Abstract
The aim of this study was to compare the effects of two soybean meals (S1, S2) and two palm meals (P1, P2) from solvent and expeller processing, and two cotton meals (C1, C2) both from solvent processing on the bioeconomic performances of broilers. 360 broilers Red Bro were fed six diets containing these meals. At starter phase (d 1 to 21 of age) only the diets S1 (solvent) and S2 (expeller) were used, while at grower phase (d 22 to 49 of age) the six diets were tested. Then, a balance experiment was carried out to evaluate the metabolism of nitrogen and energy.
Results showed similar feed intake in all diets at each phase. The body weight was significantly lower in S2 at d 21 (419 g in S1 vs 320 g in S2) and at d 49 (1531 g in S1 vs 1374 g in S2). At d 49, the highest average body weight (1543 g in C1) was significantly different from the lowest weight (1374 g in S2). However, the daily body weight gains (WG) were not affected by diets. The mortality rates were null at grower phase and similar at starter phase (2.4% in S1 vs 2.1% in S2). The feed conversion ratio was significantly lower in S1 than S2 at starter phase (1.9 vs 2.5), and similar later. The processing of soybean significantly affected the feed cost (FC) and the economic feed efficiency (EFE) during the starter phase. FC was 0.563 vbs 0.729 € / kg WG, and EFE was 2.9 vs 2.2 € WG / € feed, respectively in S1 and S2. At grower phase, the lowest FC (0.633 € / kg WG in C1) was significantly different from the highest (0.773 € / kg WG in S2). On the contrary, no significant effect of the processing technolkogy was noticed on the FC and the EFE with palm meals and cotton meals diets. The metabolizability of energy was affected by the diet, while it was the contrary for nitrogen. Computed per kg of metabolic body size (kg0.75), the daily intake of nitrogen was significantly affected by the processing technology of all three types of meals. On the contrary, only the processing technology of cotton meals had significant effect on the intake of ME.
It can be concluded that in Benin the processing of soybean meal had significant effects on bio-economic performances of broilers at starter phase, and on their body weight at grower phase.
Results showed similar feed intake in all diets at each phase. The body weight was significantly lower in S2 at d 21 (419 g in S1 vs 320 g in S2) and at d 49 (1531 g in S1 vs 1374 g in S2). At d 49, the highest average body weight (1543 g in C1) was significantly different from the lowest weight (1374 g in S2). However, the daily body weight gains (WG) were not affected by diets. The mortality rates were null at grower phase and similar at starter phase (2.4% in S1 vs 2.1% in S2). The feed conversion ratio was significantly lower in S1 than S2 at starter phase (1.9 vs 2.5), and similar later. The processing of soybean significantly affected the feed cost (FC) and the economic feed efficiency (EFE) during the starter phase. FC was 0.563 vbs 0.729 € / kg WG, and EFE was 2.9 vs 2.2 € WG / € feed, respectively in S1 and S2. At grower phase, the lowest FC (0.633 € / kg WG in C1) was significantly different from the highest (0.773 € / kg WG in S2). On the contrary, no significant effect of the processing technolkogy was noticed on the FC and the EFE with palm meals and cotton meals diets. The metabolizability of energy was affected by the diet, while it was the contrary for nitrogen. Computed per kg of metabolic body size (kg0.75), the daily intake of nitrogen was significantly affected by the processing technology of all three types of meals. On the contrary, only the processing technology of cotton meals had significant effect on the intake of ME.
It can be concluded that in Benin the processing of soybean meal had significant effects on bio-economic performances of broilers at starter phase, and on their body weight at grower phase.
| Originalsprog | Engelsk |
|---|---|
| Tidsskrift | Livestock Research for Rural Development |
| Vol/bind | 20 |
| Udgave nummer | 11 |
| Antal sider | 11 |
| ISSN | 0121-3784 |
| Status | Udgivet - 2008 |