Evaluation of Exogenous Proteases in Broiler Diets
ABSTRACT This study aimed to evaluate the effects of different exogenous proteases in broiler diets on performance, metabolizable energy, and the crude protein (CP) digestibility values of diets. A total of 1440, 384, and 432 birds were distributed in a completely randomized design in the performanc...
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| Language: | English |
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Fundação APINCO de Ciência e Tecnologia Avícolas
2025-05-01
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| Series: | Brazilian Journal of Poultry Science |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2025000100315&lng=en&tlng=en |
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| author | BF Almeida CH Oliveira KMM Dias RD Bernardes SO Borges KM Gomes LP Castro RV Nunes AA Calderano |
| author_facet | BF Almeida CH Oliveira KMM Dias RD Bernardes SO Borges KM Gomes LP Castro RV Nunes AA Calderano |
| author_sort | BF Almeida |
| collection | DOAJ |
| description | ABSTRACT This study aimed to evaluate the effects of different exogenous proteases in broiler diets on performance, metabolizable energy, and the crude protein (CP) digestibility values of diets. A total of 1440, 384, and 432 birds were distributed in a completely randomized design in the performance, metabolism, and digestibility experiments, respectively. The treatments applied to the three experiments were: T1 - positive control (PC; basal diet, 23,23% CP in starter phase and 20,58% CP in grower/finisher phase); T2 - negative control (NC; 18,54% CP in starter phase and 18,46% CP in grower/finisher phase); T3 - NC added with Protease A; T4 - NC added with Protease B; T5 - NC added with Protease C; T6 - NC added with Protease D; T7 - NC added with Protease E; and T8 - NC added with Protease F, plus a treatment with a protein-free diet in the digestibility experiment. Reducing the protein level in the diet reduced BWG and worsened FCR. The proteases did not improve any of the performance parameters evaluated, except for protease C, which improved BWG, but not at a sufficient level to recover the lost performance, and not equal to CP. In addition, there were no differences in the metabolizable energy values. Furthermore, the proteases did not improve the standardized ileal digestibility of crude protein of diets with reduced protein. In conclusion, the supplementation of the tested proteases does not recover the growth performance lost by reducing the crude protein in the diet. |
| format | Article |
| id | doaj-art-a314e071d141421da5ee8fc554a6f2f7 |
| institution | OA Journals |
| issn | 1806-9061 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Fundação APINCO de Ciência e Tecnologia Avícolas |
| record_format | Article |
| series | Brazilian Journal of Poultry Science |
| spelling | doaj-art-a314e071d141421da5ee8fc554a6f2f72025-08-20T02:24:24ZengFundação APINCO de Ciência e Tecnologia AvícolasBrazilian Journal of Poultry Science1806-90612025-05-0127110.1590/1806-9061-2024-1981Evaluation of Exogenous Proteases in Broiler DietsBF Almeidahttps://orcid.org/0000-0003-1894-0562CH Oliveirahttps://orcid.org/0000-0001-8054-5550KMM Diashttps://orcid.org/0000-0002-1757-3011RD Bernardeshttps://orcid.org/0000-0001-7013-0650SO Borgeshttps://orcid.org/0000-0002-7695-7760KM Gomeshttps://orcid.org/0000-0002-2180-5209LP Castrohttps://orcid.org/0000-0003-4501-9226RV Nuneshttps://orcid.org/0000-0002-9376-2826AA Calderanohttps://orcid.org/0000-0002-2282-3580ABSTRACT This study aimed to evaluate the effects of different exogenous proteases in broiler diets on performance, metabolizable energy, and the crude protein (CP) digestibility values of diets. A total of 1440, 384, and 432 birds were distributed in a completely randomized design in the performance, metabolism, and digestibility experiments, respectively. The treatments applied to the three experiments were: T1 - positive control (PC; basal diet, 23,23% CP in starter phase and 20,58% CP in grower/finisher phase); T2 - negative control (NC; 18,54% CP in starter phase and 18,46% CP in grower/finisher phase); T3 - NC added with Protease A; T4 - NC added with Protease B; T5 - NC added with Protease C; T6 - NC added with Protease D; T7 - NC added with Protease E; and T8 - NC added with Protease F, plus a treatment with a protein-free diet in the digestibility experiment. Reducing the protein level in the diet reduced BWG and worsened FCR. The proteases did not improve any of the performance parameters evaluated, except for protease C, which improved BWG, but not at a sufficient level to recover the lost performance, and not equal to CP. In addition, there were no differences in the metabolizable energy values. Furthermore, the proteases did not improve the standardized ileal digestibility of crude protein of diets with reduced protein. In conclusion, the supplementation of the tested proteases does not recover the growth performance lost by reducing the crude protein in the diet.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2025000100315&lng=en&tlng=enPoultryperformancelow-protein dietprotease |
| spellingShingle | BF Almeida CH Oliveira KMM Dias RD Bernardes SO Borges KM Gomes LP Castro RV Nunes AA Calderano Evaluation of Exogenous Proteases in Broiler Diets Brazilian Journal of Poultry Science Poultry performance low-protein diet protease |
| title | Evaluation of Exogenous Proteases in Broiler Diets |
| title_full | Evaluation of Exogenous Proteases in Broiler Diets |
| title_fullStr | Evaluation of Exogenous Proteases in Broiler Diets |
| title_full_unstemmed | Evaluation of Exogenous Proteases in Broiler Diets |
| title_short | Evaluation of Exogenous Proteases in Broiler Diets |
| title_sort | evaluation of exogenous proteases in broiler diets |
| topic | Poultry performance low-protein diet protease |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2025000100315&lng=en&tlng=en |
| work_keys_str_mv | AT bfalmeida evaluationofexogenousproteasesinbroilerdiets AT choliveira evaluationofexogenousproteasesinbroilerdiets AT kmmdias evaluationofexogenousproteasesinbroilerdiets AT rdbernardes evaluationofexogenousproteasesinbroilerdiets AT soborges evaluationofexogenousproteasesinbroilerdiets AT kmgomes evaluationofexogenousproteasesinbroilerdiets AT lpcastro evaluationofexogenousproteasesinbroilerdiets AT rvnunes evaluationofexogenousproteasesinbroilerdiets AT aacalderano evaluationofexogenousproteasesinbroilerdiets |