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Title Transcription
ヒキミ エンシュウリン ニオケル テンネン スギ ノ ケンキュウ 3 ヒキミ エンシュウリン テンネンセイ スギ リヨウ ザイセキヒョウ ノ サクセイ
Title Alternative (English)
Studies on the Natural Sugi in the Shimane Agricultual College Forest of Hikimi(III) : On the Construction of Three Volume for Log Rule of Natural Regenerated "Sugi" (Cryptomeria japonica D. Don.) in Hikimi College Forest
File
language
jpn
Author
Yasui, Hitoshi
Narita, Tsunemi
Description
In the volume estimation and the evalution of a forest, a tree volume table for log rule may be more helpful and more accurate than the conventional table. We adopt Japanease Agricultual and Forestry Standard for calculation of logs in this study. Construct a tree volume table for log rule, 110 sample trees of natural regenerated "Sugi" were measured in Hikimi College Forest Data of sumple trees are shown in Table 1.
1. Starting from a following Yamamoto-Schumacher equation,
V = 10^a・D^b・H^c
We get a equation for practical use in this district, as folows
V = 0.0000178.D^<1.854497>・H^<1.304321>
where the adjustment coefficient of bias is 0.0038314. By this equation was made a tree volume for log rule, as shown in Table 2.
We find regrresion coefficient b, c and multiple and partial correlation coefficient are very signifficant. By the adoption of this table, the error rate for a tree may be 27 percent.
2. We have prepared a local tree volume table for log rule with the same data as shown in Table 3 by using a following equation,
V = 0.0005143・D^<2.6678346>
the error rate for a tree may be 43% by adopting this table.
3. Utilization percent (ratio of log content for log rule to tree content)correlates with D.b.h. and height of a tree, and we find a following equation ;
P = a.e^<-(b/D)>・e^<-(c/H)>
By applying this equation on all samples, we get
P = 1.50557・e^<-2.5934(1/D)>・^<-7.8647(1/H)>
We find regrresion coefficient and multiple and partial correlation coefficient are very siginficant. The relation between the log contents (v)and tree contents (V)for a tree can be expressed in following equation,
v = 0.893533 V-0.07955
Journal Title
島根農科大学研究報告
Volume
9
Start Page
(A-2)25-30
ISSN
05598311
Published Date
1961-03-31
NCID
AN00108241
Publisher
島根農科大学
Publisher Aalternative
The Shimane Agricultural College
NII Type
Departmental Bulletin Paper
OAI-PMH Set
Faculty of Life and Environmental Science
Remark
A,Bを含む
開学十周年記念号(Commemoration Number for the 10th Anniversary)
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