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Type and Timing of Thinning Hybrid Poplar Coppice Affects Growth

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To optimize the growth of a hybrid poplar coppice plantation, a thinning trial was established in eastern Ontario. Four treatments were investigated: (1) thinning stools to one dominant sprout with residuals clipped at a height of 1 m (to increase operational efficiency of thinning), (2) thinning to one dominant sprout with residuals completely removed, (3) thinning to three dominant sprouts with residuals completely removed, and (4) no thinning. All treatments were performed at the beginning of either the third or fifth growing seasons (timing treatment one and two, respectively). When the 7-yr-old data were analyzed (i.e., 5 growing seasons after timing treatment one and 3 growing seasons after timing treatment two), thinning did not increase dominant sprout growth and significantly larger quantities of wood fiber were produced with lower thinning intensities or no thinning because of the greater number of sprouts per stool. Results of this trial suggest there is no advantage to thinning hybrid poplar coppice after the beginning of the third growing season. North. J. Appl. For. 8(4):166-168.

Document Type: Journal Article

Affiliations: Ontario Ministry of Natural Resources, P.O. Box 605, Oxford Ave., Brockville, Ontario K6V 5Y8

Publication date: 1991-12-01

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  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Northern Journal of Applied Forestry covers northeastern, midwestern, and boreal forests in the United States and Canada.
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