Influence of Sediment Nutrients on Growth of Emergent Hygrophila

Hanlon, David L. and Dingler, Peter M. (2000) Influence of Sediment Nutrients on Growth of Emergent Hygrophila. Journal of Aquatic Plant Management, 38, pp. 55-61.

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Hygrophila ( Hygrophila polysperma (Roxb.) T. Anderson) is a plants which forms serious aquatic weed problems. Both submerged and emergent growth forms occur. Nutritional studies with a controlled release fertilizer and sediments collected from hygrophila-infested areas were conducted with the emergent growth habit to provide insights into growth of this introduced plant. Plant dry weights for experimental 16- week culture periods with low average temperatures were associated with low amounts of hygrophila biomass as compared to culture periods with high average temperatures. Hygrophila cultured in sand rooting media with the controlled release fertilizer produced as much as 20 times more dry weight than plants cultured in sediments only. First-degree linear regression statistics showed hygrophila dry weights were highly related to ammonia nitrogen, magnesium, sodium, and pH values in the sediments. These findings show the close relationship of the emergent growth habit of hygrophila to sediment nutrients. Analyses for certain sediment characteristics may provide an indication of the potential growth that may be expected for weed infestations of this plant. Hygrophila grows year round in south Florida; however, visual observations of canals and other bodies of water indicate that lower amounts of hygrophila plants occur during the cooler months of year than during the summer season. These findings show the seasonal growth of emergent hygrophila occurs with biomass dependent on both sediment nutrients and temperature.

Item Type: Article
Title: Influence of Sediment Nutrients on Growth of Emergent Hygrophila
Personal Creator/Author:
Hanlon, David L.
Dingler, Peter M.
Refereed: Yes
Journal or Publication Title: Journal of Aquatic Plant Management
Volume: 38
Page Range: pp. 55-61
Date: 2000
Issuing Agency: Aquatic Plant Management Society, Inc.
Uncontrolled Keywords: Hygrophila polysperma, invasive plant, aquatic weed, plant nutrition
Subjects: Management
Item ID: 1836
Depositing User: Stephanie Haas
Date Deposited: 14 Feb 2009 16:43
Last Modified: 29 Sep 2011 20:00

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