Skip to Main Content
Root and stem partitioning of Pinus taedaAuthor(s): Timothy J. Albaugh; H. Lee Allen; Lance W. Kress
Source: Trees, Vol. 20: 176-185
Publication Series: Scientific Journal (JRNL)
PDF: Download Publication (707 KB)
DescriptionWe measured root and stem mass at three sites (Piedmont (P), Coastal Plain (C), and Sandhills (S)) in the southeastern United States. Stand density, soil texture and drainage, genetic makeup and environmental conditions varied with site while differences in tree size at each site were induced with fertilizer additions. Across sites, root mass was about one half of stem mass when estimated on a per hectare basis. Stem mass per hectare explained 91% of the variation in root mass per hectare, while mean tree diameter at breast height (D), site, and site by measurement year were significant variables explaining an additional 6% of the variation in root mass per hectare. At the S site, the root stem ratio decreased from 0.7 to 0.5 when mean tree D increased from 10 to 22 cm. At the P and C sites, where mean root:stem ratios were 0.40 and 0.47, respectively, no significant slope in the root: stem to mean tree D relationship was found over a more narrow range in mean tree D (12-15 and 12-1 8 cm, respectively). Roots were observed in the deepest layers measured (190, 190, and 290 cm for the P, C, and S sites, respectively); however, the asymptotically decreasing root mass per layer indicated the bulk of roots were measured. Root growth relative to stem growth would need to change with increased mean tree D to explain the results observed here. While these changes in growth rate among plant components may differ across sites, stem mass alone does a good job of estimating root mass across sites.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- 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.
CitationAlbaugh, Timothy J.; Allen, H. Lee; Kress, Lance W. 2006. Root and stem partitioning of Pinus taeda. Trees, Vol. 20: 176-185
KeywordsRoot depth, soil characteristics, tree diameter, site
- Comparative water use in short-rotation Eucalyptus benthamii and Pinus taeda trees in the southern United States
- Stand structure in eastside old-growth ponderosa pine forests of Oregon and northern California.
- Forest floor CO2 flux from two contrasting ecosystems in the Southern Appalachians
XML: View XML