Metabolizable energy values of diets supplemented with xylanase determined with laying hens
The objective of this study was to evaluate the effect of the supplementation of xylanase in diets with reduced energy level on the apparent metabolizable energy corrected for nitrogen, determined with laying hens at 14, 36, 60 and 80 weeks of age. Four digestibility trials were conducted, using 80...
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| Format: | Article |
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Sociedade Brasileira de Zootecnia
2012-12-01
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| Series: | Revista Brasileira de Zootecnia |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001200008 |
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| author | Karina Márcia Ribeiro de Souza Douglas Emygdio de Faria Vanessa de Souza Nakagi Ágatha Cristina de Pinho Carão Bruna Helena Carvalho Pacheco Renata Barbieri Trevisan Gilson Alexandre Gomes |
| author_facet | Karina Márcia Ribeiro de Souza Douglas Emygdio de Faria Vanessa de Souza Nakagi Ágatha Cristina de Pinho Carão Bruna Helena Carvalho Pacheco Renata Barbieri Trevisan Gilson Alexandre Gomes |
| author_sort | Karina Márcia Ribeiro de Souza |
| collection | DOAJ |
| description | The objective of this study was to evaluate the effect of the supplementation of xylanase in diets with reduced energy level on the apparent metabolizable energy corrected for nitrogen, determined with laying hens at 14, 36, 60 and 80 weeks of age. Four digestibility trials were conducted, using 80 Hy-line W36 laying hens aged 14, 36, 60 and 80 weeks of age. Birds were distributed in a completely randomized design in 2 × 2 factorial arrangement (energy level × inclusion of xylanase), totaling four treatments with 10 replicates of two birds each. Treatments were: positive control (balanced diet for their age); positive control + xylanase; negative control (diet with reduction of 100 kcal/kg in the level of metabolizable energy); and negative control + xylanase. Xylanase, produced by microorganism Trichoderma reesei, was added to the diets at 100 g/t (16,000 BXU/kg) for diets fed at 14 weeks and 75 g/t for diets of 36, 60 and 80 weeks (12,000 BXU/kg). The data obtained were subjected to analysis of variance at 5% probability. Supplementation of xylanase promoted higher values for AME (apparent metabolizable energy) and AMEn (apparent metabolizable energy corrected for nitrogen) determined with 80-week-old laying hens, subjected to diet with energy level according to the nutritional requirements for their age. Supplementation of xylanase increases the matabolizability coefficient of the dietary crude protein and improves the nitrogen retention of laying hens at 14 weeks. In addition, xylanase associated with adequate levels of dietary energy promotes higher values for AME and AMEn determined with laying hens at 80 weeks of age. |
| first_indexed | 2024-12-19T03:44:02Z |
| format | Article |
| id | doaj.art-92992168e36645e79cf3231ced88cebd |
| institution | Directory Open Access Journal |
| issn | 1516-3598 1806-9290 |
| language | English |
| last_indexed | 2024-12-19T03:44:02Z |
| publishDate | 2012-12-01 |
| publisher | Sociedade Brasileira de Zootecnia |
| record_format | Article |
| series | Revista Brasileira de Zootecnia |
| spelling | doaj.art-92992168e36645e79cf3231ced88cebd2022-12-21T20:37:11ZengSociedade Brasileira de ZootecniaRevista Brasileira de Zootecnia1516-35981806-92902012-12-0141122433244010.1590/S1516-35982012001200008Metabolizable energy values of diets supplemented with xylanase determined with laying hensKarina Márcia Ribeiro de SouzaDouglas Emygdio de FariaVanessa de Souza NakagiÁgatha Cristina de Pinho CarãoBruna Helena Carvalho PachecoRenata Barbieri TrevisanGilson Alexandre GomesThe objective of this study was to evaluate the effect of the supplementation of xylanase in diets with reduced energy level on the apparent metabolizable energy corrected for nitrogen, determined with laying hens at 14, 36, 60 and 80 weeks of age. Four digestibility trials were conducted, using 80 Hy-line W36 laying hens aged 14, 36, 60 and 80 weeks of age. Birds were distributed in a completely randomized design in 2 × 2 factorial arrangement (energy level × inclusion of xylanase), totaling four treatments with 10 replicates of two birds each. Treatments were: positive control (balanced diet for their age); positive control + xylanase; negative control (diet with reduction of 100 kcal/kg in the level of metabolizable energy); and negative control + xylanase. Xylanase, produced by microorganism Trichoderma reesei, was added to the diets at 100 g/t (16,000 BXU/kg) for diets fed at 14 weeks and 75 g/t for diets of 36, 60 and 80 weeks (12,000 BXU/kg). The data obtained were subjected to analysis of variance at 5% probability. Supplementation of xylanase promoted higher values for AME (apparent metabolizable energy) and AMEn (apparent metabolizable energy corrected for nitrogen) determined with 80-week-old laying hens, subjected to diet with energy level according to the nutritional requirements for their age. Supplementation of xylanase increases the matabolizability coefficient of the dietary crude protein and improves the nitrogen retention of laying hens at 14 weeks. In addition, xylanase associated with adequate levels of dietary energy promotes higher values for AME and AMEn determined with laying hens at 80 weeks of age.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001200008cornenergy reductionmetabolizability coefficientrearing |
| spellingShingle | Karina Márcia Ribeiro de Souza Douglas Emygdio de Faria Vanessa de Souza Nakagi Ágatha Cristina de Pinho Carão Bruna Helena Carvalho Pacheco Renata Barbieri Trevisan Gilson Alexandre Gomes Metabolizable energy values of diets supplemented with xylanase determined with laying hens Revista Brasileira de Zootecnia corn energy reduction metabolizability coefficient rearing |
| title | Metabolizable energy values of diets supplemented with xylanase determined with laying hens |
| title_full | Metabolizable energy values of diets supplemented with xylanase determined with laying hens |
| title_fullStr | Metabolizable energy values of diets supplemented with xylanase determined with laying hens |
| title_full_unstemmed | Metabolizable energy values of diets supplemented with xylanase determined with laying hens |
| title_short | Metabolizable energy values of diets supplemented with xylanase determined with laying hens |
| title_sort | metabolizable energy values of diets supplemented with xylanase determined with laying hens |
| topic | corn energy reduction metabolizability coefficient rearing |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001200008 |
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