Efeito da suplementação da vitamina A, sôbre o desenvolvimento e produção de leite de novilhas
Keywords:
fator importante, produção leiteira, ganho peso, vitamina a, nível significanteAbstract
The experiment was conducted during 444 days at the Universidade Federal de Viçosa with 20 Holstein-Zebu crossbred heifers. The heifers averaged 14 months of age and 256 kilos in weight at the beginning of the experiment.
References
CUNHA, T.J. The value of vitamin A for beef cattle Florida, Dep. of An. Sci., 1967. 4p. (Mimeografado).
HUBBERT, F., HALE, W. H., STARNLEY, E. B. & TAYLOR, B. The influence of vitamin A on carcass characteristics. Arizona. University of Arizona. 1963. 3 p. (Cattle Feeders' Day. Mimeo).
JORDAN, H.A., SMITH, G.S., NEUMANN, A. L. , SIMNERMAN, J. E. & BRENIMAN, G. W. Vitamin A nutrition of beef cattle fed corn Silages. J. An. Sci., New York. 22(3): 738-745. 1963.
PERRY, W.T., BEESON, M. W., SMITH, H.W. & MOHLER, T.M. Injectable v.s. oral vitamin A for fattening steer calves. J. An. Sci., New York. 26(1): 115-118. 1967.
PERRY, T.M., SMITH, W.H., BEESON, W.M, & MOHLER, Value of supplemental vitamin A for fatening beef cattle on pasture. J. An. Sci., New York. 25(3): 814-820. 1966.
PERRY, T.W., BEESON, W.M., MOHLER, M. T. & SMITH, W.H. Levels of supplemental vitamin A with and without sunocured alfafa meal for fattening steers calves. J. An. Sci., New York. 21(2): 333-339. 1962.
RALSTON, A.T., CHURCH, O.C., KEMICK, W.H, & RAYLOR, N.O. Effect of varying milo-barley levels, ration preparation and nitraruminal injections of vitamin A upon feedlot performance of steers. J. An. Sci., New York. 22(4): 943-945. 1963.
REDDY, J.S. & GANAPATHY, M. S. Deficiência de vitamina A em Bezerros, Sel, Zoot. S. Paulo, 7(76):24-26. 1968.
SWANSON, E, W,, MARTIN, G.G., PARDUE, F.F, & GORMAN, G.M. Milk production of cows fed diets deficient in vitamin A. J. An. Sci., New York. 27(2): 541-548. 1968.
