Influence of potassium supply on growth and nutrient storage by water hyacinth

K. R. Reddy*, M. Agami, E. M. D'Angelo, J. C. Tucker

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The net productivity and nutrient storage of potassium (K), nitrogen (N), and phosphorus (P) by water hyacinth (Eichhornia crassipes [Mart.] Solms) were evaluated at several K concentrations in the culture medium (between 2 and 52 mg K liter-1) using 1000-liter outdoor tanks for a period of about 4 months. Maximum plant biomass (3·1 kg (dw) m-2) was reached at culture medium K concentrations of 12-52 mg K liter-1. Potassium storage in water hyacinth tissue steadily increased at K supplies of up to 52 mg K liter-1 with a maximum tissue K content of 72 mg K g-1. Maximum N and P storage in the plant biomass was reached at K concentrations of 12 and 22 mg K liter-1, respectively; further increases in K concentration did not increase either N or P storage.

Original languageEnglish
Pages (from-to)79-84
Number of pages6
JournalBioresource Technology
Volume37
Issue number1
DOIs
StatePublished - 1991
Externally publishedYes

Keywords

  • Aquatic plant
  • biomass production
  • nutrient uptake
  • wastewater treatment

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