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Original Articles

Effects of age on the tryptophan requirement of laying hens

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Pages 559-565 | Published online: 08 Nov 2007

References

  • Bray , D. J. 1968 . Photoperiodism and age as factors affecting the protein requirements of laying pullets. . Poultry Science , 47 : 1005 – 1013 .
  • Fisher , C , Morris , T. R. and Jennings , R. C. 1973 . A model for the description and prediction of the response of laying hens to amino acid intake. . British Poultry Science , 14 : 469 – 484 .
  • Jennings , R. C , Fisher , G. and Morris , T. R. 1972 . Changes in the protein requirements of pullets during the first laying year. . British Poultry Science , 13 : 279 – 281 .
  • Morris , T. R. and Wethli , E. 1978 . The tryptophan requirements of young laying pullets. . British Poultry Science , 19 : 455 – 466 .
  • Pilbrow , P. J. and Morris , T. R. 1974 . Comparison of lysine requirements amongst eight stocks of laying fowls. . British Poultry Science , 15 : 51 – 73 .

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