Indices de qualité de station du sapin baumier dans le sous-domaine écologique de la sapinière à bouleau blanc humide
| Autor: | Serge Lemay, Lucie Bertrand, Marius Pineau, Philippe Meek, Louis Bélanger, Sylvain Paquette, Steve Morel, Patrick Beauchesne, Jean Bégin |
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| Rok vydání: | 1995 |
| Předmět: | |
| Zdroj: | The Forestry Chronicle. 71:317-325 |
| ISSN: | 1499-9315 0015-7546 |
| DOI: | 10.5558/tfc71317-3 |
| Popis: | Balsam fir (Abies balsamea (L) Mill.) site indices (height at 50 years at stump height) were estimated for the principal ecological types of the boreal and humid balsam fir-white birch climatic subdomain in central Québec. Ecological types consisted of units homogeneous as to their geomorphological deposit, their drainage class and vegetation dynamic. Mean site index varied from 15.9 m for rich mesic seepage sites to 9.4 m for very thin and poorly drained sites. To the three productivity classes generally used for boreal balsam fir stands in Québec (Linteau 1955), our results demonstrated the need to recognize a fourth class to distinguish operational groups. Rich mesic seepage sites are clearly more productive than other mesic sites with which they were grouped in the past. The proposed classes are: 1) I+ (SI > 15 m) comprising rich seepage sites; 2) class I−, comprising mesic sites (SI from 13.5 to 15 m); 3) class II (SI from 10.5 to 13.4 m) which comprises sites that possess moderate growth limitations including imperfectly drained sites, thin (3/ha/year for classes I+, I− and II respectively. The principal ecological variables that influenced fertility of these boreal sites were drainage class and the presence of seepage. Soil depth and, to a point, soil texture were not very significative variables in this humid climatic zone. It must also be emphasized that all site indices of ecological types showed high variability. |
| Databáze: | OpenAIRE |
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