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Competing vegetation and pine growth response to silvicultural treatments in a six-year-old Piedmont loblolly pine plantation



Competing vegetation and pine growth response to silvicultural treatments in a six-year-old Piedmont loblolly pine plantation



Southern journal of applied forestry 15(3): 138-144



Combinations of two levels of site preparation (chop vs. shear, pile, and disk) with two levels of herbicide application (annual applications vs. none) resulted in distinct communities of competing vegetation, as well as differential pine growth in a six-year-old loblolly pine (Pinus taeda L.) plantation in the North Carolina Piedmont. Chopping resulted in communities dominated by hardwood tree species, while shear-pile-disk led to a more even distribution among competing plant growth forms. Herbicide treatment reduced the overall amount of vegetation substantially, but dramatically increased the relative abundance of certain species, many of which are known to be resistant to the herbicides used. Trees, especially hardwoods, had a significant negative impact on the current growth increment of planted pines. No significant relationships were detected between pine growth and amounts of other growth forms of competing vegetation, such as forbs, grasses, shrubs, or vines. Shear-pile-disk-treated plots had higher species richness, eveness, and diversity than chopped plots, particularly on plots not treated with herbicide.

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Accession: 002583764

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DOI: 10.1093/sjaf/15.3.138


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