Reduction of the crude protein in the diet of creole broilers in a semi-intensive system
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| Format: | Artículo científico |
| Sprache: | en |
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Universidad de Córdoba
2019
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| _version_ | 1876461199316484096 |
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| author | Cátia Borges-Ferreira |
| author_facet | Cátia Borges-Ferreira |
| contents | Reduction of the crude protein in the diet of creole broilers in a semi-intensive system Cátia Borges-Ferreira Sandra Regina Freitas-Pinheiro Dayane Josiane-Vieira Júlio Almeida-Silva Renata Gomes-Oliveira Rúbio Madureira de Souza-Carvalho Veterinaria nutrition Label rouge ideal protein Essential amino acids Objective. To evaluate the reduction of crude protein levels, without altering the ratio of essential amino acids, of free-range chickens, of one at 42 days old. Materials and methods. Two trials were performed comprising the initial phase (one to 21 days) and growth (22 to 42 days). A total of 630 chicks of the Redbro line of one day old, were distributed in a completely randomized design with five treatments and six replicates of 21 birds each, totaling 30 experimental units consisting of a shelter area and corrals. The levels reduced of crude protein for the initial phase were: 21.5, 21.0, 20.5, 20.0 and 19.5% and for the growth phase: 19.0, 18.5, 18.0, 17.5 and 17.0%. In all the treatments were maintained the minimum ratio between essential amino acids and lysine. The performance characteristics evaluated were: weight gain, feed intake and feed conversion. Results. There was no effect (p>0.05) of the crude protein reduction for any of the variables in all phases, except for feed conversion (p<0.05) that improved with 18.20% in the growth phase. Conclusions. Crude protein levels for chickens of the Redbro line, can be reduced to 19.5% and 18.2% for the initial and growth phases, respectively, provided that the ideal amino acid ratios are maintained with digestible lysine and meet the requirements of limiting amino acids. 2019 artículo científico 0122-0268 https://www.redalyc.org/articulo.oa?id=69360322016 https://www.redalyc.org/journal/693/69360322016/ https://www.redalyc.org/journal/693/69360322016/html/ https://www.redalyc.org/journal/693/69360322016/69360322016.epub https://www.redalyc.org/journal/693/69360322016/movil https://doi.org/10.21897/rmvz.1824 en http://www.redalyc.org/revista.oa?id=693 Revista MVZ Córdoba application/pdf Universidad de Córdoba Revista MVZ Córdoba (Colombia) Num.3 Vol.24 |
| format | Artículo científico |
| id | redalyc_69360322016 |
| institution | Redalyc |
| language | en |
| publishDate | 2019 |
| publisher | Universidad de Córdoba |
| spellingShingle | Reduction of the crude protein in the diet of creole broilers in a semi-intensive system Cátia Borges-Ferreira Veterinaria nutrition Label rouge ideal protein Essential amino acids Reduction of the crude protein in the diet of creole broilers in a semi-intensive system Cátia Borges-Ferreira Sandra Regina Freitas-Pinheiro Dayane Josiane-Vieira Júlio Almeida-Silva Renata Gomes-Oliveira Rúbio Madureira de Souza-Carvalho Veterinaria nutrition Label rouge ideal protein Essential amino acids Objective. To evaluate the reduction of crude protein levels, without altering the ratio of essential amino acids, of free-range chickens, of one at 42 days old. Materials and methods. Two trials were performed comprising the initial phase (one to 21 days) and growth (22 to 42 days). A total of 630 chicks of the Redbro line of one day old, were distributed in a completely randomized design with five treatments and six replicates of 21 birds each, totaling 30 experimental units consisting of a shelter area and corrals. The levels reduced of crude protein for the initial phase were: 21.5, 21.0, 20.5, 20.0 and 19.5% and for the growth phase: 19.0, 18.5, 18.0, 17.5 and 17.0%. In all the treatments were maintained the minimum ratio between essential amino acids and lysine. The performance characteristics evaluated were: weight gain, feed intake and feed conversion. Results. There was no effect (p>0.05) of the crude protein reduction for any of the variables in all phases, except for feed conversion (p<0.05) that improved with 18.20% in the growth phase. Conclusions. Crude protein levels for chickens of the Redbro line, can be reduced to 19.5% and 18.2% for the initial and growth phases, respectively, provided that the ideal amino acid ratios are maintained with digestible lysine and meet the requirements of limiting amino acids. 2019 artículo científico 0122-0268 https://www.redalyc.org/articulo.oa?id=69360322016 https://www.redalyc.org/journal/693/69360322016/ https://www.redalyc.org/journal/693/69360322016/html/ https://www.redalyc.org/journal/693/69360322016/69360322016.epub https://www.redalyc.org/journal/693/69360322016/movil https://doi.org/10.21897/rmvz.1824 en http://www.redalyc.org/revista.oa?id=693 Revista MVZ Córdoba application/pdf Universidad de Córdoba Revista MVZ Córdoba (Colombia) Num.3 Vol.24 |
| title | Reduction of the crude protein in the diet of creole broilers in a semi-intensive system |
| topic | Veterinaria nutrition Label rouge ideal protein Essential amino acids |
| url | https://www.redalyc.org/articulo.oa?id=69360322016 https://www.redalyc.org/journal/693/69360322016/ https://www.redalyc.org/journal/693/69360322016/html/ https://www.redalyc.org/journal/693/69360322016/69360322016.epub https://www.redalyc.org/journal/693/69360322016/movil https://doi.org/10.21897/rmvz.1824 |