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Performance of Commercial Layers when Fed Diets with Corn Oil Added from 24 To 36 Weeks of Age

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

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

Six percent corn oil was added to the diet of a different group of commercial laying hens at biweekly intervals from 24 to 34 wk of age. A 2 x 7 factorial arrangement of treatments was used, which involved two houses with cold and warm temperatures and seven dietary treatments. The data were collected from each treatment for the entire experiment. The interaction of house x treatment was not significant; therefore, the data for the two houses were combined, and main effects are presented. The number of eggs weighing greater than 54.3 g increased significantly each time the corn oil was added to the diet. Egg weight was increased after corn oil had been added to the diet for 2 wk. Adding corn oil to the diet increased daily energy intake and body weight but did not affect egg production. The highest percentage of large and above eggs for the entire experiment was produced when corn oil was added at 26 wk of age.

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