Abstract
Relationships between regeneration density and various stand and site factors were explored in 10 partially cut blocks in the ICHmwl and ICHmk1 subzones of the Golden Forest District. The blocks were harvested between 4 and 12 years ago. Residual basal areas ranged from 2.4 m2 to 38m2. The majority of blocks sampled in this investigation had abundant regeneration and could be considered satisfactorily restocked. Regeneration density and time since harvest were significantly correlated regardless of post harvest treatment regime. Few other significant correlations were found.
Many site and stand factors can interact together to influence natural regeneration success. From observations made during this study it was concluded that shelter may not have been a requirement for natural regeneration establishment on the sites sampled. Other factors such as brush potential and site preparation may have more influence on regeneration establishment than the shelter provided by a residual basal area in the ICH. The influence of a residual overstory seems to be seed supply. Exceptions may include sites that have severe moisture deficits (steep south facing slopes) or frost prone areas. With more pressure to use alternatives to clearcutting, partial cutting is being used more frequently. On most sites in the ICH, residual basal area levels used will likely be more a function of seed crop, block size, and objectives for aesthetics and/or wildlife habitat than shelter.
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Updated April 12, 2007
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