Table 3.
Phytotoxic effect of digestate-derived compost on seed germination, radical elongation and germination index of cress (L. sativum) and radish (R. raphanistrum).
| Species | Treatments | GS 1 (n) | RE 2 (cm) | GI 3 (%) |
|---|---|---|---|---|
| Cress | Control (H2O) | 9.5 ± 0.6a | 11.0 ± 1.2a | 99.6 ± 2.5a |
| Compost 2.5% | 9.0 ± 1.2a | 10.8 ± 0.3a | 97.6 ± 1.8a | |
| Compost 5% | 7.5 ± 0.6b | 9.8 ± 0.5ab | 62.1 ± 2.3b | |
| Compost 10% | 5.5 ± 0.4c | 7.5 ± 0.6 b | 31.2 ± 1.2c | |
| Radish | Control (H2O) | 9.5 ± 0.3a | 13.1 ± 0.7a | 99.0 ± 1.3a |
| Compost 2.5% | 9.0 ± 0.8a | 12.9 ± 0.3a | 94.3 ± 1.5a | |
| Compost 5% | 6.5 ± 0.6b | 11.3 ± 0.1ab | 63.3 ± 3.2b | |
| Compost 10% | 4.5 ± 0.6c | 9.5 ± 0.6b | 32.7 ± 2.7c |
1 GS: germinated seed. 2 RE; radical elongation. 3 GI; germination index. Different letters in the same column per species indicate mean values significantly different at p < 0.05 according to one-way ANOVA combined with Tukey post hoc test. Data are expressed as the mean of three replicates ± SDs.