Predicting decay and round-wood end use volume in trembling aspen (Populus tremuloides Michx.) |
| |
| Authors: | Robert Schneider Martin Riopel David Pothier Lévis Côté |
| |
| Institution: | 1. Département des sciences biologiques, Université du Québec à Montréal, succ. CV, c.p. 8888, H3C 3P8, Montréal, Qc, Canada
2. Département des sciences du bois et de la forêt, Université Laval, G1V 0A6, Québec, Qc, Canada
3. Ministère des Ressources naturelles et de la Faune, Gouvernement du Québec, 92, 2e rue ouest, bureau 207, G5L 8B3, Rimouski, Qc, Canada
|
| |
| Abstract: | ? In Quebec (Canada), predicting net merchantable volume of standing trees is essential to adjust stumpage fees. Furthermore, round-wood end use is important in the provincial forest management context because it is used to split the allowable annual cut among the different mill types. ? A method relying on linear, binomial and cumulative logit regressions is proposed to predict both decay volume and round-wood end use volume. Tree age, height and quality, as well as ecological region, stand origin and presence of Phellinus tremulae (Bond.) Bond. & Boriss. and Ceratocystis fimbriata (Ellis & Halst.) fungi are the main factors that contribute to the presence and the proportion of decayed merchantable volume. Once the net merchantable volume is estimated, its division into round-wood end use is estimated through a series of steps involving the presence of Phellinus tremulae, saw log height, stem quality and size as explanatory variables. The first step is a multinomial regression which predicts the number of end uses (pulp wood, low-grade saw logs, saw logs, low-grade veneer, and veneer) that are present in the stem. A series of logistic regressions then determines the presence of each end use, with linear regressions predicting the round-wood volume of each end use. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
