Skip to main content

Lateral Root Morphology as an Expression of Sweetgum Seedling Quality

Buy Article:

$21.50 plus tax (Refund Policy)

Sweetgum seedlings from four open pollinated mother trees were grown in nursery beds infested with one of four vesicular-arbuscular mycorrhizal (VAM) fungi, and with available soil P levels (Bray II) adjusted to 50 ppm. Comparable beds had no VAM fungi present but had their available soil P levels adjusted to about 75, 100, 200, and 300 ppm. When lifted, the seedlings were placed in one of three morphological grades based upon number of permanent lateral roots exceeding 1 mm in diameter: Grade 1 seedlings had more than six roots; grade 2 between four and six roots; grade 3 had fewer than four roots. Approximately 50 percent of all seedlings fell within the inferior root grade 3 classification. Nursery mycorrhizal condition and phosphorus fertilization had no affect upon lateral root morphology of seedlings from the four seedlots. No significant biological differences in seedling heights were observed among the different root grades at lifting but root collar diameter (RCD) varied significantly among the grades in order: grade 1 > grade 2 > grade 3. One year after outplanting, effects of root grade were significant for both height and RCD: grade 1 > grade 2 > grade 3. Early first year seedling dieback and first year survival varied significantly among grades. Dieback percentages for grades 1, 2, and 3 were 41, 67, and 89 percent; survival averages for grades 1, 2, and 3 were 79, 67, and 51 percent. These data suggest that number of lateral roots on a sweetgum nursery seedling is an indicator of probable performance after outplanting. Forest Sci. 32:595-604.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Data/Media
No Metrics

Keywords: Liquidambar styraciflua; artificial regeneration; phosphorus fertilization; tree improvement programs; vesicular-arbuscular mycorrhizae

Document Type: Journal Article

Affiliations: Principal Silviculturist, USDA Forest Service, Institute for Mycorrhizal Research and Development, Forestry Sciences Laboratory, Athens, GA 30602

Publication date: 1986-09-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2016 Impact Factor: 1.782 (Rank 17/64 in forestry)

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
  • Submit a Paper
  • Membership Information
  • Author Guidelines
  • Podcasts
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more