Abstract
Recently, interest has been increasing in the relationship between growth of farm animals and certain metabolites and other chemical compounds in the blood. In order to better understand the effects of growth upon blood chemistry, the effects of certain environmental forces need to be studied further. The purpose of this study was to determine the gross effects of three levels of energy intake upon several blood components in young beef heifers and to compare the linear relationships of blood component levels to growth rate and body weight among the three energy treatment groups. Forty-eight yearling heifers were assigned to three groups of 16 heifers each according to sire and weight. Each group of 16 heifers was further divided into two lots of eight animals each. The trial lasted for 224 days from October 1962 to May 1963. The heifers were kept in dry lot with access to shelter and weighed every 28 days throughout the period.
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