Table 3
Main effect of nitrogen rate and variety and their interaction on meal yield and its chemical proprieties of RSM as fed (%). (Data under the nitrogen fertilizer treatment were averaged across varieties, and data under the variety treatment are averaged across fertilizer levels.)
| Source of variation | MY (kg ha−1) | DM (%) | PC (%) | NDF (%) | ADF (%) | ADL (%) | AC (%) |
|---|---|---|---|---|---|---|---|
| Nitrogen rate (N) (kg ha−1) | |||||||
| 0 | 1023 ± 68.5d | 87.2 ± 0.4c | 36.2 ± 0.7d | 28.0 ± 0.6a | 19.0 ± 0.9a | 7.5 ± 0.3a | 7.5 ± 0.6d |
| 30 | 1222 ± 65.8c | 87.2 ± 0.4c | 38.5 ± 0.6c | 27.8 ± 0.6a | 18.2 ± 0.9ab | 7.2 ± 0.3a | 8.9 ± 0.5cd |
| 60 | 1500 ± 65.8b | 87.7 ± 0.4bc | 41.3 ± 0.6b | 27.2 ± 0.6a | 17.1 ± 0.9ab | 6.4 ± 0.3b | 9.6 ± 0.5bc |
| 90 | 1657 ± 65.8ab | 88.6 ± 0.4ab | 42.6 ± 0.6b | 27.4 ± 0.6a | 16.1 ± 0.9bc | 6.2 ± 0.3b | 10.2 ± 0.5ab |
| 120 | 1786 ± 65.8a | 89.5 ± 0.4a | 44.9 ± 0.6a | 27.4 ± 0.6a | 14.9 ± 0.9c | 5.9 ± 0.3bc | 11.1 ± 0.5a |
| 150 | 1718 ± 65.8a | 89.1 ± 0.4a | 44.5 ± 0.6a | 27.0 ± 0.6a | 14.7 ± 0.9c | 5.4 ± 0.3c | 11.0 ± 0.5a |
| Variety (V) | |||||||
| Narjisse | 1543 ± 65.8ab | 88.3 ± 0.4a | 40.5 ± 0.6b | 28.3 ± 0.6a | 17.7 ± 0.9a | 6.00 ± 0.3b | 9.5 ± 0.5bc |
| Moufida | 1486 ± 68.5ab | 88.2 ± 0.4a | 39.5 ± 0.7b | 27.9 ± 0.6ab | 17.6 ± 0.9a | 7.57 ± 0.3a | 9.3 ± 0.6bc |
| Alia | 1538 ± 65.8ab | 88.4 ± 0.4a | 40.0 ± 0.6b | 27.5 ± 0.6ab | 15.9 ± 0.9ab | 6.44 ± 0.3b | 10.8 ± 0.5a |
| Adila | 1359 ± 65.8bc | 88.2 ± 0.4a | 44.1 ± 0.6a | 26.4 ± 0.6b | 16.3 ± 0.9ab | 6.22 ± 0.3b | 10.3 ± 0.5abc |
| Lila | 1284 ± 65.8c | 88.2 ± 0.4a | 40.9 ± 0.6b | 26.2 ± 0.6b | 15.7 ± 0.9b | 6.14 ± 0.3b | 10.7 ± 0.5ab |
| Trapper | 1696 ± 65.8a | 87.9 ± 0.4a | 42.9 ± 0.6a | 28.4 ± 0.6a | 16.7 ± 0.9a | 6.11 ± 0.3b | 7.7 ± 0.5d |
| ANOVA | |||||||
| N | *** | *** | *** | ns | *** | *** | *** |
| V | *** | ns | *** | *** | * | * | *** |
| N* V | ns | ns | ns | ns | ns | ns | ns |
ns: not significant; *, **, and ***: significant at 0.05, 0.01, and 0.001 probability level, respectively. Means within columns for N or V with different superscript are significantly different (P < 0.05). MY, meal yield; PC, protein content; NDF, neutral detergent fiber; ADF, acid detergent fiber; ADL, acid detergent lignin and AC, ash content.
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