Table 3. The impact of nitrogen fertilizer application methods on nitrogen uptake, chlorophyll contents, photosynthesis rate, agronomic N use efficiency (ANUE), and partial factors productivity of applied N (PFP) of transplanted fine rice.
| Treatment | Leaf N concentration (mg N g−1 leaf DW) | Chlorophyll Content (mgg−1 leaf FW) | Photosynthetic Rate (μmolm−2 s−1) | ANUE (kg grain kg−1 N) | PFP (kg grain kg−1 N) |
|---|---|---|---|---|---|
| 2017–18 | |||||
| Varieties | |||||
| V1 | 25.97 a | 2.33 a | 14.21 a | 18.14 a | 51.57 a |
| V2 | 23.90 b | 2.25 b | 13.16 b | 17.54 b | 48.83 b |
| LSD 0.05 | 0.84 | 0.04 | 0.28 | 1.66 | 1.33 |
| N-fertilizer application methods | |||||
| F1 | 20.12 c | 1.16 c | 10.80 c | - | - |
| F2 | 25.58 b | 2.32 b | 13.95 b | 18.72 b | 67.26 b |
| F3 | 29.10 a | 3.39 a | 16.29 a | 34.80 a | 83.33 a |
| LSD 0.05 | 1.03 | 0.05 | 0.35 | 2.03 | 1.63 |
| Varieties × N-fertilizer application methods | |||||
| V1F1 | 20.89 d | 1.22 c | 11.28 e | - | - |
| V1F2 | 26.56 b | 2.35 b | 14.64 c | 18.11 c | 68.26 c |
| V1F3 | 30.45 a | 3.41 a | 16.71 a | 36.30 a | 86.44 a |
| V2F1 | 19.34 e | 1.10 d | 10.32 f | - | - |
| V2F2 | 24.60 c | 2.29 b | 13.26 d | 19.33 c | 66.26 c |
| V2F3 | 27.75 b | 3.36 a | 15.88 b | 33.30 b | 80.22 b |
| LSD 0.05 | 1.46 | 0.07 | 0.49 | 2.87 | 2.30 |
| 2018–19 | |||||
| Varieties | |||||
| V1 | 24.96 a | 2.40 a | 13.07 a | 19.12 a | 51.72 a |
| V2 | 22.89 b | 2.22 b | 13.37 a | 19.01 a | 49.93 b |
| LSD 0.05 | 0.86 | 0.05 | 0.31 | 0.64 | 0.85 |
| N-fertilizer application methods | |||||
| F1 | 19.06 c | 1.33 c | 10.43 c | - | - |
| F2 | 24.51 b | 2.32 b | 13.26 b | 20.04 b | 67.67 b |
| F3 | 28.21 a | 3.29 a | 15.97 a | 37.17 a | 84.80 a |
| LSD 0.05 | 1.07 | 0.06 | 0.38 | 0.79 | 1.05 |
| Varieties × N-fertilizer application methods | |||||
| V1F1 | 19.79 d | 1.44 d | 10.20 d | - | - |
| V1F2 | 29.55 b | 3.29 b | 15.60 c | 38.03 d | 86.92 c |
| V1F3 | 25.53 a | 2.47 a | 13.40 a | 19.33 a | 68.22 a |
| V2F1 | 18.33 d | 1.21 e | 10.66 d | - | - |
| V2F2 | 23.47 c | 2.16 c | 13.11 c | 20.74 c | 67.11 c |
| V2F3 | 26.86 b | 3.28 a | 16.33 a | 36.29 b | 82.66 b |
| LSD 0.05 | 1.48 | 0.08 | 0.54 | 1.11 | 1.48 |
V1 = Basmati-515, V2 = Super basmati, F1 = Control, F2 = Broadcasting, F3 = Deep Placement, Means followed by same letters within a column are statistically non-significant, - = calculation not possible due to no N application.