The influence of various calcium and phosphorus levels on tibia strength and eggshell quality of pullets during peak production

One thousand and eighty DeKalb XL pullets were randomly allocated to nine treatments and arranged in a 3 X 3 factorial to determine the effects of dietary levels of dietary calcium (2.75, 3.75, and 425%) and three levels of dietary available phosphorus (.30, 40, and 50%) on eggshell quality and tibi...

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Bibliographic Details
Published in:Poultry science 1991-04, Vol.70 (4), p.963-969
Main Authors: Frost, T.J. (Alabama Agricultural Experiment Station, Auburn University, AL), Roland, D.A. Sr
Format: Article
Language:English
Subjects:
Animals
Bone Development - drug effects
CALCIO
CALCIUM
Calcium - blood
Calcium, Dietary - administration & dosage
Calcium, Dietary - pharmacology
CALIDAD
CARENCE MINERALE
CASCARA DE HUEVO
CENDRE
CENIZA
Chickens - growth & development
Chickens - physiology
Chlorides - blood
COQUILLE D'OEUF
DEFICIENCIA DE MINERALES
Eating - drug effects
Egg Shell - drug effects
Eggs - standards
Energy Intake
Female
FORMACION OSEA
FORMATION DES OS
FOSFORO
HUESOS
HUESOS DE LOS MIEMBROS
INGESTION DE PIENSO
METABOLISME DES MINERAUX
METABOLISMO DE MINERALES
OS DES MEMBRES
Oviposition - drug effects
PERFORMANCE DE PONTE
PESO
PHOSPHORE
Phosphorus - administration & dosage
Phosphorus - blood
Phosphorus - pharmacology
PLASMA SANGUIN
PLASMA SANGUINEO
POIDS
POLLO
Potassium - blood
POULET
PRISE ALIMENTAIRE (ANIMAUX)
QUALITE
Random Allocation
RENDIMIENTO EN LA POSTURA
RESISTANCE MECANIQUE
RESISTENCIA MECANICA
Sodium - blood
Specific Gravity
Tibia - drug effects
Tibia - growth & development
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Summary:One thousand and eighty DeKalb XL pullets were randomly allocated to nine treatments and arranged in a 3 X 3 factorial to determine the effects of dietary levels of dietary calcium (2.75, 3.75, and 425%) and three levels of dietary available phosphorus (.30, 40, and 50%) on eggshell quality and tibia weight, tibia breaking strength, tibia ash, and bone mineral content of pullets during peak production. Feed consumption increased as dietary calcium or phosphorus increased. Increasing dietary calcium caused a significant linear increase in egg specific gravity, but dietary phosphorus had no significant effect on egg specific gravity. Calcium and phosphorus levels did not significantly affect egg production, body weight, plasma chloride, or phosphorus. Ionized calcium increased significantly as dietary calcium increased. Tibia breaking strength tibia weight, tibia ash, and bone mineral content increased significantly with increasing dietary calcium. Dietary phosphorus had no significant effect on these parameters. However, when 2.75% calcium was fed, reducing dietary phosphorus significantly decreased tibia weight, tibia ash, and bone mineral content
ISSN:0032-5791
1525-3171
DOI:10.3382/ps.0700963