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Protein and energy relations in the broiler chicken

Published online by Cambridge University Press:  09 March 2007

R. W. Rosebrough ,
A. D. Mitchell ,
M. F. Von Vleck  and
N. C. Steele
R. W. Rosebrough
Affiliation:
Non-ruminant Animal Nutrition Laboratory, Livestock and Poultry Sciences Institute, United States Department of Agriculture-Agricultural Research Service, Beltsville Agricultural Research Center, Beltsville, MD 20705, USA
A. D. Mitchell
Affiliation:
Non-ruminant Animal Nutrition Laboratory, Livestock and Poultry Sciences Institute, United States Department of Agriculture-Agricultural Research Service, Beltsville Agricultural Research Center, Beltsville, MD 20705, USA
M. F. Von Vleck
Affiliation:
Non-ruminant Animal Nutrition Laboratory, Livestock and Poultry Sciences Institute, United States Department of Agriculture-Agricultural Research Service, Beltsville Agricultural Research Center, Beltsville, MD 20705, USA
N. C. Steele
Affiliation:
Non-ruminant Animal Nutrition Laboratory, Livestock and Poultry Sciences Institute, United States Department of Agriculture-Agricultural Research Service, Beltsville Agricultural Research Center, Beltsville, MD 20705, USA
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Abstract

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Chickens were fed on diets containing either 12.8 MJ, 150 g crude protein (nitrogen x 6.25)/kg or 12.8 MJ, 200 g crude protein/kg to determine differences in metabolism. The diet containing 12.8 MJ, 150 g crude protein/kg contained either 8 or 12 g lysine/kg. Treatment variables examined in vitro were lipogenesis, glucose production and hepatic enzyme activities to compare metabolism in chicks fed on a low-protein, lysine-supplemented diet and a diet formulated to contain the required amount of lysine from intact protein. Growth was similar in chicks fed on diets containing either 12.8 MJ, 154 g crude protein with 12 g lysine/kg or 12.8 MJ, 200 g crude protein/kg. Net glucose production was greater (p < 0.05) in liver explants from chickens fed on diets containing either 12.8 MJ, 154 g crude protein with 12 g lysine/kg or 12.8 MJ, 200 g crude protein/kg than in explants from chickens fed on 12.8 MJ, 150 g crude protein with 8 g lysine/kg. Pyruvate use for glucose production was greater (p < 0.05) in chickens fed on a diet containing 12.8 MJ, 150 g crude protein with 8 g lysine/kg. The findings from the present study suggest that crystalline and ‘natural’ lysine additions to chick diets may influence metabolism differently.

Keywords

LysineProteinLipogenesisChicken
Type
Diet and Lipid Metabolism
Information
British Journal of Nutrition , Volume 64 , Issue 2 , September 1990 , pp. 515 - 523
Copyright
Copyright © The Nutrition Society 1990

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