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Seasonal development of loblolly pine lateral roots in response to stand density and fertilizationAuthor(s): M.A. Sword
Source: Plant and Soil. 200: 21-25.
Publication Series: Miscellaneous Publication
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DescriptionIn 1989, two levels each of stand density and fertilization treatments were factorially established in a 9-year-old loblolly pine plantation on a P-deficient Gulf Coastal Plain site in Rapides Parish, Louisiana, USA. In 1995, a second thinning was conducted on the previously thinned plots and fertilizer was re-applied to the previously fertilized plots. The morphology of new long lateral roots was evaluated at 2-week intervals in five Plexiglas rhizotrons per plot of two replications. The overall objective of this study was to evaluate the seasonal initiation of six morphological categories of long lateral roots (> 2.5 cm in length) in response to stand density and fertilization. Lateral root development exhibited a seasonal pattern with the initiation of branched lateral roots predominantly occurring in spring and summer. The initiation of non-branched lateral roots occurred throughout the year regardless of season. Stand density did not affect lateral root morphological development. However, fertilization stimulated the initiation of branched lateral roots that were greater than 1 mm in diameter.
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CitationSword, M.A. 1998. Seasonal development of loblolly pine lateral roots in response to stand density and fertilization. Plant and Soil. 200: 21-25.
- Seasonal Lateral Root Growth of Juvenile Loblolly Pine After Thinning and Fertilization on Gulf Coastal Plain Site
- Long-Term Trends In Loblolly Pine Productivity And Stand Characteristics In Response To Stand Density And Fertilization In The Western Gulf Region
- Seasonal Fine-Root Carbohydrate and Growth Relations of Plantation Loblolly Pine After Thinning and Fertilization
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