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Culture of Hydrilla (Hydrilla verticillata) in Sand Root Media Amended with Three Fertilizers

Published online by Cambridge University Press:  12 June 2017

David L. Sutton
David L. Sutton*
Affiliation:
Univ. of Florida, IFAS, Fort Lauderdale Res. and Educ. Ctr., 3205 College Avenue, Fort Lauderdale, FL 33314
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Abstract

Hydrilla [Hydrilla verticillata (L.f.) Royle # HYLLI] was grown for 4 to 16 weeks in pans filled with either an organic muck-sand soil, sand, or sand mixed with Osmocote, Esmigran, and dolomite under outdoor conditions in plastic-lined pools with flowing pond water. Dry weight for plants cultured in sand plus the fertilizers was dependent on the concentration of fertilizer and was from 6 to 14 times that of plants cultured in sand alone. Dry weight was also higher for three treatments of sand amended with fertilizer than for plants cultured in the organic muck-sand soil. Water temperature for different growth periods influenced dry weight of hydrilla cultured with all three root media. Tuber production was independent of three levels of fertilizer for 16 weeks of plant growth, but plant weight was dependent on the concentration of nutrients in the root zone. Of nine plant tissue nutrients measured, only phosphorus in both the shoots and roots was dependent on the level of fertilizer in the root zone. This suggests that growth of hydrilla is controlled by nutrients in the root zone. The use of sand amended with various levels of fertilizers may be a way to simulate fertility levels of sediments as a method to study aquatic sites for their potential to support growth of hydrilla.

Keywords

Aquatic weedsbiomassnutrient uptakesedimentsHYLLI
Type
Weed Biology and Ecology
Information
Weed Science , Volume 34 , Issue 1 , January 1986 , pp. 34 - 39
Copyright
Copyright © 1986 by the Weed Science Society of America 

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References

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