Data/hora: 12/06/2024 10:23:59

Provedor de dados: | 89
País: | Brazil
Título: | Performance and morphometry of the intestinal mucosa of laying hens fed diets containing xylanase
Autores: | Souza,KMR de; Faria,DE de; Araújo,RB; Sakamoto,MI; Santos,TT dos; Kikuchi,C de G; Nakashima,DT; Caetano,VC.
Data: | 2014-09-01
Ano: | 2014
Palavras-chave: | Body weight; Crypt depth; Energy reduction; Flock uniformity; Villus height.
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.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2014000300003
Editor: | Fundação APINCO de Ciência e Tecnologia Avícolas
Relação: | 10.1590/1516-635x1603241-248
Formato: | text/html
Fonte: | Brazilian Journal of Poultry Science  v.16 n.3 2014
Fonte: | info:eu-repo/semantics/openAccess