Table 3.
Carbon and nitrogen status after rice harvest under different treatments of organic manures and inorganic fertilizers.
| Treatments | Organic Carbon (%) | Total Carbon (%) | Total Nitrogen (%) | Ammonium Nitrogen (mg kg−1) | Nitrate Nitrogen (mg kg−1) |
|---|---|---|---|---|---|
| Control | 0.95 | 1.00 ab | 0.077 c | 3.69 c | 1.56 b |
| RD | 0.96 | 1.02 ab | 0.073 c | 7.45 ab | 2.74 ab |
| PM5 + 50% RD | 1.05 | 1.18 a | 0.124 a | 9.21 ab | 3.55 a |
| PM2.5 + 75% RD | 0.99 | 1.03 ab | 0.086 bc | 9.29 a | 2.70 ab |
| VC5 + 50% RD | 1.03 | 1.14 a | 0.109 ab | 8.06 ab | 2.76 ab |
| VC2.5 + 75% RD | 0.95 | 1.02 ab | 0.099 abc | 8.32 ab | 1.92 b |
| FP | 0.92 | 0.94 b | 0.085 bc | 6.99 b | 1.61 b |
| S.E. (±) | 0.13 | 0.14 | 0.012 | 1.04 | 0.56 |
| CV (%) | 6.17 | 5.39 | 6.01 | 6.83 | 8.83 |
Means followed by the uncommon letter (s) are significantly different from each other at the 5% level of significance by DMRT. Note: RD = recommended inorganic fertilizers; PM = poultry manure; VC = vermicompost; FP = farmer’s practice.