TABLE 3.
Nitrogen accumulation and distribution proportion in different organs at flowering stage of winter wheat in 2018 and 2019 under different nitrogen application rates.
| Year | N treatments | Nitrogen accumulation amount (kg⋅hm–2) | Distribution proportion (%) | |||||
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| Spike axis+Husk | Leaf | Stem+Sheath | Total | Spike axis+Husk | Leaf | Stem+Sheath | ||
| 2018 | N0 | 11.23c | 20.02c | 20.69b | 51.94d | 21.57a | 38.46b | 39.97a |
| N75 | 15.64c | 30.73c | 26.41b | 72.78c | 21.67a | 42.17ab | 36.16ab | |
| N150 | 22.63b | 45.26b | 33.62ab | 101.51b | 22.42a | 44.55a | 33.03ab | |
| N225 | 29.65a | 56.34ab | 38.56a | 124.55a | 24.15a | 44.99a | 30.86b | |
| N300 | 32.85a | 60.35a | 42.16c | 135.36a | 24.15a | 44.44a | 31.41ab | |
| 2019 | N0 | 15.62c | 22.16e | 21.56b | 59.34e | 26.27a | 37.52b | 36.21a |
| N75 | 17.92bc | 32.85d | 26.39b | 77.16d | 23.27ab | 42.58ab | 34.15a | |
| N150 | 22.03b | 43.33c | 31.48ab | 96.84c | 22.78ab | 44.75a | 32.47a | |
| N225 | 26.54ab | 56.32b | 36.85a | 119.71b | 22.13ab | 47.16a | 30.71a | |
| N300 | 29.53a | 65.12a | 41.59c | 136.24a | 21.61b | 47.81a | 30.58a | |
N0: unfertilized control; N75: N application at 75 kg N⋅ha–1; N150: N application at 150 kg N⋅ha–1; N225: N application at 225 kg N⋅ha–1; N300: traditional N application rate of 300 kg N⋅ha–1. Different small letters show significant differences at p < 0.05.