Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (239 KB bytes)

Title: Shoot Growth Patterns of Young Loblolly Pine

Author: Boyer, William D.;

Date: 1970

Source: Forest Science, Volume 16, Number 4, December 1970

Publication Series: Miscellaneous Publication

Description: Most shoot elongation on Pinus taeda L. seedlings and saplings near Durham. North Carolina. was supplied by the lirst growth Ilush, which began about April 1 and ended in mid-May 1967. New growth per shoot declined with distance from the tree top. All leaders had three flushes and half had four. Variation in internode growth was dependent upon growth rate, not length of growth period, which was remarkably uniform among all sampled shoots. Day-to-day shoot growth during the first lush was highly variable. During a 17-day period that accounted for 42 percent of total elongation of the first flush, degree-hour heat sums above 50°F and solar radiation in langleys per day accounted for 93 percent of the variation in total daily growth and 76 percent of the variation in diurnal growth. The effect of temperature was positive. and solar radiation negative. Heat sums alone accounted for 94 percent of the variation in nocturnal growth. The threshold temperature for shoot growth was about 40°F at night, and averaged 50°F during the day. The apparent threshold temperature for diurnal growth increased with increasing intensity oE solar radiation. Growth per unit or hear above threshold temperatures was almost the same during the day as at night.

Keywords: Pinus taeda, temperature, relative humidity, solar radiation.

Publication Notes:

  • 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 pubrequest@fs.fed.us to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)

XML: View XML

Citation:


Boyer, William D. 1970. Shoot Growth Patterns of Young Loblolly Pine. Forest Science, Volume 16, Number 4, December 1970

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.