Construction de tarifs de cubage d'arbres pour l'aulne glutineux (Alnus glutinosa (L.) Gaertn.)

Abstract

The construction of volume tables for black alder [Alnus glutinosa (L.) Gaertn.] trees growing in even-aged stands ofthe Southern Belgium. This article deals with the construction of tree volume tables for black alder (Alnus glutinosa (L.)Gaertn.) in the Southern part of Belgium. Regression equations are calculated for estimating the volume over bark from stumpto a top girth of 22 cm, excluding all branches. A total of 210 felled trees were used in this analysis and collected from 29even-aged stands of black alder located in a large range of ecological and silvicultural conditions in the Southern part ofBelgium. For the tree volume table construction, we have used measurements such as total height, girth at breast height andgirths at fixed heights. We have built equations by weighted least squares method for estimating volume of black alder treeexpressed as a function of one variable (girth at 1.3 m) or two independent variables (girth at 1.3 m and total height, girth at1.3 m and dominant height of the stand). The volume can also be converted in other volumes limited to fixed girths usingratios calculated from appropriate equations. The study is limited to black alder trees growing in even-aged stands of theSouthern Belgium.

Keywords

• Black alder
• Alnus glutinosa
• tree volumes tables
• volume equations
• Southern Belgium