Study

Effects of shelterwood and site preparation on microclimate and establishment of white spruce seedlings in a boreal mixedwood forest

  • Published source details Man R. & Lieffers V.J. (1999) Effects of shelterwood and site preparation on microclimate and establishment of white spruce seedlings in a boreal mixedwood forest. The Forestry Chronicle, 75, 837-844

Actions

This study is summarised as evidence for the following.

Action Category

Use mechanical thinning before or after planting

Action Link
Forest Conservation

Prepare the ground before tree planting

Action Link
Forest Conservation
  1. Use mechanical thinning before or after planting

    A replicated, controlled study in 1993-1997 in boreal forest in Alberta, Canada (Man & Lieffers 1999) found that canopy cutting decreased the mortality of planted white spruce Picea glauca seedlings. Mortality was higher in uncut than i cut treatments (uncut: 22%: partial-cut: 8%-9%; clearcutting: 13%). Seedling height increase (uncut: 14 cm: partial-cut: 29-31 cm; clearcutting: 24 cm) and root-collar diameter (uncut: 5 mm: partial-cut: 7-8 mm; clearcutting: 8 mm) did not differ between treatments. Data were collected in 1997 in one uncut, two partial-cut (residual basal area of 9-16 m2/ha trembling aspen Populus tremuloides and 4 m2/ha white spruce) and one clearcutplots (150 × 150 m) in each of two blocks. Treatments and seedlings planting were in 1993-1994.

     

  2. Prepare the ground before tree planting

    A replicated, controlled study in 1994-1997 in boreal forest in Alberta, Canada (Man & Lieffers 1999) found that site preparation treatments decreased the mortality of planted white spruce Picea glauca seedlings. Mortality was higher in control than in soil removal and soil mixed plots (control: 23%: soil removal: 7%; soil mixed: 9%). Seedling height increase (control: 23 cm: soil removal: 24 cm; soil mixed: 27 cm) and root-collar diameter (control: 6 mm: soil removal: 7mm; soil mixed: 7 mm) were not different between treatments. Data were collected in 1997 in four plots comprised of three treatment subplots (100 × 33 m): control, soil removal (top 11-13 cm of soil removed) and soil mixed (top 11-13 cm of soil mixed), in each of two blocks. Treatments and seedling planting were undertaken in 1994.

     

Output references

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