A model for determining optimal clear-cut strip width for black spruce harvest and regeneration

Abstract

Clear-cut strip width determination for harvest and regeneration operations is illustrated by a deterministic simulation model. Model components are also presented for expressing future strip yields as a function of density in terms of trees per unit area and mean diameter with both of these independent variables varying across the strip. Future density and diameter in turn are expressed as functions of clear-cut strip width, seed dispersal, germination rate, type of seedbed, and survival of the regenerated stand. The model is emphasized as a tool for synthesizing research knowledge for silvicultural decisions. An example for black spruce is developed based primarily on limited data from northern Ontario. Preliminary trials indicate that for any given rotation age of 60 years or more, yields vary little over a wide range of clear-cut strip widths. Suggestions are made for refinement of the model to provide definitive results for more specific geographical areas.