Modelling the number of rings in individual logs of Norway spruce
In timber production, there is a need to select the right log for a given end-product. To achieve this objective, individual tree characteristics (total height, diameter at breast height and age) and external measurements made on the log shape were combined. In this study, three possible methods are analyzed to assess the number of annual rings for a given #Picea abies# (L.) Karst. log using modelling. The first method consists of finding a link between the number of rings and the size, the taper and the location of the log in the tree. The second one is based on the log location in the tree and the use of an height-age growth model. The third involves the whorl location inside the log and the use of an individual height-age growth model. The three methods are compared on the basis of the amount of data required by each and error analysis.
Main Authors: | Saint André, Laurent, Hervé, Jean-Christophe, Leban, Jean-Michel |
---|---|
Format: | article biblioteca |
Language: | eng |
Subjects: | U10 - Informatique, mathématiques et statistiques, K10 - Production forestière, F62 - Physiologie végétale - Croissance et développement, Picea abies, cerne, modèle mathématique, contrôle continu, méthode statistique, http://aims.fao.org/aos/agrovoc/c_5852, http://aims.fao.org/aos/agrovoc/c_3399, http://aims.fao.org/aos/agrovoc/c_24199, http://aims.fao.org/aos/agrovoc/c_2736, http://aims.fao.org/aos/agrovoc/c_7377, |
Online Access: | http://agritrop.cirad.fr/476703/ http://agritrop.cirad.fr/476703/1/476703.pdf |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
Biaises in the estimation of size-dependent mortality models: advantages of a semiparametric approach
by: Vieilledent, Ghislain, et al. -
Relationships between stem size and branch basal diameter variability in Norway spruce (Picea abies (L.) Karsten) from two regions of France
by: Loubère, Michel, et al. -
Automatic detection of annual growth units on Picea abies logs using optical and X-Ray techniques
by: Longuetaud, Fleur, et al. -
An elliptical model for tree ring shape in transverse section. Methodology and case study on Norway Spruce
by: Saint André, Laurent, et al. -
Mortality of silver fir and Norway Spruce in the Western Alps - a semi-parametric approach combining size-dependent and growth-dependent mortality
by: Vieilledent, Ghislain, et al.