Table 4.
Orthogonal analysis for soil organic carbon, microbial biomass, and soil enzyme activity affected by fertilization in tillage systems.
| Contrast | SOC | MBC | Dehydrogenase | Acid phosphatase | Alkaline phosphatase | Urease | |
|---|---|---|---|---|---|---|---|
| NT | Chemical fertilizer alone (F3) | 16.30 | 122.09 | 43.70 | 143.51 | 2178.06 | 31.12 |
| Other fertilized treatments (F1, F2, F4, F5, F6, F7) | 16.23 | 341.41 | 78.96 | 183.08 | 2662.17 | 55.16 | |
| P | ns | ** | ** | ** | ** | ** | |
| Organic manure treatments (F1, F2, F4) | 16.35 | 314.50 | 80.76 | 178.66 | 2756.66 | 65.33 | |
| Chemical or combined fertilizers (F3, F5, F6, F7) | 16.20 | 306.75 | 68.80 | 176.50 | 2470.25 | 41.50 | |
| P | ns | ns | ** | ns | ** | ** | |
| Compost bearing treatments (F2, F4, F6, F7) | 16.22 | 349.37 | 81.60 | 189.12 | 2786.50 | 56.75 | |
| Without compost treatments (F1, F3, F5) | 16.26 | 257.61 | 63.70 | 161.83 | 2335.10 | 45.05 | |
| P | ns | ** | ** | ** | ** | ** | |
| Farmyard manure bearing treatments (F1, F4, F5, F7) | 16.25 | 355.62 | 80.41 | 187.87 | 2860.51 | 56.10 | |
| Without farmyard manure treatments (F2, F3, F6) | 16.23 | 249.33 | 65.30 | 163.50 | 2236.32 | 46.00 | |
| P | ns | ** | ** | ** | ** | ** | |
| MT | Chemical fertilizer alone (F3) | 16.15 | 80.12 | 37.70 | 135.12 | 2076.18 | 28.12 |
| Other fertilized treatments (F1, F2, F4, F5, F6, F7) | 16.27 | 297.36 | 74.71 | 171.83 | 2512.33 | 47.33 | |
| P | ns | ** | ** | ** | ** | ** | |
| Organic manure treatments (F1, F2, F4) | 16.38 | 289.33 | 77.26 | 169.33 | 2615.67 | 53.05 | |
| Chemical or combined fertilizers (F3, F5, F6, F7) | 16.22 | 250.51 | 63.55 | 164.50 | 2325.75 | 38.25 | |
| P | ns | ** | ** | ns | ** | ** | |
| Compost bearing treatments (F2, F4, F6, F7) | 16.27 | 310.50 | 77.72 | 179.75 | 2675.33 | 47.62 | |
| Without compost treatments (F1, F3, F5) | 16.23 | 209.33 | 58.36 | 149.00 | 2147.33 | 40.50 | |
| P | ns | ** | ** | ** | ** | ** | |
| Farmyard manure bearing treatments (F1, F4, F5, F7) | 16.28 | 307.25 | 76.02 | 172.50 | 2667.75 | 51.25 | |
| Without farmyard manure treatments (F2, F3, F6) | 16.21 | 211.72 | 60.63 | 158.66 | 2157.44 | 36.66 | |
| P | ns | ** | ** | ns | ** | ** | |
| CT | Chemical fertilizer alone (F3) | 16.20 | 40.00 | 31.70 | 126.50 | 1974.20 | 19.00 |
| Other fertilized treatments (F1, F2, F4, F5, F6, F7) | 16.24 | 235.08 | 67.96 | 158.08 | 2400.00 | 40.66 | |
| P | ns | ** | ** | ** | ** | ** | |
| Organic manure treatments (F1, F2, F4) | 16.33 | 204.16 | 68.76 | 155.01 | 2474.66 | 43.06 | |
| Chemical or combined fertilizers (F3, F5, F6, F7) | 16.16 | 209.50 | 58.30 | 152.50 | 2237.50 | 33.50 | |
| P | ** | ns | ** | ns | ** | ** | |
| Compost bearing treatments (F2, F4, F6, F7) | 16.24 | 255.62 | 73.85 | 170.37 | 2567.50 | 41.87 | |
| Without compost treatments (F1, F3, F5) | 16.23 | 142.66 | 48.03 | 131.16 | 2034.62 | 31.83 | |
| P | ns | ** | ** | ** | ** | ** | |
| Farmyard manure bearing treatments (F1, F4, F5, F7) | 16.23 | 246.87 | 67.90 | 153.37 | 2531.25 | 41.50 | |
| Without farmyard manure treatments (F2, F3, F6) | 16.23 | 154.34 | 55.96 | 153.83 | 2083.12 | 32.33 | |
| P | ns | ** | ** | ns | ** | ** |
F1, farmyard manure; F2, compost; F3, chemical fertilizers; F4, farmyard manure + compost; F5, farmyard manure + chemical fertilizers; F6, compost + chemical fertilizers; F7, farmyard manure + compost + chemical fertilizers; F8, control & NT, No-tillage; MT, minimum tillage; CT, conventional tillage. ns ,* and **: not significant, significant at p < 0.05 and p < 0.01 of probability, respectively.