• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1
  • Tagged with
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Antioxidantes na dieta de frangos de corte / Antioxidants in the diet of broiler chickens.

Boschini, Carolina 24 February 2011 (has links)
Made available in DSpace on 2014-08-20T14:38:50Z (GMT). No. of bitstreams: 1 Dissertacao_Carolina_Boschini.pdf: 903597 bytes, checksum: 9c67bbb615d36cec975435c06e8ceb28 (MD5) Previous issue date: 2011-02-24 / This study aimed to investigate the effects of a product containing a combination of antioxidants (CA) and different levels of vitamin E on performance, carcass traits and meat quality of broilers. A total of 840 Cobb male broilers were fed experimental diets from 1 to 35 days. A completely randomized experimental design was used. Dietary treatments consisted of T1- 200ppm CA, T2- 200ppm CA + Vitamin E (20 ppm), T3- 200ppm CA + Vitamin E (40ppm), T4- 200ppm CA + vitamin E (60ppm), T5- 200ppm CA + vitamin E (80ppm), T6- vitamin E (80ppm). A basal corn-soybean meal diet was formulated according to requirements established by Cobb. Performance was not affected by dietary treatments. Carcass yield and cut-ups were not signifi-cantly influenced, but a numerical improvement of breast and thigh was observed in birds fed T3. Meat colorimetry was significantly affected, finding the best results to L* (T5), a* (T1 and T5) and b* (T6), but results did not differ from T2, T3, T4 and T5. A lowest TBARs index was observed in birds fed T5, indicating lower meat lipidic pe-roxidation. These results indicate that the CA with any level of vitamin E did not change the broiler performance and efficiency factor. The CA improved carcass yield and cut-ups, color and decreases meat lipid peroxidation. / Este estudo teve como objetivo investigar os efeitos de um produto com uma combinação de antioxidantes (CA) e diferentes níveis de vitamina E no desempenho, características de carcaça e qualidade da carne de frangos de corte. Um total de 840 frangos de corte Cobb machos foram alimentados com dietas experimentais de 1 a 35 dias. O delineamento experimental utilizado foi o completamente casualizado. As dietas experimentais consistiram de T1- CA-200ppm, T2-200ppm CA + Vitamina E (20 ppm), T3-200ppm CA + Vitamina E (40ppm), T4-200ppm CA + vitamina E (60ppm), T5-200ppm CA vitamina E + (80ppm) E e T6-vitamina E (80ppm). A dieta base de milho e soja foi formulada de acordo com os requisitos estabelecidos pela Cobb. O desempenho não foi afetado pelos tratamentos. O rendimento de carcaça e corte não foram significativamente influenciados, mas uma melhora numérica do peito e coxa foi observada nas aves alimentadas com T3. Colorimetria da carne foi afetada significativamente, encontrando melhores resultados de L * para o T5, a * (T1 e T5) e b * (T6) não diferindo de T2, T3, T4 e T5. Um menor índice de TBARS foi observado nas aves alimentadas T5, indicando menor peroxidação lipídica na carne. Estes resultados indicam que a CA com qualquer nível de vitamina E não alterou o desempenho de frangos de corte. A CA melhorou o rendimento de carcaça e corte, cor e diminuiu a peroxidação lipídica da carne.

Page generated in 0.1012 seconds