| Treatmenta | Days after harvest | Days after harvest | |||||||||
| 0 | 145 | 225 | 288 | 349b | 0 | 145 | 225 | 288 | 349 | ||
| Rootsc | Shootc | ||||||||||
| Biomass (t∙ha−1) | |||||||||||
| 0 - 0 | 1.61 a | 1.99 a | 2.11 a | 3.55 a | 1.73 a (5.17 a) | - | 5.51 a | 20.28 a | 27.83 b | 39.36 a | |
| 0 - 150 | 1.61 a | 1.68 a | 1.35 a | 2.54 b | 2.11 a (4.32 a) | - | 9.94 a | 22.62 a | 29.89 b | 40.50 a | |
| 120 - 0 | 2.29 a | 1.83 a | 2.26 a | 3.75 a | 2.13 a (4.52 a) | - | 8.52 a | 18.90 a | 35.55 a | 40.84 a | |
| 120 - 150 | 2.29 a | 2.35 a | 2.16 a | 2.56 b | 2.16 a (4.35 a) | - | 6.44 a | 18.24 a | 26.60 b | 39.92 a | |
| Average | 1.95 B | 1.97 B | 1.97 B | 3.10 A | 2.03 B | 7.60 D | 20.01 C | 29.97 B | 40.15 A | ||
| N content (g∙kg−1 N) | |||||||||||
| 0 - 0 | 4.75 a | 3.78 a | 4.90 a | 3.58 a | 4.58 a (4.00 a) | - | 9.38 b | 4.53 b | 3.68 a | 3.10 a | |
| 0 - 150 | 4.75 a | 4.48 a | 4.88 a | 4.55 a | 5.20 a (4.48 a) | - | 10.40 ab | 4.33 b | 3.33 a | 3.17 a | |
| 120 - 0 | 4.98 a | 3.20 a | 3.73 ab | 3.40 a | 5.03 a (4.45 a) | - | 9.85 b | 5.43 ab | 3.68 a | 3.15 a | |
| 120 - 150 | 4.98 a | 3.35 a | 3.40 b | 4.08 a | 4.68 a (3.95 a) | - | 11.10 a | 6.40 a | 3.48 a | 3.31 a | |
| Average | 4.86 A | 3.70 B | 4.23 AB | 3.90 B | 4.87 A | 10.18 A | 5.17 B | 3.54 C | 3.18 C | ||
| N accumulation (kg∙ha−1 N) | |||||||||||
| 0 - 0 | 7.58 a | 7.56 a | 9.99 a | 12.83 a | 7.95 a (20.64 a) | - | 50.94 c | 92.26 a | 102.07 b | 122.51 a | |
| 0 - 150 | 7.58 a | 7.45 a | 6.60 a | 11.53 a | 10.91 a (19.66 a) | - | 103.50 a | 97.68 a | 99.45 b | 128.49 a | |
| 120 - 0 | 11.16 a | 5.88 a | 8.52 a | 12.84 a | 10.59 a (19.95 a) | - | 82.67 ab | 101.25 a | 130.57 a | 142.10 a | |
| 120 - 150 | 11.16 a | 7.71 a | 7.20 a | 10.28 a | 10.07 a (16.92 a) | - | 71.30 bc | 115.85 a | 91.81 b | 137.25 a | |
| Average | 9.37 AB | 7.15 B | 8.08 B | 11.87 A | 9.88 AB | 77.10 C | 101.76 B | 105.98 B | 132.59 A | ||