講演詳細

生理部門[Tree Physiology]

日付	2024年3月8日
開始時刻	ポスター発表
会場名	531
講演番号	PG-6（学生ポスター賞審査対象）
発表題目	Estimating stem respiration for different temperature tree species by mass balance method Estimating stem respiration for different temperature tree species by mass balance method
所属	静岡大学
要旨本文	Most of the studies have assumed that stem respiration is equal to CO2 efflux at the stem surface measured with the chamber method. However, recent studies pointed out that a part of respired CO2 is transported by sap flow, and ignoring such internal CO2 flux can result in an underestimation of stem respiration. But, studies for internal CO2 flux are still limited, and species variations in internal CO2 flux are not explored sufficiently. We thus applied the mass-balanced approach to nine temperature species, to quantify internal flux by monitoring CO2 in the stem directly. The sap flow effect on stem respiration largely varied by species, from 65 % of total respiration in Quercus trees to only 0.5 % in Cryptomeria trees. Wood density did not explain this variation. We report relation with other anatomical characteristics, such as vessel diameter, and fraction of parenchyma tissues.
著者氏名	○WANG, XUANWEN2 ・ Saito, Kanata2 ・ Kitamura, Moe1 ・ Naramoto, Masaaki2 ・ Iio, Atsuhiro2
著者所属	1Shizuoka University ・ 2Shizuoka University
キーワード	stem respiration, CO2 flux, mass balance, species differences
Key word	stem respiration, CO2 flux, mass balance, species differences