Effect of low to normal dietary phosphorus levels on zinc metabolism and tissue distribution in calves
Sixteen 10-wk-old, phosphorus (P)-depleted Holstein bull calves were fed for 6 wk a control diet containing .08% P or P-supplemented diets containing .14, .20 or .32% P with supplemental P from two sources (CDP and Dynafos). The diets contained .45, .56, .66 and .87% Ca. After 5 wk of the experiment, the calves were dosed orally with WVZn, and daily total fecal collections were initiated. At the end of the experimental period, the calves were killed and tissue samples were taken for total Zn and WVZn analyses. Growth, feed intake and feed efficiency improved with increasing dietary P levels. Level of dietary P and Ca had little or no effect on total Zn content of rib, tibia, liver, heart, kidney, muscle or blood. Likewise, WVZn absorption and content in most tissues were not affected. The results do not preclude the possibility of some minor effects of P levels on Zn metabolism. However, it is apparent that when adequate Zn is fed, any effects are likely to be of little or no practical importance.
- Research Organization:
- Univ. of Georgia, Athens
- OSTI ID:
- 6297932
- Journal Information:
- J. Anim. Sci.; (United States), Journal Name: J. Anim. Sci.; (United States) Vol. 2; ISSN JANSA
- Country of Publication:
- United States
- Language:
- English
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59 BASIC BIOLOGICAL SCIENCES
ANIMALS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BIOCHEMISTRY
BIOLOGICAL MATERIALS
BIOLOGICAL WASTES
BLOOD
BODY
BODY FLUIDS
CALVES
CARDIOVASCULAR SYSTEM
CATTLE
CHEMISTRY
DAYS LIVING RADIOISOTOPES
DIGESTIVE SYSTEM
DISTRIBUTION
DOMESTIC ANIMALS
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTS
EVEN-ODD NUCLEI
FECES
GLANDS
HEART
INTERMEDIATE MASS NUCLEI
ISOTOPES
KIDNEYS
LIVER
MAMMALS
MATERIALS
METABOLISM
MUSCLES
NONMETALS
NUCLEI
ORGANS
PHOSPHORUS
RADIOISOTOPES
RUMINANTS
SKELETON
TISSUE DISTRIBUTION
VERTEBRATES
WASTES
ZINC 65
ZINC COMPOUNDS
ZINC ISOTOPES