Plant and Soil

, Volume 183, Issue 1, pp 79–84 | Cite as

Root distribution of grapefruit trees under dry granular broadcast vs. fertigation method

  • M. Zhang
  • A. K. Alva
  • Y. C. Li
  • D. V. Calvert


The aim of this study was to determine the effects of nitrogen (N) fertilization methods on root distribution and mineral element concentrations of White Marsh grapefruit (Citrus paradisi MacFadyen) trees on sour orange (C. aurantium Lush) rootstock on a poorly drained soil. At 0–15 cm depth of soil, root density was significantly greater for trees receiving 112 kg N ha-1 yr-1 as dry granular broadcast than those receiving the same amount of N as fertigation. Of the total roots in the top 60 cm soil, >75% was at 0–15 cm and <10% was at 30–60 cm. Root density was greatest near the emitter. Nitrogen concentration of roots was greater for the trees which received fertigation as compared to the trees which received dry fertilizer broadcast or no N.

Key words

dry granular fertilizer fertigation irrigation root density poorly drained soil root mineral nutrition 


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Copyright information

© Kluwer Academic Publishers 1996

Authors and Affiliations

  • M. Zhang
    • 1
  • A. K. Alva
    • 2
  • Y. C. Li
    • 1
  • D. V. Calvert
    • 1
  1. 1.Institute of Food and Agricultural Sciences, Indian River Research and Education CenterUniversity of FloridaFort PierceUSA
  2. 2.Institute of Food and Agricultural Sciences, Citrus Research and Education CenterUniversity of FloridaLake AlfredUSA

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