• JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
 
  Bookmark and Share
 
 
Master's Dissertation
DOI
10.11606/D.74.2009.tde-26052009-103850
Document
Author
Full name
Ricardo Luis do Carmo Barbalho
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
Pirassununga, 2009
Supervisor
Committee
Araújo, Lúcio Francelino de (President)
Albuquerque, Ricardo de
Junqueira, Otto Mack
Title in Portuguese
Suplementação de levedura hidrolisada (Hilyses®) nas dietas de frangos de corte
Keywords in Portuguese
Frango de corte
Levedura
Nucleotídeos
Abstract in Portuguese
O objetivo deste trabalho foi avaliar a utilização da levedura hidrolisada como fonte de nucleotídeos para frangos de corte. As aves foram suplementadas com diferentes níveis de inclusão nas dietas iniciais de 1 a 14 dias de idade. Foram utilizados um total de 576 pintos da linhagem Ross 708, os quais foram distribuídos em 6 tratamentos com 8 repetições (12 aves por box). Os tratamentos consistiram da inclusão de 0, 2, 4, 6, 8 e 10 kg de levedura hidrolisada/tonelada de ração. A levedura hidrolisada foi adicionada na dieta no lugar do material inerte da ração. A dieta inicial foi fornecida na forma triturada enquanto as dietas de crescimento, final e de retirada foram fornecidas na forma de pellets. Durante todo o experimento o acesso à água e ração foi ad libitum. Todas as dietas foram feitas à base de milho, farelo de soja e gordura de frango e foram formuladas para atender as exigências nutricionais recomendadas pelo manual de recomendações nutricionais Ross 708. Aos 42 dias, as aves alimentadas com 1% de levedura hidrolisada tiveram maior peso corporal e ganho de peso quando comparadas aos demais tratamentos (P<0,05). Não houveram diferenças estatísticas entre os tratamentos para as variáveis mortalidade e densidade de vilos. Contudo aves que não foram suplementadas com levedura hidrolisada (tratamento controle) apresentaram menor profundidade de cripta e a suplementação de 1% de levedura resultou em maior altura de vilos. Aves as quais receberam dietas com 0,2% de inclusão de levedura hidrolisada apresentaram menor rendimento de peito que as aves que receberam os demais níveis de levedura, mas foram iguais as aves do tratamento controle. Contudo, o rendimento de carcaça, sassami e gordura abdominal não foram influenciados pelos tratamentos experimentais. Estes resultados demostraram a eficácia da utilização de levedura hidrolisada na dieta de frangos de corte no período de 1 a 14 dias sobre as características de produção.
Title in English
Supplementation of hydrolyzed yeast (Hilyses®) on broiler chicks diets
Keywords in English
Broiler chicks
Nucleotides
Saccharomyces cerevisiae
Yeast
Abstract in English
The objective of this work was to evaluate hydrolyzed yeast utilization as nucleotides source to broilers. Birds were supplemented with different inclusion levels on starter diets from 1 to 14 days of age. A total of five hundred seventy six Ross 708 chicks were allotted to 6 experimental treatments with 8 replications (12 broilers per pen). Birds were randomly distributed in following treatments: 0, 2, 4, 6, 8 and 10 kg hydrolyzed yeast/ton of feed. Hydrolyzed yeast was added to the test diet in place of filler. Starter diets were supplied in crumbled form while grower, finisher, and withdrawal were supplied in pellet form. Throughout experiment water and feed were supplied ad libitum. All diets were based on corn, soybean meal and poultry fat, and were formulated to achieve nutritional requirements from recommendations guide for Ross x Ross 708 broilers. At 42 d chicks fed 1% hydrolyzed yeast demonstrated higher body weight and body weight gain over birds fed other treatments (P<0.05). Mortality and villous density did not differ among treatments. However birds fed control treatment showed lower crypt depth and 1% hydrolyzed yeast supplementation promoted higher villous high. Birds fed 0.2% hydrolyzed yeast showed lower breast meat yield than birds received other yeast levels, but were equals to control treatment control. However, carcass and tender yield, and abdominal fat were not influenced by treatments. These results indicated efficacy of hydrolyzed yeast utilization on broiler diets from 1 to 14 on production characteristics.
 
WARNING - Viewing this document is conditioned on your acceptance of the following terms of use:
This document is only for private use for research and teaching activities. Reproduction for commercial use is forbidden. This rights cover the whole data about this document as well as its contents. Any uses or copies of this document in whole or in part must include the author's name.
ME1909818.pdf (270.04 Kbytes)
Publishing Date
2009-05-26
 
WARNING: Learn what derived works are clicking here.
All rights of the thesis/dissertation are from the authors
Centro de Informática de São Carlos
Digital Library of Theses and Dissertations of USP. Copyright © 2001-2021. All rights reserved.