Regeneration in Mixed Conifer Shelterwood Cuttings in the Cascade Range of Eastern Oregon

摘要

A survey of shelterwood cuttings in mixed conifer forests in the eastern Oregon Cascade Range showed that, on the average, shelterwood units were well stocked with a mixture of advance, natural subsequent, and planted reproduction of a number of species. Because of slow invasion by understory vegetation, frequent heavy seed crops, and adequate density of the overstory, natural regeneration was prolific on most units. Planting is recommended only as a supplemental reforestation method. Greater stocking was associated with increasing overstory density and more exposed mineral soil; such factors as aspect, slope, and elevation had a positive or negative relationship to stocking depending on the species and plant community.