Skip to Main Content
Two-year stem curvature and growth responses of three full-sibling families of loblolly pine to five root/stem form treatmentsAuthor(s): Michael S. Murphy; Laurence R. Schimleck; Timothy B. Harrington; Richard F. Daniels
Source: Tree Planters' Notes. 61(2): 55-64.
Publication Series: Magazines or Trade Publications
Station: Pacific Northwest Research Station
PDF: Download Publication (2.0 MB)
DescriptionTo examine the effects of taproot deformity on stem curvature, 90 full-sibling loblolly pine (Pinus taeda L.) seedlings (30 seedlings each from 3 families) were planted with 5 root/stem form treatments: straight taproot (control treatment), straight taproot with underground obstruction, taproot planted with J-root form, taproot planted at a 45-degree angle, and a straight taproot with the stem pulled to a 45-degree angle. Significant treatment differences (P ≤ 0.05) were found in year 1 for stem diameter and frequency of interwhorl oscillations, and all variables differed significantly among families. Although no significant treatment effects existed in year 2, family differences in diameter at breast height, height, and frequency remained significant. In addition, amplitude of stem curvature was significant for the treatment-by-family interaction in year 2. No differences were found for treatment, family, or their interaction for stem biomass. Results suggest that stem curvature responses of loblolly pine were more attributable to genetics than to root/stem form.
- Visit PNW's Publication Request Page to request a hard copy of this publication.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationMurphy, Michael S.; Schimleck, Laurence R.; Harrington, Timothy B.; Daniels, Richard F. 2018. Two-year stem curvature and growth responses of three full-sibling families of loblolly pine to five root/stem form treatments. Tree Planters' Notes. 61(2): 55-64.
KeywordsSinuosity, taproot deformity, J-root planting.
- Stem Sinuosity of Loblolly Pine Seedlings as Influenced by Taproot Shape
- Stem Sinuosity, Tree Size, and Pest Injury of Machine-Planted Tress with and without Bent Taproots: A Comparison of Loblolly and Slash Pine
- Temporal and spacial aspects of root and stem sucrose metabolism in loblolly pine trees
XML: View XML