Title: Longleaf pine bud development: influence of seedling nutrition
Author: Barnett, J. P.; Jackson, D. P.; Dumroese, R. K.
Source: In: Stanturf, John A., ed. 2010. Proceedings of the 14th biennial southern silvicultural research conference. Gen. Tech. Rep. SRS–121. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. 235-240.
Description: A subset of seedlings from a larger study (Jackson and others 2006, 2007) were selected and evaluated for two growing seasons to relate bud development, and root-collar diameter (RCD), and height growth with three nursery fertilization rates. We chose seedlings in the 0.5 (lowest), 2.0 (mid-range), and 4.0 (highest) mg of nitrogen per seedling treatments. Buds moved through three developmental phases and we confirmed that when RCD reached 25 mm (1 inch), seedlings were usually ≥ 10 cm (4 inches), had elongated buds, and were exiting the grass stage. After two growing seasons, heights greater than 10 cm (4 inches) were reached on 20, 60, and 65 percent of the 0.5, 2.0, and 4.0-N seedlings, respectively. On average, higher N rates yielded seedlings with larger RCDs, taller heights, and more seedlings exiting the grass stage. On an individual seedling basis, however, we detected a reduction in RCD increment growth with increasing RCD at outplanting across all fertilizer treatments. This phenomenon may be related to root binding, but we have insufficient data to confirm the nature of this response. Further studies are needed to resolve this issue.
View or Print this Publication (628 KB)
- 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.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication. (Please specify exactly
which publication you are requesting and your mailing address.)
Barnett, J. P.; Jackson, D. P.; Dumroese, R. K. 2010. Longleaf pine bud development: influence of seedling nutrition. In: Stanturf, John A., ed. 2010. Proceedings of the 14th biennial southern silvicultural research conference; 2007 February 26-March 1; Athens, GA. Gen. Tech. Rep. SRS–121. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. 235-240.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility