Table 4 Effect of crop residue management practices and phosphorus levels on soil biological properties in the rice–wheat system (pooled data of 2 years).
Treatments | Microbial activity (0–15 cm) | |||||
|---|---|---|---|---|---|---|
Microbial count (CFU g–1 of dry soil) | Enzyme activity | |||||
Fungi (× 103) | Actinobacteria (× 105) | Total aerobic bacteria (× 106) | Dehydrogenase (µg TPF g–1 soil day-1) | Alkaline phosphatase (µg pnp released g-1soil h–1) | Urease (µg urea g–1 dry soil min–1) | |
CRM practices | ||||||
T1 | 25.9c | 33.7d | 37.9c | 4.29b | 25.2c | 3.63 |
T2 | 23.3c | 33.9d | 33.2c | 4.27b | 25.5c | 3.59 |
T3 | 36.7b | 44.2c | 49.5b | 5.11b | 31.2b | 4.43 |
T4 | 44.8b | 55.0b | 49.7b | 6.34a | 33.0b | 4.61 |
T5 | 53.2a | 64.0a | 59.6a | 6.70a | 38.5a | 4.88 |
T6 | 19.8c | 32.3d | 36.7c | 4.67b | 25.9c | 3.62 |
LSD (p ≤ 0.05) | 7.9 | 6.2 | 7.8 | 0.90 | 3.2 | NS |
Phosphorus levels | ||||||
P0 | 33.5 | 43.8 | 42.2 | 4.69c | 24.5b | 4.01 |
P1 | 32.7 | 43.6 | 45.0 | 5.10b | 32.1a | 4.27 |
P2 | 35.5 | 44.1 | 46.0 | 5.89a | 33.1a | 4.09 |
LSD (p ≤ 0.05) | NS | NS | NS | 0.60 | 2.3 | NS |
Interaction | NS | NS | NS | NS | NS | NS |
