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Performance of Commercial Laying Hens When Fed Diets with Various Sources of Energy

Department of Animal Sciences, University of Florida, Gainesville, Florida 32611

Correspondence: R. H. Harms, E-mail: harms{at}animal.ufl.edu

Two experiments were conducted to determine the influence of adding various fat sources to the diet of the aged (76 to 84 wk) commercial laying hen. In experiment 1, corn-soybean meal diets were fed with 0, 2 and 4% corn oil. A diet containing 13.85% wheat bran was fed with and without 4% corn oil. A sixth diet contained 2% corn oil and 26.21% sugar. No difference in egg production among the 6 treatments was observed. The addition of 4% corn oil produced a nonsignificant increase in egg weight. The corn-soybean meal diet containing no corn oil also was used as the control in experiment 2. Seven treatment diets were fed with 4% fat from various sources. No difference in egg production among the 8 treatments was observed. Egg weight was higher when the diet contained added fat except when tallow was added.

Key Words: laying hen • egg weight • energy intake • fat

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