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Silvicultural treatments for converting loblolly pine to longleaf pine dominance: Effects on resource availability and their relationships with planted longleaf pine seedlingsAuthor(s): Huifeng Hu; G.Geoff Wang; Joan L. Walker; Benjamin O. Knapp
Source: Forest Ecology and Management 282:115-123
Publication Series: Scientific Journal (JRNL)
Station: Southern Research Station
PDF: View PDF (365.79 KB)
DescriptionThroughout the southeastern United States, land managers are currently interested in converting loblolly pine (Pinus taeda L.) plantations to species rich longleaf pine (Pinus palustris Mill.) ecosystems. In a 3-year study on moderately well- to well-drained soils of the Lower Coastal Plain in North Carolina, we examined the effects of four canopy and three cultural treatments on plant resources and quantified relationships between plant resources and longleaf pine seedling survival and growth. Canopy treatments consisted of four levels of timber harvest applied to loblolly pine stands: Control (uncut, mean basal areas of 16.2m2/ha), Med BA (single-tree selection to a mean basal area of 6.4m2/ha), Low BA (single-tree selection to a mean basal area of 6.4 m2/ha), and Clearcut (complete canopy removal). Within each canopy treatment, we applied three cultural treatments designed to benefit the early growth of planted seedlings: no treatment (NT), herbicide (H), and herbicide plus fertilization (H+F). Gap light index (GLI) significantly differed among canopy treatments and nonlinearly increased with decreasing basal area. The H treatment resulted in higher temperatures at 10 cm in the soil. Canopy thinning increased foliar calcium (Ca) concentration. The annual root collar diameter (RCD) increment of planted longleaf pine seedlings was positively correlated with soil moisture. Our results confirm that light is an important factor controlling the growth of longleaf pine seedlings.
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CitationHu, Huifeng; Wang, G.Geoff; Walker, Joan L.; Knapp, Benjamin O. 2012. Silvicultural treatments for converting loblolly pine to longleaf pine dominance: Effects on resource availability and their relationships with planted longleaf pine seedlings. Forest Ecology and Management 282:115-123.
Keywordslongleaf pine seedlings, canopy treatments, converting loblolly pine
- Silvicultural treatments for converting loblolly pine to longleaf pine dominance: Effects on planted longleaf pine seedlings
- Restoring longleaf pine (Pinus palustris Mill.) in loblolly pine (Pinus taeda L.) stands: Effects of restoration treatments on natural loblolly pine regeneration
- Using silvicultural practices to regulate competition, resource availability, and growing conditions for Pinus palustris seedlings underplanted in Pinus taeda forests
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