Table 5 Estimated total N lost through nitrous oxide emission following seasonal split application of manure
Trts | First tomato crop | First rape crop | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Temporal interval (days after planting) | Mean rate of N2O emission (g ha−1 day−1) | Total N emitted for the period (kg ha−1) | Total N applied (kg ha−1) | % emitted N2O of applied N | Temporal interval (days after planting) | Mean rate of N2O emission (g ha−1 day−1) | Total N emitted for the period (kg ha−1) | Total N applied (kg ha−1) | % emitted N2O of applied N | |
T1 | 1–21 | 5.4 | 0.11 | – | – | 1–49 | 6.0 | 0.30 | – | – |
22–49 | 2.5 | 0.07 | – | – | 50–84 | 3.9 | 0.13 | – | – | |
50–63 | 2.8 | 0.04 | – | – | – | – | – | – | – | |
64–98 | 6.4 | 0.22 | – | – | – | – | – | – | – | |
Total | 0.44 | 0 | 0 | – | – | 0.43 | 0 | 0 | ||
T2 | 1–21 | 5.6 | 0.12 | – | 0.24 | 1–49 | 9.3 | 0.45 | – | 0.88 |
22–49 | 5.7 | 0.15 | – | 0.29 | 50–84 | 4.6 | 0.15 | – | 0.29 | |
50–63 | 5.7 | 0.07 | – | 0.14 | – | – | – | – | – | |
64–98 | 7.2 | 0.24 | – | 0.47 | – | – | – | – | – | |
Total | – | – | 0.58 | 51 | 1.14 | – | – | 0.60 | 51 | 1.18 |
T3 | 1–21 | 7.5 | 0.15 | – | 0.15 | 1–49 | 12.7 | 0.62 | – | 0.61 |
22–49 | 6.8 | 0.16 | – | 0.16 | 50–84 | 7.2 | 0.24 | – | 0.24 | |
50–63 | 6.5 | 0.08 | – | 0.08 | – | – | – | – | – | |
64–98 | 9.4 | 0.31 | – | 0.15 | – | – | – | – | – | |
Total | – | – | 0.70 | 102 | 0.69 | – | – | 0.86 | 102 | 0.84 |
Fpr | – | – | * | – | – | – | – | * | – | – |
LSD | – | – | 0.16 | – | – | – | – | 0.23 | – | – |
CV | – | – | 13.40 | – | – | – | – | 12.20 | – | – |
Second tomato crop | Second rape crop | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
T1 | 1–98 | 3.3 | 0.32 | – | – | 1–35 | 3.0 | 0.11 | – | – |
– | – | – | – | – | – | 36–84 | 4.3 | 0.21 | – | – |
Total | 0.32 | 0 | – | 0.32 | 0 | – | ||||
Trt2 | 1–98 | 5.1 | 0.50 | – | 0.98 | 1–35 | 5.2 | 0.18 | – | 0.35 |
– | – | – | – | – | – | 36–84 | 7.3 | 0.35 | – | 0.68 |
Total | 0.50 | 51 | 0.98 | – | – | 0.53 | 51 | 1.04 | ||
T3 | 1–98 | 5.9 | 0.58 | – | 0.57 | 1–35 | 7.7 | 0.27 | – | 0.26 |
– | – | – | – | – | – | 36–84 | 10.2 | 0.49 | – | 0.48 |
Total | – | – | 0.58 | 102 | 0.57 | – | – | 0.76 | 102 | 0.75 |
Fpr | – | – | * | – | – | – | – | * | – | – |
LSD | – | – | 0.14 | – | – | – | – | 0.24 | – | – |
CV | – | – | 15.70 | – | – | – | – | 8.80 | – | – |