Compost rate (t・ha−1) | Pb mg・kg−1 | Cu mg・kg−1 | Zn mg・kg−1 | Ni mg・kg−1 |
0.0 | 0.24a | 1.22a | 11.52a | 2.23a |
34.7 | 0.89b | 2.01a | 11.93a | 2.26a |
56.6 | 0.91b | 2.00a | 12.87a | 2.49a |
74.1 | 1.04b | 5.51b | 18.73b | 2.70 a |
Mean | 0.77 | 2.69 | 13.76 | 2.42 |
Maximum permissible levels (mg・kg−1) | 5 | 40 | 99.4 | 40 |
l.s.d | 0.16 | 1.15 | 2.52 | 0.54 |
cv (%) | 10.13 | 21.50 | 9.20 | 11.2 |
p-value | <0.001 | <0.001 | 0.001 | 0.216 |