Daily Protein Intake Requirement of Laying Hens


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Protein and Energy Requirements of Laying Hens and Broiler Breeders

Layer and Breeder rations are still evaluated, as a rule, on the basis of their protein content, expressed as "percent protein". This is the easiest and most practical criterion, but unfortunately it is a relative measure, depending on general feed consumption. The latter hardly relates to the productive traits of the hen, being dependent primarily on the energy content of the feed and on the e...

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Effect of housing system on the calcium requirement of laying hens and on eggshell quality

The effects of housing systems on the calcium requirement for eggshell production, eggshell quality and on the breaking strength of the hen’s tibia were evaluated. Unenriched cages (UN) (24 laying hens), enriched cages (EN) (16 laying hens) and floor system (FS) (24 laying hens) were used in this experiment. The eggshell production of laying hens from 19 to 66 weeks of age was higher (P < 0.01)...

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Requirement of tryptophan in relation to the supply of large neutral amino acids in laying hens.

The present study was undertaken to find out whether the tryptophan requirement of laying hens is influenced by the supply of large neutral amino acids (LNAA). A factorial experiment was performed in which the dietary tryptophan concentration was varied at six different levels (1.0, 1.25, 1.5, 1.75, 2.0, and 2.5 g tryptophan/kg diet). As the second factor, the dietary concentrations of LNAA (is...

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عنوان ژورنال: Poultry Science

سال: 1974

ISSN: 0032-5791

DOI: 10.3382/ps.0530354