Table 1.
Relative growth rates of root-flooded Alternanthera philoxeroides in terms of plant fresh weight (RGRFW) and stem height (RGRH) under different nutrient and dissolved oxygen levels (means ± s.e., n = 10).
| Treatment | RGRFW | RGRH | |
|---|---|---|---|
| (mg g-1 day-1) | (cm cm-1 day-1) | ||
| Nutrient level | 5% | 38.2 ± 1.48 a | 0.0161 ± 0.0008 a |
| 50% | 52.7 ± 2.24 b | 0.0211 ± 0.0013 b | |
| 100% | 48.0 ± 2.26 b | 0.0202 ± 0.0010 b | |
| Dissolved oxygen level | 5% | 34.9 ± 3.79 a | 0.0190 ± 0.0011 a |
| 50% | 46.7 ± 1.51 b | 0.0229 ± 0.0013 b | |
| 100% | 45.6 ± 2.85 b | 0.0235 ± 0.0010 b | |
Three nutrient levels (5, 50, and 100% strength of standard Hoagland’s solution saturated with air) and three dissolved oxygen levels (5, 50, and 100% air saturation in 100% strength of Hoagland’s solution) were applied. Values within each column with different superscripts are significantly different at P < 0.05.