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Abstract
Harms, R.H. and Russell, G.B. 1996. A re-evaluation of the methionine requirement of the commercial layer. J. Appl. Anim. Res., 9:141–151.
Two experiments were conducted to evaluate the methionine (Met) requirement of Hy-Line W36R laying hens. Graded levels of Met were obtained by replacing soybean meal with corn in experiment 1 and supplemental Met was used in experiment 2. An increase was obtained for egg production, egg weight, egg mass and egg content as the level of Met was increased. The Met required to produce a g of egg content at near maximum production was 5.56 and 5.58 mg in experiments 1 and 2, respectively. Broken-line regression indicated the requirement in Experiments 1 and 2 to be 259.4 and 244.3 mg per hen per day, respectively. It is suggested that the requirements would be higher at a higher level of production.