1990 Fiscal Year Final Research Report Summary

Effects of Multi-Storied Forest on Wood Quality

Research Project

Project/Area Number	01480067
Research Category	Grant-in-Aid for General Scientific Research (B)
Allocation Type	Single-year Grants
Research Field	林学
Research Institution	Iwate University
Principal Investigator	ANDO Takashi Iwate, Univ., Fac. Agr., Professor, 農学部, 教授 (90202788)
Co-Investigator(Kenkyū-buntansha)	SEKINO Noboru Iwate Univ., Fac. Acr., Associate Professor, 農学部, 助教授 (30171341) SAWABE Osamu Iwate Univ., Fac. Agr., Professor, 農学部, 教授 (90003780) SHIBATA Nobuaki Iwate Univ., Fac. Agr., Associate Professor, 農学部, 助教授 (70003762)
Project Period (FY)	1989 – 1990
Keywords	multi-storied forest / underplanting tree / Sugi (Cryptomeria japonica) / Hinoki (Chamaecyparis obtusa) / length of thacheid / juvenile wood / specific gravity / compressive strength
Research Abstract	The purpose of this report is to clear the wood qualities of Sugi (Cryptomeria japonica) and Hinoki (Chamaecyparis obtusa) of underplanting trees in two-storied forest compared with single-storied forest. When underplanting trees are grown up under suitable light conditions, no difference in length of tarcheids and rings from the pith of boundary of juvenile wood region between the underplanting and single-storied trees is recognized. Boundary of juvenile wood, whereas, for underplanting trees grown under poor light condition was larger than that of sutable light condition. The specific gravity of underplanting Sugi trees slightly higher than that of the single-storied ones. The same tendency is recognized in underplanting Hinoki trees under poor light condition. There is, however, no distinct difference between underplanting Hinoki trees under suitable light condition and single-storied ones. There is no significant difference in compressive strength for both species between underplanting and single-storied trees.