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Influence of High Phosphorus Levels in Caged Layer Diets

1965; Elsevier BV; Volume: 44; Issue: 5 Linguagem: Inglês

10.3382/ps.0441249

1525-3171

R.H. Harms, B.L. Damron, P.W. Waldroup,

Insect-Plant Interactions and Control

TOTAL phosphorus levels of 0.60 and 0.70 percent have been reported to depress egg production when hens were maintained on litter (Singsen et al., 1962). However, these workers found that increasing the phosphorus level from 0.5 to 0.6 percent improved performance of laying hens maintained on wire. Levels in excess of 0.6 percent were not fed to birds on wire, therefore, it was not possible to determine a tolerance level for these birds. Crowley et al. (1963) reported that increasing the phosphorus level of the diet from 0.569 to 0.675 percent resulted in an improvement in performance of caged layers. These workers did not feed higher levels, therefore, they could not determine a tolerance level. Harms et al. (1961) reported an improvement in performance of hens maintained in cages by increasing the phosphorus level from 0.54 to 0.59 percent. However, a similar increase of phosphorus in the diet of hens…