Research Article
Ammonia Volatilization Losses from Paddy Fields under Controlled Irrigation with Different Drainage Treatments
Table 2
Ammonia volatilization losses from CWT1, CWT2, and CWT3.
| Treatment | AV losses (kg N ha−1) | Ratio of AV losses to applied (%) | During a week after fertilization | Seasonal | During a week after fertilization | Seasonal | BF II | TF | PF | BF II | TF | PF |
| CWT1 | 14.5 (0.4)ab | 17.4 (1.1)a | 7.6 (0.1)a | 59.8 (2.5)a | 22.4 (0.6)ab | 14.2 (0.9)a | 8.7 (0.1)a | 18.8 (0.8)a | CWT2 | 15.1 (0.4)a | 15.2 (2.1)a | 7.0 (1.1)a | 56.7 (3.1)ab | 23.4 (0.6)a | 12.4 (1.8)a | 8.0 (1.3)a | 17.8 (1.0)ab | CWT3 | 13.0 (1.5)b | 15.7 (1.6)a | 4.9 (0.7)b | 53.0 (1.3)b | 20.2 (2.4)b | 12.9 (1.3)a | 5.7 (0.8)b | 16.3 (0.4)b |
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Means in the same column followed by the same letter are not significantly different () by LSD. Numbers in parenthesis are standard deviation.
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