Tom: 43 Strona: 5

Autorzy:
Jolanta Grala-Michalak
Katarzyna Kaźmierczak

Tytuł:
The approximation of tree volume based on measurements of biometric features of standing Scots pine trees

Język: Angielski

Słowa kluczowe:
diameter at breast height
height
stepwise regression
Scots pine (Pinus sylvestris L.)

Streszczenie:
The paper presents results of studies on a dependency between tree volume on basic stem measurements – dbh, height, double bark thickness, period increment in breast height diameter, period increment in height, age of trees and slenderness. Regression equations were developed for the estimation of tree volume. Material for analyses comprises results of measurements of 200 pine coming from 8 stands. All stands from which the experimental test trees derived grew on the fresh mixed coniferous forest sites situated in the Zielonka Experimental Forest District. Mean sample trees from the sample plot following the methodology developed by Draudt. In view of the statistically significant dependence between volume of pine and measured tree traits the analysis of regression was conducted, assuming the investigated traits (diameter at breast height, height, double bark thickness, 5-year increment in breast height diameter, 5-year increment in height, slenderness, age of trees) as explanatory variables. The backward stepwise regression was applied. Tree volume may be determined both on the basis of information on the height and diameter at breast height of a tree, double bark thickness and slenderness.

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