Interactions of dietary cation-anion balance and phosphorus: effects on growth and serum inorganic phosphorus in dairy calves.
Thirty-six male and female Holstein and Jersey calves were assigned at weaning to a randomized complete block design in a 2 x 3 factorial arrangement to evaluate the influence of two dietary cation-anion balances (-14 and +39 meq(Na + K)-(Cl + S) per 100 g diet DM) and three amounts of dietary P (.22, .29, and .37%) on performance and P metabolism from 9 to 19 wk of age. Feed intake, average daily gain, and serum inorganic P were higher on the anionic diets and increased with increasing dietary P. Body weights were higher on the .37% P diets by wk 3 and on the anionic diets by wk 6. The interaction of dietary P and cation-anion balance was responsible for significant differences in calf performance; the anionic diet exhibited marked improvement over the cationic diet at the lowest P concentration. Results indicate that the availability of P for young dairy calves may be higher with anionic than cationic diets.
Beighle
D E
DE
Department of Animal Science, University of Kentucky, Lexington 40546.
Tucker
W B
WB
Hemken
R W
RW
D000818:Animals; D001835:Body Weight; D002417:Cattle / Q000097:blood* / Q000254:growth & development*; D002712:Chlorides / Q000378:metabolism*; D004032:Diet; D005260:Female; D008297:Male; D010758:Phosphorus / Q000097:blood* / Q000378:metabolism*; D011188:Potassium / Q000378:metabolism*; D012982:Sodium, Dietary / Q000378:metabolism*; D013455:Sulfur / Q000378:metabolism*
D002712:Chlorides; D012982:Sodium, Dietary; D010758:Phosphorus; D013455:Sulfur; D011188:Potassium