Natural Reproduction of Grand Fir and Mountain Hemlock After Shelterwood Cutting in Central Oregon

摘要

The establishment and survival of grand fir and mountain hemlock seedlings in the Oregon Cascades were determined for a 2-year period following shelterwood cutting and a good seed crop. Mortality of both species was heavy; 71 percent of the fir and 90 percent of the hemlock seedlings initially established died. Number of seedlings per milacre was significantly correlated with amount of residual overstory.