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Comparison of performance of normal and dwarf broiler breeders according to various degrees of feed restriction 1. effect of feed allowance on growth performance of pullets



Comparison of performance of normal and dwarf broiler breeders according to various degrees of feed restriction 1. effect of feed allowance on growth performance of pullets



Korean Journal of Animal Science 33(11): 779-786



This experiment was performed to compare the growth performance of normal and dwarf broiler breeders under various degrees of feed restriction and to evaluate the breeder's recommended growth curve and corresponding feeding program for each strain. The feeding programs within each strain were designed according to the desired growth curves as ad libitum(AL), 5% above the breeder's standard curve (+5%), standard curve (STD), and 5% below the standard curve (-5%). The normal strains consumed 26 to 33% more feed than the dwarf strain under the AL feeding programs and 3 to 9% more under the STD. Under the STD feeding, the normal strains consumed 3% more feed than the feed allowance recommended by the breeder's guide, and the dwarf strain consumed 10% more feed. At 21 weeks of age the dwarf pullets weighed about 86% of the normal strains under the STD feeding programs. Viability was significantly lower for the dwarf strain than for the normal strains but was not different between feeding programs within a strain. The degree of feed restriction had a significant effect on delay of sexual maturity of pullets.

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Accession: 007141653

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