Abstract
Abstract LAYING rations of high energy content were reported to support higher rates of egg production as early as 1945 by Heuser et al., and an inverse relationship between dietary fiber level and egg production efficiency was observed by Bird and Whitson (1946). Lillie et al. (1952) noted that the feeding of a laying diet supplemented with lard produced a marked improvement in feed conversion of layers. McDaniel et al. (1957) reported a 12.2% improvement in feed conversion through an increase in productive energy level from 962–1,050 Calories per pound in a 17% protein diet. During the cold weather months only, Hill, Anderson and Dansky (1956) noted an improvement in the rate of egg production at the higher energy levels studied. No difference in rate of production was obtained during the other portions of the year. Feed requirement per dozen eggs was lowered 12% by a 100 Calorie increase in…
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