Table 1
Mean rate of release and standard error (mean ± SE) of NO3−-N, NH4+-N and PO43−-P from CDS.
| Duration of release (days) | NO3−-N (mg L−1 d−1) |
NH4+-N (mg L−1 d−1) |
PO43−-P (mg L−1 d−1) |
|---|---|---|---|
| 1–5 | 21.47 ± 0.30a | 22.42 ± 0.32a | 2.19 ± 0.05b |
| 6–10 | 16.14 ± 0.11a | 16.69 ± 0.11b | 1.61 ± 0.02c |
| 11–15 | 11.40 ± 0.19a | 13.96 ± 0.19b | 1.41 ± 0.01c |
| 16–20 | 5.55 ± 0.22a | 10.78 ± 0.22b | 1.11 ± 0.03c |
| ANOVA; F(3,8) | 650.45* | 650.46* | 392.97* |
Data in a row bearing different letters a, b or c are significantly different (p < 0.05; Tukey's HSD test) from each other. Data in a row bearing different letters are significantly different (p < 0.05; Tukey's HSD test) from each other. Data in the last row denote results of statistical analysis test by one-way ANOVA, indicating the effect of time on release rate of various nutrients.
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