Table 3.
Effects of inoculation with ACC deaminase-producing plant growth-promoting rhizobacteria (PGPRs) on root-adhering soil/root tissue (RAS/RT) ratio, soil aggregate stability, available N, available P and enzyme activities under non-drought (ND) and drought stress (DS) conditions.
| Drought stress | Treatment | RAS/RT | Aggregate stability (%) | Available N (mg/kg) | Available P (mg/kg) | Urease (mg/g) | Alkaline phosphatase (mg/kg) |
|---|---|---|---|---|---|---|---|
| ND | CK | 23.52±0.70d | 34.75±0.84d | 30.96±0.84c | 4.23±0.11d | 1.34±0.07c | 14.75±0.84d |
| T1 | 30.27±1.13c | 42.56±2.04c | 38.71±1.61b | 5.47±0.28b | 1.82±0.18b | 22.56±1.61c | |
| T2 | 31.17±2.59c | 42.95±0.87c | 39.04±0.87b | 5.67±0.08b | 1.91±0.04b | 25.95±0.87b | |
| T3 | 32.02±1.26c | 49.66±2.64b | 47.90±0.91a | 6.52±0.13a | 2.67±0.04a | 37.66±0.91a | |
| DS | CK | 33.15±0.97c | 43.20±1.17c | 20.47±0.66e | 2.60±0.06f | 0.88±0.08d | 9.20±0.66e |
| T1 | 41.61±1.87b | 51.69±1.90b | 26.16±0.94d | 3.13±0.05e | 1.35±0.19c | 14.19±0.94d | |
| T2 | 42.88±1.70b | 52.99±2.19b | 30.97±1.04c | 3.31±0.06e | 1.40±0.04c | 16.99±1.04d | |
| T3 | 51.87±2.73a | 60.34±1.45a | 39.61±0.88b | 4.72±0.08c | 1.97±0.12b | 24.34±0.88bc |
Values are the mean±SE (n=3). Different lowercase letters indicate significant differences according to Duncan’s multiple range test at the P<0.05 level.