About Us | Help Videos | Contact Us | Subscriptions

Soil Science Society of America Journal Abstract - DIVISION S-7—FOREST & RANGE SOILS

Root Development of Young Loblolly Pine in Spodosols in Southeast Georgia


This article in SSSAJ

  1. Vol. 68 No. 2, p. 596-604
    Received: Jan 7, 2003

    * Corresponding author(s): nbc@mail.ifas.ufl.edu
Request Permissions

  1. H. G. Adegbidia,
  2. N. B. Comerford *b,
  3. E. J. Jokelac and
  4. N. F. Barrosd
  1. a 165 Boulevard Hébert, Université de Moncton—Campus d'Edmundston, Edmundston, New Brunswick E3V 2S8 Canada
    b Soil and Water Science Dep., 2169 McCarty Hall, Univ. of Florida, P.O. Box 110290, Gainesville, FL 32611-0290
    c School of Forest Resources and Conservation, Univ. of Florida, Gainesville, FL 32611
    d Departamento do Solos, Universidade Federal de Viçosa, Viçosa, Minas Gerais 36570-000 Brazil


Determining fine-root dynamics is fundamental to forest soil nutrient management yet root development of fast-growing loblolly pine (Pinus taeda L.) is poorly documented. The objectives of this study were to (i) investigate the spatial and temporal root development of loblolly pine; (ii) evaluate the relationship between root length, number of roots exiting a trench face, and root mass densities; and (iii) determine if there is a relationship between fine root and foliage mass as well as root and shoot mass during the early stages of stand development. Thirteen forest sites in southeastern Georgia covering ages 1 to 4 yr old were used. Roots temporal and spatial distributions were investigated using a trench method. The value of N X (# roots cm−2) was measured in August/September during the first 4 yr of stand development. Root density depth distributions fit a natural logarithm relationship with soil depth. An empirical model for root development over time was developed. A two-dimensional evaluation of root development showed that roots were present in 13 to >60% of the soil volume from Year 1 to Year 4. Regressions between root length density, L V (cm root cm−3 soil), and N X were weak until root mass and soil depth were included. Lastly, it was shown that the ratio of fine root mass/foliage mass was stable after the establishment phase, as was the ratio of root to shoot.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © 2004. Soil Science SocietySoil Science Society of America