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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 65Zn, 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 65Zn analyses. Growth, feed intake and feed efficiency improved with increasing dietary P levels. Level of dietary P and Ca had little or no effect (P greater than .05) on total Zn content of rib, tibia, liver, heart, kidney, muscle or blood. Likewise, 65Zn absorption and content in most tissues were not affected (P greater than .05). 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.
D P Laflamme, and
W J Miller, and
M W Neathery, and
R P Gentry, and
D M Blackmon, and
K R Logner, and
A S Fielding
December 1990,
Journal of animal science,
D P Laflamme, and
W J Miller, and
M W Neathery, and
R P Gentry, and
D M Blackmon, and
K R Logner, and
A S Fielding
September 1976,
Journal of dairy science,
D P Laflamme, and
W J Miller, and
M W Neathery, and
R P Gentry, and
D M Blackmon, and
K R Logner, and
A S Fielding
April 2004,
Journal of dairy science,
D P Laflamme, and
W J Miller, and
M W Neathery, and
R P Gentry, and
D M Blackmon, and
K R Logner, and
A S Fielding
May 1985,
Journal of dairy science,
D P Laflamme, and
W J Miller, and
M W Neathery, and
R P Gentry, and
D M Blackmon, and
K R Logner, and
A S Fielding
January 1977,
Journal of animal science,
D P Laflamme, and
W J Miller, and
M W Neathery, and
R P Gentry, and
D M Blackmon, and
K R Logner, and
A S Fielding
April 1990,
Journal of animal science,
D P Laflamme, and
W J Miller, and
M W Neathery, and
R P Gentry, and
D M Blackmon, and
K R Logner, and
A S Fielding
February 1978,
Journal of animal science,
D P Laflamme, and
W J Miller, and
M W Neathery, and
R P Gentry, and
D M Blackmon, and
K R Logner, and
A S Fielding
May 1980,
Journal of dairy science,
D P Laflamme, and
W J Miller, and
M W Neathery, and
R P Gentry, and
D M Blackmon, and
K R Logner, and
A S Fielding
April 1981,
The Journal of nutrition,
D P Laflamme, and
W J Miller, and
M W Neathery, and
R P Gentry, and
D M Blackmon, and
K R Logner, and
A S Fielding
September 1985,
Biological trace element research,
