講演詳細

生理部門[Tree Physiology]

日付	2026年3月17日
開始時刻	ポスター発表
会場名	多目的ホール
講演番号	PG-8
発表題目	Evaluating Hydraulic Integration in Fagus crenata by Sap Flow Measurement with Defoliation and Shading Treatments. Evaluating Hydraulic Integration in Fagus crenata by Sap Flow Measurement with Defoliation and Shading Treatments.
所属	UGSAS, Gifu University
要旨本文	Clarifying large intra-tree variations in radial and azimuthal sap flow profiles is vital for accurate stand-level transpiration estimates. Studies suggest old, shaded branches connect to inner xylem, while outer xylem connects to upper branches. Additionally, Fagus species tend to have low resistance to circumferential flow but high resistance to radial transport. To investigate F. crenata hydraulic integration, we defoliated or shaded lower and upper branches on three trees and monitored sap flow using Heat Field Deformation (HFD) sensors. Contrary to hypothesis, treating lower branches caused a larger reduction in outer xylem flow, while upper branch treatment reduced inner flow at several azimuths. Furthermore, reductions extended into xylem layers older than the treated branches, implying lower radial resistance. These findings suggest F. crenata is not simply integrated, emphasizing the importance of considering whole-tree architecture in estimating radial profiles.
著者氏名	○Qistan Naufal Faryzan1,2 ・ Masaaki Naramoto2 ・ Atsuhiro Iio2
著者所属	1The United Graduate School of Agricultural Science, Gifu University ・ 2Faculty of Agriculture, Shizuoka University
キーワード	heat field deformation methods, foliage removal, tree scale, azimuthal and radial sap flow, leaf-xylem connection
Key word	heat field deformation methods, foliage removal, tree scale, azimuthal and radial sap flow, leaf-xylem connection