Abstract
ABSTRACT IN MEAT production phases of the poultry industry, it is usually considered essential to adhere to feeding programs which call for a rapid rate of early growth. Feeding formulas are frequently based upon the liberal use of corn and soybean oil meal, and nutritionists are faced with the problem of adequate economical supplementation to produce maximum gains. Scott and Jensen (1952) reported that the turkey requires two unidentified growth factors, the first present in fish meal and meat scraps and the second in casein, brewers yeast, skimmilk, and grass juice. Antibiotic supplementation “spared” the requirement for the second factor. Atkinson et al. (1955) indicated that whey products, brewers yeast and fish solubles contained unidentified factors for turkey growth later in the hatching season, suggesting that a depletion of unknown factors may be required prior to the occurrence of definite responses. Kohler and Graham (1952) observed that maternal reserves regulated the . . .
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