Effects of Amino Acid-Enriched Ruminally Protected Fatty Acids on Plasma Metabolites, Growth Performance and Carcass Characteristics of Hanwoo Steers (Report‪)‬

INTRODUCTION Energy- and protein-rich feed resources have been used for beef cattle because productivity can be improved substantially by strategic supplementation with energy and amino acid. Ca salts of fatty acids have been reported to be insoluble at a pH range of 6-7 and have a net energy value of approximately three times that of corn (Andrew et al., 1990). When Ca salts of fatty acids from vegetable oils were included in beef cattle diets for additional energy supply, there were relatively few effects on rumen fermentation (Schauff and Clark, 1989). Ca salts of fatty acids are completely dissociated in the acidic conditions of the abomasum (Jenkins and Palmquist, 1984) and absorbed in the small intestine (Kowalski et al., 1997; Ramana Reddy et al., 2003). Fearon et al. (1994) also reported that duodenal input of fatty acid was increased by supplementing Ca salts of fatty acids.