Table 4.
Amylopectin chain length distributions of superior and inferior grains of japonica rice under different PNF treatments.
| Variety | Position | PNF (kg ha−1) |
A Chain (%) |
B1 Chain (%) |
B2 Chain (%) |
B3 Chain (%) |
(A + B1)/(B2 + B3) | Amylopectin Average DP |
|---|---|---|---|---|---|---|---|---|
| Nanjing 9108 |
Superior grain | 0 | 28.60 ± 0.10 a | 47.21 ± 0.21 a | 10.83 ± 0.08 c | 13.36 ± 0.04 e | 3.13 ± 0.01 a | 20.76 ± 0.05 e |
| 60 | 27.16 ± 0.13 c | 46.82 ± 0.22 a | 11.36 ± 0.13 ab | 14.66 ± 0.06 cd | 2.84 ± 0.02 bc | 21.61 ± 0.05 c | ||
| 120 | 26.26 ± 0.12 f | 46.60 ± 0.21 a | 11.53 ± 0.14 a | 15.61 ± 0.19 ab | 2.72 ± 0.01 d | 22.12 ± 0.07 a | ||
| 180 | 26.51 ± 0.20 ef | 46.50 ± 0.16 a | 11.28 ± 0.03 ab | 15.76 ± 0.20 a | 2.70 ± 0.01 d | 22.12 ± 0.12 a | ||
| Inferior grain | 0 | 28.19 ± 0.10 b | 46.43 ± 0.16 a | 10.93 ± 0.04 c | 14.46 ± 0.11 d | 2.94 ± 0.01 b | 21.40 ± 0.14 d | |
| 60 | 26.94 ± 0.02 cd | 46.98 ± 0.04 a | 10.96 ± 0.12 c | 15.12 ± 0.06 bc | 2.83 ± 0.01 bc | 21.80 ± 0.01 bc | ||
| 120 | 26.70 ± 0.03 de | 46.96 ± 0.24 a | 11.11 ± 0.04 bc | 15.23 ± 0.15 ab | 2.80 ± 0.03 cd | 21.84 ± 0.13 b | ||
| 180 | 26.53 ± 0.15 ef | 47.01 ± 0.11 a | 11.08 ± 0.18 bc | 15.39 ± 0.22 ab | 2.78 ± 0.03 cd | 21.93 ± 0.11 ab | ||
| Nanjing 0212 |
Superior grain | 0 | 27.26 ± 0.07 b | 47.06 ± 0.25 a | 10.92 ± 0.16 ab | 14.76 ± 0.12 cd | 2.89 ± 0.02 ab | 21.62 ± 0.07 d |
| 60 | 26.71 ± 0.02 cd | 47.06 ± 0.18 a | 11.01 ± 0.12 a | 15.21 ± 0.15 bc | 2.81 ± 0.02 bc | 21.86 ± 0.10 bc | ||
| 120 | 26.28 ± 0.07 e | 47.02 ± 0.19 a | 11.08 ± 0.06 a | 15.61 ± 0.14 ab | 2.75 ± 0.01 c | 22.05 ± 0.08 ab | ||
| 180 | 26.36 ± 0.08 e | 46.82 ± 0.04 a | 11.04 ± 0.03 a | 15.78 ± 0.05 a | 2.73 ± 0.01 c | 22.13 ± 0.04 a | ||
| Inferior grain | 0 | 27.85 ± 0.15 a | 47.01 ± 0.07 a | 10.68 ± 0.08 b | 14.51 ± 0.19 d | 2.97 ± 0.04 a | 21.53 ± 0.03 d | |
| 60 | 26.77 ± 0.04 c | 47.17 ± 0.23 a | 10.96 ± 0.05 ab | 15.10 ± 0.14 bc | 2.84 ± 0.02 bc | 21.71 ± 0.07 cd | ||
| 120 | 26.88 ± 0.01 c | 46.80 ± 0.13 a | 10.88 ± 0.08 ab | 15.44 ± 0.21 ab | 2.80 ± 0.02 bc | 21.90 ± 0.10 bc | ||
| 180 | 26.44 ± 0.08 de | 47.03 ± 0.13 a | 11.02 ± 0.02 a | 15.52 ± 0.10 ab | 2.76 ± 0.01 c | 21.94 ± 0.09 ab |
Data are expressed as the mean ± SD (n = 3). Values in the same varieties and column with different letters are significantly different (p < 0.05). PNF: panicle nitrogen fertilizer.