Plant and Soil

, Volume 37, Issue 2, pp 297–308 | Cite as

Nutrient uptake by tupelo gum and bald cypress from saturated or unsaturated soil

  • Richard E. Dickson
  • T. C. Broyer
  • C. M. Johnson


Seedlings of tupelo gum (Nyssa aquatica L.) and bald cypress (Taxodium distichum L. Rich.) were grown in pots containing a sphagnum moss-peat soil mix. Plants approximately 20 to 25 cm tall were subjected to three moisture treatments, saturated-aerated, saturated, and unsaturated soil; and three nitrogen fertilization treatments, control (no N added), urea (a reduced N source), and nitrate (an oxidized N source).

Data include dry weights (g/culture) of leaves, stems, and roots; concentrations (percentage of dry weight) and contents (mg/culture) of N, P, K, Ca, and Mg in leaves, stems, and roots. Total dry weight was greater for plants grown in saturated-aerated soil than in either saturated or unsaturated soil. Differences in nutrient absorption and distribution between the plants and among the water treatments were principally the result of growth differences produced by the water treatments. Element contents and often the concentrations of P, K, Ca, or Mg were highest in both species when grown on the saturated-aerated soil and lowest when grown on unsaturated soil. The low levels of N in plants grown on saturated soils were probably the result of denitrification, as shown by the greater content of N in plants grown on soil fertilized with urea as opposed to nitrate. Thus, urea would appear to be a better N source than nitrate for fertilization in swamp forests. Growth of, and nutrient uptake by cypress was restricted less than that of tupelo when the plants were grown on saturated as compared to saturated-aerated soil. Thus, cypress appeared more tolerant than tupelo to the anaerobic root environment found in saturated soil.


Urea Denitrification Water Treatment Unsaturated Soil Saturated Soil 
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Copyright information

© Martinus Nijhoff, The Hague 1972

Authors and Affiliations

  • Richard E. Dickson
    • 1
  • T. C. Broyer
    • 1
  • C. M. Johnson
    • 1
  1. 1.Department of Soils and Plant NutritionUniversity of CaliforniaBerkeley

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