Bioavailability of phosphorus from defluorinated and dicalcium phosphates and phosphorus requirement of calves.
Bioavailability of P from defluorinated phosphate and dicalcium phosphate and the P requirement were studied with 63 male Holstein calves. A P depletion diet containing .08% total P on a dry matter basis was fed to all animals for 4 wk beginning at 6 wk of age and 61 kg weight. Calves developed typical signs of P deficiency. The depletion period was followed by a 6-wk experimental period in which the same depletion diet was used as a control. Phosphorus from each of the two sources was added to make diets containing .14, .20, and .32% total P. Source of supplemental P did not affect weight gains, feed consumption, feed efficiency, serum inorganic P, serum alkaline phosphatase, or bone ash.
Miller
W J
WJ
Department of Animal and Dairy Science, University of Georgia Athens 30602.
Neathery
M W
MW
Gentry
R P
RP
Blackmon
D M
DM
Crowe
C T
CT
Ware
G O
GO
Fielding
A S
AS
D000818:Animals; D001682:Biological Availability; D002131:Calcium Pyrophosphate / Q000378:metabolism; D002417:Cattle / Q000378:metabolism*; D008297:Male; D009751:Nutritional Requirements; D010710:Phosphates / Q000378:metabolism*; D010758:Phosphorus / Q000378:metabolism / Q000493:pharmacokinetics*
D010710:Phosphates; D010758:Phosphorus; D002131:Calcium Pyrophosphate