Table 1. The C, N, P and K content in different winter wheat parts during various growth stages under different N treatments.
| Index | Treatment | Root (g kg−1) | Stems and leaves (g kg−1) | Grain (g kg−1) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jointing stage | Anthesis stage | Filling stage | Maturity stage | Jointing stage | Anthesis stage | Filling stage | Maturity stage | Filling stage | Maturity stage | ||
| TC | N0 | 407.98 b | 461.83 a | 429.55 a | 435.86 a | 436.91a | 393.69 b | 419.48 a | 405.30 a | 452.47 a | 435.64 b |
| N180 | 432.92 a | 433.07 b | 460.91 a | 435.64 a | 431.25 a | 408.67 b | 416.93 a | 403.74 a | 454.76 a | 452.02 a | |
| N300 | 425.39 a | 414.33 b | 434.11 a | 449.35 a | 448.64 a | 431.44 a | 396.23 a | 425.22 a | 446.60 a | 447.30 ab | |
| TN | N0 | 5.38 b | 3.65 b | 5.92 b | 4.67 c | 24.73 b | 13.01 b | 10.57 b | 4.51 b | 17.64 a | 20.63 b |
| N180 | 6.56 a | 4.75 a | 7.31 a | 6.96 a | 30.10 a | 16.16 a | 14.12 a | 4.78 b | 18.05 a | 28.45 a | |
| N300 | 5.54 ab | 4.48 a | 7.21 a | 5.86 b | 28.18 a | 18.00 a | 13.00 a | 6.00 a | 19.87 a | 24.07 ab | |
| TP | N0 | 1.48 a | 1.36 b | 1.42 a | 1.36 a | 3.24 a | 2.24 a | 1.98 a | 1.17 a | 4.11 a | 4.03 a |
| N180 | 1.61 a | 1.43 b | 1.43 a | 1.40 a | 3.01 a | 2.54 a | 1.83 a | 0.97 b | 3.96 a | 3.85 a | |
| N300 | 1.54 a | 1.64 a | 1.39 a | 1.34 a | 3.22 a | 2.47 a | 1.94 a | 1.22 a | 4.08 a | 3.83 a | |
| TK | N0 | 4.74 a | 4.09 a | 2.98 b | 2.63 a | 37.46 a | 21.35 b | 25.38 a | 25.87 a | 49.12 a | 9.33 a |
| N180 | 3.39 c | 2.46 b | 4.31 a | 2.62 a | 42.53 a | 23.53 ab | 31.12 a | 26.93 a | 48.06 a | 7.87 a | |
| N300 | 3.94 b | 2.76 b | 2.22 c | 2.76 a | 39.00 a | 27.59 a | 29.79 a | 29.02 a | 49.52 a | 8.23 a | |
Notes.
- TC
- Total carbon content
- TN
- Total nitrogen content
- TP
- Total phosphorus content
- TK
- Total potassium content
Different lowercase letters indicate significant differences between different treatments (P <0.05).