V F^*; Zabuga G A

来源：Contemporary Problems of Ecology, 2014, 7(1): 72-83.

DOI：10.1134/S199542551401017X

• Scots pine (Pinus sylvestris L.)
• stem
• roots
• branches
• needle
• respiration of a tree

Respiration and growth of vegetative organs of the Scotch pine model trees have been studied at the culmination stage of its current growth in forest-steppe zone of Pre-Baikal area during vegetation periods in 1976-2005. The presence of a close relationship between vegetative organ respiration and the temperature and processes of their growth is the basis of the assessment of respiration, a calculation of the intensity of which is performed per the surface and absolute dry mass (a.d.m.) of these organs. Regardless of the basis for calculating the respiration rate in the studied organs, its value decreases from apical meristems towards the base of organs. The ratio between the total respiration of over- and underground pine organs during its calculation per the surface and a.d.m. was 3: 2 and almost 2: 1, respectively. The pine respiration increased approximately two times from the beginning to the end of the observation period (regardless of the base of calculation its intensity), while its average value calculated per the surface and a.d.m. during this period was 32.8 and 36.9 kg CO2, respectively.

• 出版日期2014-2