Skip to Main Content
Thermal Efficiency: A Possible Determinant of Height Growth Potential in Young Loblolly PinesAuthor(s): William D. Boyer
Source: Forest Sci. 22:279-282
Publication Series: Miscellaneous Publication
PDF: View PDF (74 KB)
DescriptionHeight growth of 10 loblolly pines (Pinus taeda L.) during one growing season ranged from 35.7 to 126.9 cm. Ninety-four percent of these tree-to-tree differences in height growth were accounted for by two thermal characteristics of each tree: (1) threshold temperature for growth and (2) growth rate per unit of heat above 40°F (4.4°C). These parameters were derived from the nocturnal growth of the first flush of three shoots per tree measured in late April and early May. Threshold temperature alone accounted for 62 percent of the differences in height growth. Growth rate alone had no significant effect. The parameters were more closely related to terminal shoot growth after the first flush (R2 = 0.80) than to first flush lengths alone (R2 = 0.66). Threshold temperatures ranged from 32.3°F (0.2°C) to 43.2°F (6.2°C) and averaged 385°F (3.6°C).
- 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.
CitationBoyer, William D. 1976. Thermal Efficiency: A Possible Determinant of Height Growth Potential in Young Loblolly Pines. Forest Sci. 22:279-282
KeywordsPinus taeda, temperature, heat units, selection, plant growth
- Shoot Growth Patterns of Young Loblolly Pine
- Seasonal Shoot and Needle Growth of Loblolly Pine Responds to Thinning, Fertilization, and Crown Position
- Foliage Sampling Guides for Loblolly Pine
XML: View XML