Asian-Australasian Journal of Animal Sciences

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Effects of Levels of L-Leucine Supplementation with Sub-optimal Protein in the Diet of Grower-finisher Broiler Chickens on Carcass Composition and Sensory Characteristics

  • Erwan, E. (Institute of Tropical Agriculture, Universiti Putra Malaysia) ;
  • Alimon, A.R. (Institute of Tropical Agriculture, Universiti Putra Malaysia) ;
  • Sazili, A.Q. (Faculty of Agriculture, Universiti Putra Malaysia) ;
  • Yaakub, H. (Faculty of Agriculture, Universiti Putra Malaysia) ;
  • Karim, R. (Department of Food technology, Universiti Putra Malaysia)
  • Received : 2009.05.19
  • Accepted : 2009.11.24
  • Published : 2011.05.01
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Abstract

An experiment involving 180 straight run one-day-Cobb broilers was conducted to evaluate the effect of supplementation of L-leucine with different levels of crude protein (CP) on carcass composition and sensory characteristics of broiler grower-finisher chickens. Six experimental diets comprising two levels of crude protein (CP) i.e., 20 and 20% with three levels of L-leucine i.e. 0, 0.5 and 0.67%, were offered to birds from 21-42 d of age. The birds were randomly divided into 36 experimental pens, 5 chickens in each pen, and there were 6 replicates under each diet. L-leucine supplementation did not affect the bone and lean, whereas fat was decreased (p<0.05) when L-leucine was added at 0.5%. Similarly, there were no significant differences (p>0.05) in the lean, fat and bone among chickens fed two levels of CP. No significant differences between dietary treatments were observed on any sensory characteristics affected by dietary L-leucine and CP. From this study, it is obvious that supplementation of up to 0.5% L-leucine reduced fat. However, other characteristics were not affected by supplementation of L-leucine. Similarly, reduction of body composition and sensory characteristics were not apparent on a diet low in CP.

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