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Avaliação da digestibilidade do concentrado proteico de soja associado a enzima protease em rações para frangos de corte nas fases pré-inicial e inicial
| Content Provider | Semantic Scholar |
|---|---|
| Author | Carvalho, J. C. |
| Copyright Year | 2017 |
| Abstract | This paper had the objective to evaluate the digestibility of soy protein concentrate (SPC) in broiler chicken feed during pre-starter and starter phases, and the effects of exogenous protease enzyme addition on nutrient digestibility. 240 male broiler chicks were used for the first phase, up to 7 days old, and 160 for the second phase, up to 18 days old, accommodated in galvanized battery cages. Birds were divided into four treatments, with were: negative control (reference feed), reference feed with 40% SPC (SPC) replacement, and its association with two different levels of protease enzyme (0.025%-SPC+E25 and 0.050%), with five repetitions. Feed and water were ad libitum. The total feces collection method was used, and the dry matter (DM) and nitrogen (N) contents of the experimental feeds and feces were analyzed. The results of the pre-starter phase for the dry matter metabolization coefficients (DMMC) were 44.41%, 45.06% and 48.79%, for the SPC, SPC+E25, and SPC+E50 treatments respectively. And the results for the brute protein metabolization coefficients (BPMC) were -23.33%, -15.32% and 17.35%, for the SPC, SPC+E25, and SPC+E50 treatments respectively. The results of the starter phase for the DMMC were 49.64%, 46.43% and 41.39% for the SPC, SPC+E25, and SPC+E50 treatments respectively. And the results for the BPMC were -0.41%, -2.68% and 1.12%, for the SPC, SPC+E25, and SPC+E50 treatments respectively. Comparing the treatments it was observed that the added enzyme on the starter phase didn't affect significantly (P>0.05) the metabolization index of DM and BP of SPC for chickens. However, on the pre-starter phase, there was a statistical difference (P<0.05) for BPMC on the SPC+E25 treatment, indicating that the enzyme at this level of inclusion can be an important tool for the increase of SPC protein digestibility. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://bdm.unb.br/bitstream/10483/19991/1/2017_J%C3%A9ssicaCabralCarvalho.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
