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Growth of Hydrilla (Hydrilla verticillata) in Hydrosoils of Different Composition

Published online by Cambridge University Press:  12 June 2017

Kerry K. Steward
Kerry K. Steward*
Affiliation:
Aquatic Plant Manage. Lab., Agric. Res. Ser., U.S. Dep. Agric., Ft. Lauderdale, FL 33314
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Abstract

Hydrilla [Hydrilla verticillata (L. f.) Royle ♯ HYLLI] was cultured in flowing water in outside aquaria on rooting media differing in fertility and texture. Nutrient content was determined for rooting media at the beginning of the experiment and for plant tissues at harvest. Growth, as measured by rates of stem elongation, areal coverage of aquaria by plants, and biomass accrual, was highly related to N-, P-, and K-fertility of rooting media. Rooting media were the most important source of phosphorous since water supplies were not adequate to support plant growth. There was evidence of P-deficiencies in plants grown on infertile rooting media. Both N and K were adequately supplied from either water, rooting media, or both. Production of plant biomass was most closely related to P-levels in tissues which were closely related to supplies in rooting media. Pretest soil N (comparable to preestablishment conditions) was best related to biomass production, indicating that growth and establishment of hydrilla may be predictable through assessment of hydrosoil fertility. The need for sampling and analytical procedures to assess fertility is emphasized.

Keywords

Phosphorousnitrogenpotassiumaquatic weedsbiomass
Type
Weed Biology and Ecology
Information
Weed Science , Volume 32 , Issue 3 , May 1984 , pp. 371 - 375
Copyright
Copyright © 1984 by the Weed Science Society of America 

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References

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