RELATIONSHIP BETWEEN PHOSPHORUS LEVEL AND FEED ALLOWANCE OF DWARF BREEDERS \VI'l'H EGG QUALITY AND BONE DEVELOPMENT OF DAY OLD CHICK

Abstract

An experiment was conducted to study the relationship between dietary levels of
phosphorus level and feed allowance of dwarf breeder hens on the egg quality and the bone development of day old chick. One hundred and forty-four broiler breeders were kept in battery cages. Birds were fed (2.750 kcal/kg ME and 16.5% CP) either 105 and 115 g/day containing of 0.2; 0.6 and 1.0 % available phosphorus The result indicated that egg weight was decreased by limiting the feed intake of the breeders. Shell quality decreased in proportion to the dietary phosphorus levels and was not affected by feed allowance. Albumen quality was slightly impaired in severely restricted hens. Serum inorganic phosphorus in hens and yolk phosphorus increased with dietary phosphorus levels, but it was not found in serum inorganic phosphorus in day old chicks. Tibia ash percent of the progeny at hatching was markedly improved in proportion to maternal phosphorus and feed intake, lt was concluded that maternal feed intake and phosphorus supplies are of importance for the egg quality and initial bone development of the progeny.