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Stand Density Management From Stand To Forest Estate - Stand Level Impacts. SISCO 2002 WINTER MEETING. Frank Barber Forest Practices Branch Ministry of Forests March, 2001. Stand Level Impacts of Spacing:.
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SISCO 2002WINTER MEETING
Frank BarberForest Practices BranchMinistry of Forests
- species selection- pest/disease damage - stem defects (sweep, crook, forks) - windfirmness- piece size, stand operability and product diversity- LRF, mill productivity, harvesting/milling costs- merchantable volume and wood quality- Other linked treatments (prune/fert/CT)- Biodiversity/Wildlife Habitat- range- fire management- maximum density- employment
Sustainable Forest Management Plans
Industry responsible for silviculture
Guidelines for Developing Stand Density Management Regimes
Incremental Silviculture Strategies in B.C. providing the wise investments
Source: Incremental Silviculture Strategy for British Columbia (Atherton, 1999)Source: Guidelines for Determining Stand Density Management Regimes, 1999.
Marginal Log piece size concept
25-30 cm break-even piece size
merchantable volume is > 25 cm
Source: SouthVancouver Island District, 2001
Data suggests the marginal log piece size on the coast is roughly 25-28 cm depending on equipment
Source:Potential financial returns from alternative silvicultural prescriptions in B.C. second-growth (Howard & Temesgen, 1997)
Pre-commercial Hw Thinning Trial, Olympia Peninsula, Wash. (Site Index 36 m; 38 year results)
Source: FORINTEK (2001)
Only a 5 cm shift in piece size
128 versus 100 piles of lumberin same shift
Source: Crop Planning from the logger’s viewpoint, or the economic benefits of bigger trees (Rotherham & Mooney, 1989)
mill handles 30 - 2.4 m logs/min 350 min per shift 10,500 logs 12.7 cm logs/shift = 65 MBF/shift 25 cm logs/shift = 336 MBF/shift A difference of $95,000 /shift
Source: Barbour, 1999. USDA FS, PNW Research Station
- Spacing can have a significant impact on CT viability- Commercial thinning can have major impacts on timber supply- Limited CT opportunities exist in natural unspaced stands that are at high densities
Source: Silviculture: Concepts and Applications, (Nyland, 1996) /Source: Enhanced Forestry Management Workshop - Stand Density Management (Edmonton - 1997)/Source: Commercial Thinning Workshop, Whitecourt, Alta, (Day, 1997)/Source: An Econ. Eval. of Commercial Thinning Douglas-fir in the Coastal Region of B.C. (Stone, 1993)/Source: Guidelines for Developing Stand Density Management Regimes (1999)Source: Guidelines for Commercial Thinning (1999)