Artikkelit jotka sisältää sanan 'stand management'
Katsaus viimeaikaisiin tutkimuksiin mustakuusen (Picea mariana) kasvatuksesta Pohjois-Ontarion turvemailla.
English title: Recent studies on black spruce management on peatlands in northern Ontario. A literature review.
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Black spruce (Picea mariana, (Mill.) B.S.P.) has been traditionally managed as evenaged stands with artificial or natural regeneration on peatlands of northern Ontario Clay Belt region. However, lack of resources to make artificial regeneration on all clear-cuts and harvest methods unfavorable for natural regeneration often resulted in unsatisfactory regeneration. As a consequence, alternative management methods have been introduced for peatland black spruce, and this literature review discusses studies of these methods. In natural stands, both evenaged and uneven-aged structures may be found, while the second-growth stands originating from old horse-logging are mostly uneven-aged, with abundant advance growth. Currently, mechanized harvest with regeneration protection has been shown to sufficiently preserve residual trees and subsequently produce stands that are heterogeneous with respect to the size structure. In second-growth stands, uneven-aged management can be implemented with minimum diameter limits determined from stand structure and cut-to-length harvesting. Such management perpetuates a stand structure appropriate for uneven-aged management. Simulation study has been made to estimate black spruce yield under uneven-aged management with varying cutting cycle and minimum diameter limit. It seems that in some peatland sites uneven-aged management is a possibility to manage black spruce.
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Hökkä,
The Finnish Forest Research Institute, Rovaniemi Research station, P.O. Box 16, FIN-96301 Rovaniemi, Finland
Sähköposti:
ei.tietoa@nn.oo
- Groot, Sähköposti: ei.tietoa@nn.oo
Harvennusmenetelmien vertailu ojitetun turvemaan männikössä. Simulointitutkimus.
English title: Comparison of thinning methods in a Scots pine stand on drained peatland. A simulation study.
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The post-drainage growth of a simulated model stand according to different thinning methods was predicted for 84 years by spatial single-tree growth models. In thinnings, the post-thinning stand density varied as a function of the distance of the ditch. The best yield and income were obtained by leaving the stand near ditches and extraction road midway between ditches denser than elsewhere.
Keywords: growth model, Pinus sylvestris, stand management
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Miina,
University of Joensuu, Faculty of Forestry, P.O.Box 111, FIN-80101 Joensuu, Finland
Sähköposti:
ei.tietoa@nn.oo
- Pukkala, Sähköposti: ei.tietoa@nn.oo
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