Radial Variation in the R_s-l in the SPAC of Several Tree Species - Collections

＜departmental bulletin paper＞
Radial Variation in the R_s-l in the SPAC of Several Tree Species

Creator	Creator Name Ikeda, Takefumi 池田, 武文 Affiliation Affiliation Name Department of Forestry, Faculty of Agriculture, Kyushu University 九州大学農学部林学科林学第三講座
Creator	Creator Name Suzaki, Tamio 須崎, 民雄 Affiliation Affiliation Name Department of Forestry, Faculty of Agriculture, Kyushu University 九州大学農学部林学科林学第三講座
Language	English
Publisher	Kyushu University
Publisher	九州大学農学部
Date	1987-12
Source Title	Journal of the Faculty of Agriculture, Kyushu University
Vol	32
Issue	1/2
First Page	1
Last Page	7
Publication Type	Version of Record
Access Rights	open access
Crossref DOI	https://doi.org/10.5109/23862
Related DOI	九州大学農学部紀要 \|\| 32(1/2) \|\| p1-7
	Journal of the Faculty of Agriculture, Kyushu University \|\| 32(1/2) \|\| p1-7
	http://www.agr.kyushu-u.ac.jp/
Related URI	九州大学農学部紀要 \|\| 32(1/2) \|\| p1-7
	Journal of the Faculty of Agriculture, Kyushu University \|\| 32(1/2) \|\| p1-7
	http://www.agr.kyushu-u.ac.jp/
Relation	九州大学農学部紀要 \|\| 32(1/2) \|\| p1-7
	Journal of the Faculty of Agriculture, Kyushu University \|\| 32(1/2) \|\| p1-7
	http://www.agr.kyushu-u.ac.jp/

File	FileType	Size	Views	Description
p001	pdf	287 KB	335

PISSN	0023-6152
NCID	AA00697606
Record ID	23862
Peer-Reviewed	Unrefereed
Subject Terms	SPAC
	Vessel
	Radial variation
	Growth ring
ISSN	0023-6152
NCID	AA00697606
Notes	To estimate the radial variation of axial conductance in the SPAC, diurnal trends in the sap flow velocity at the different depths in stem xylem and the xylem pressure potential were measured for three coniferous tree species and three broad-leaved tree species. Except for ring-porous wood species, the sap flow velocity increased with proximity to the cambial zone except in close proximity for coniferous and broad-leaved tree species. In the ring-porous wood species, the sap flow velocity in the earlywood vessels was larger than that in the latewood vessels. The sap flow velocity in the earlywood vessels of the current year’s growth ring was larger than in those of 1-year-old growth ring. The resistance to water flow at various depths in stem xylem of the SPAC could be estimated from a relationship between xylem pressure potential and heat pulse velocity. The resistance in the latewood vessels of Q. acutissima was about 4 to 7 times as large as that in the earlywood vessels. It can be estimated that the earlywood vessels will play an important role in water conduction of ring-porous wood species.
Created Date	2012.08.01
Modified Date	2022.11.11