作者: Zhaofei Fan , Qi Yao , Daniel Dey , Martin Spetich , Andrew Ezell
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摘要: Oak regeneration problems have been noted in the Missouri Ozarks and elsewhere eastern United States. Alteration of disturbance regimes, competition from nonoak species, high overstory stocking are believed to be major barriers that impede oak regeneration. We studied upland forests were harvested by both even-aged (clearcutting) uneven-aged (single-tree selection group selection) methods, focusing on differences among stands received alternative harvest treatments. Ten years after treatments, density generally increased with removal trees, but only clearcutting treatment resulted a statistically significant increase seedlings saplings over no (the control). There treatments relative proportions as whole or size classes Successful trees highly depends number advance reproduction is closely related site conditions such aspect bedrock geology. Both factors must considered when method promote chosen. Compared methods selection), favored red species white species.