| Registro completo |
| Provedor de dados: |
Rev. Bras. Ciênc. Avic.
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| País: |
Brazil
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| Título: |
Performance and morphometry of the intestinal mucosa of laying hens fed diets containing xylanase
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| Autores: |
Souza,KMR de
Faria,DE de
Araújo,RB
Sakamoto,MI
Santos,TT dos
Kikuchi,C de G
Nakashima,DT
Caetano,VC
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| Data: |
2014-09-01
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| Ano: |
2014
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| Palavras-chave: |
Body weight
Crypt depth
Energy reduction
Flock uniformity
Villus height
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| Resumo: |
The objective of this study was to evaluate the effect of dietary energy level reduction and xylanase inclusion on the performance and on intestinal mucosa morphometry of two- to six-week-old laying hens. In total, 400 Hy-line W36 laying hens were distributed according to a completely randomized design in 2 x 2 factorial arrangement (energy level x inclusion of xylanase), totaling four treatments with 10 replicates of 10 birds per experimental unit. The following treatments were evaluated: positive control (balanced diet); positive control + xylanase; negative control (diet with of 100 kcal ME reduction /kg); negative control + xylanase. Body weight, weight gain, feed conversion ratio, uniformity and livability were not influenced by diets with metabolizable energy reduction and xylanase inclusion; however, the addition of xylanase to the diets resulted in shallower crypts depth and greater villus:crypt ratio in the ileum. The energy reduction of the diet associated with the supplementation of xylanase did not influence performance, but increased the feed intake of 2- to 6-week-old laying hens and increased villus height in the ileum of 6-wk-old hens. Xylanase reduces crypt depth in the ileum of 6-week-old hens.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000300003
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| Editor: |
Fundação APINCO de Ciência e Tecnologia Avícolas
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| Relação: |
10.1590/1516-635x1603241-248
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| Formato: |
text/html
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| Fonte: |
Brazilian Journal of Poultry Science v.16 n.3 2014
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| Direitos: |
info:eu-repo/semantics/openAccess
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