Abstract
ALTHOUGH extensive research has been conducted on the nutritional requirements of young turkeys, only limited work has been undertaken to determine qualitative and quantitative nutritive requirements of turkey hens for maximum reproduction. Consequently, a series of studies on this subject was initiated at this laboratory in 1949. Results of the studies conducted that year and each succeeding year until 1955 are the subjects of this report.Since turkey hatchability under practical conditions is notoriously low, these studies were undertaken to determine whether or not supplementing a practical turkey ration with animal protein, dried skimmilk, vitamin B12, antibiotics, niacin, vitamin E or fresh forage juice would improve hatchability. One of the experiments showing the importance of vitamin E supplementation of practical turkey breeding rations was reported in part by Jensen et al. (1953). Since then, this portion of the work has been confirmed and extended by Atkinson et al. (1954, 1955) …
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