Table 1. Nutrient composition content and pH (means ± SD) of six aquatic weed extracts and the aqueous ethanol control (as determined by the Soil, Water and Nutrient Management Laboratory of UF at Belle Glade).
| Elements (ppm) | pH | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Extracts | Al | B | Ca | Fe | K | Mg | P | Si | |
| Control | 0.05±0.03 | 0.09±0.05 | 2.09±0.40 | 0.04±0.01 | 1.63±0.11 | 0.57±0.06 | 0.14±0.04 | 0.10±0.04 | 7.23 |
| Muskgrass | 12.51±7.04 | 0.57±0.11 | 1517±1347 | 20.08±1.99 | 485.9±389.7 | 252.0±55.49 | 27.88±2.20 | 65.0±23.01 | 6.81 |
| Water hyacinth | 3.42±0.50 | 1.26±0.25 | 1409±966.1 | 6.39±1.41 | 636.8±528.2 | 236.6±9.00 | 43.79±28.14 | 44.83±14.5 | 5.97 |
| Water lettuce | 18.33±11.51 | 10.36±14.16 | 2070±1192 | 15.97±8.58 | 262.1±313.3 | 171.8±24.59 | 43.04±0.13 | 76.16±2.66 | 6.41 |
| Hydrilla | 15.55±3.05 | 0.59±0.16 | 1572±1426 | 20.82±3.54 | 502.1±424.7 | 256.1±54.64 | 28.30±3.14 | 64.99±22.02 | 6.85 |
| Filamentous algae | 3.37±0.46 | 1.21±0.30 | 1464±1044 | 6.51±1.66 | 628.7±515.7 | 238.3±8.46 | 44.21±28.38 | 48.43±14.93 | 7.18 |
| Duckweed | 19.89±10.77 | 10.97±15.16 | 2060±1215 | 16.19±8.93 | 263.2±315.3 | 174.7±26.56 | 43.35±0.66 | 79.81±4.05 | 7.12 |