Ten-year response of northern hardwoods to irregular shelterwood in Québec скачать в хорошем качестве

Ten-year response of northern hardwoods to irregular shelterwood in Québec

Presented by Steve Bédard, M. Sc., Research Forester, Ministry of Natural Resources and Forests of Quebec. In 2009 we established an experimental study in Québec to compare hybrid single-tree and group selection cutting, which was the most prescribed treatment, with two novel variants of Irregular shelterwood. These treatments were also coupled with mechanical understory American beech control, soil scarification and deer exclusion. After 10 years, net growth was positive and similar for all the cutting treatments despite the difference of stand structure but was negative for the control. Mortality caused by the beech bark disease is an important factor explaining this difference. However, despite high beech mortality, its abundant regeneration in the cutting treatments as well as in the control indicate that this species will probably dominate in the future to the detriment of sugar maple and yellow birch which regeneration was heavily browsed.