Skeletal development and performance of broilers

Miscellaneous · Sun Jan 01 00:00:00 EST 1989

OSTI ID:6787243

El-Deeb, M A

The effect of high dietary copper supplementation has been shown to promote growth rate. The results of the experiments reported herein indicated that copper supplementation of 100 ppm with zinc at the requirement level had no effect on growth rate or bone mineralization. However, when various levels of copper and zinc were added to the diet, significant changes in bone mineralization and liver zinc and copper concentrations occurred. In further studies, the effect of dietary supplementation with vitamin D{sub 3} or its metabolite 1,25(OH){sub 2}D{sub 3} on the incidence of tibial dyschondroplasia and related bone abnormalities in broiler chicks was investigated. The results indicated that feeding 1,25(OH){sub 2}D{sub 3} at 5ug/Kg diet as the sole source of vitamin D{sub 3} steroid was sufficient to maintain a calcium homeostasis in the chicks. The effect of growth hormone (GH) injections on the metabolism of tibial epiphyseal growth plant (EGP) in broiler chicks either genetically susceptible or resistant to tibial dyschondroplasia (HTD and LTD respectively) was investigated. GH injection increased {sup 3}H-thymidine uptake, indicating a direct effect of GH on cell replication in EGP.

• Research Organization: Maryland Univ., College Park, MD (USA)
• OSTI ID: 6787243
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
59 BASIC BIOLOGICAL SCIENCES
COPPER
METABOLISM
SKELETAL DISEASES
PATHOGENESIS
VITAMIN D
BIOLOGICAL EFFECTS
ZINC
ANIMAL GROWTH
CHICKENS
DIET
HOMEOSTASIS
LIVER
MINERALIZATION
SKELETON
STH
ANIMALS
BIRDS
BODY
DIGESTIVE SYSTEM
DISEASES
ELEMENTS
FOWL
GLANDS
GROWTH
HORMONES
METALS
ORGANS
PEPTIDE HORMONES
PITUITARY HORMONES
TRANSITION ELEMENTS
VERTEBRATES
VITAMINS
560300* - Chemicals Metabolism & Toxicology
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