Portal de Periódicos da CAPES

Effect on Growth of Supplements to Chick Rations Containing Vitamin B12 and Antibiotics

1952; Elsevier BV; Volume: 31; Issue: 4 Linguagem: Inglês

10.3382/ps.0310571

1525-3171

Margaret Sunde, J.R. Vedvik, H. W. Bruins, W.W. Cravens,

Animal Nutrition and Physiology

THE increased use of vitamin B12 and/or antibiotic feed supplements in practical chick feeding has created much interest in the advisability of removing all of the animal protein feedstuffs from the starting ration. Evidence that chicks fed an all vegetable ration supplemented with vitamin B12 will grow normally has been presented by Ott el al. (1948), Lillie el al. (1948) and Nichol el al. (1949). Shortly thereafter Stokstad and co-workers (1949) observed that certain fermentation products were more effective in promoting growth of young chicks than would be expected from their B12 content. Later Stokstad and Jukes (1950) observed that the addition of crystalline aureomycin hydrochloride to the chick ration also gave a growth response above that obtained by B12 alone. Still later Menge, Combs and Shorb (1949) reported a factor being present in dried liver and whey which increased the rate of growth of chicks when added to a . . .