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Twenty ruminally fistulated steers were used in starch and various sugars, when fed with different two experiments to evaluate the effects of suppleamounts of DIP, on intake and digestion of lowmental carbohydrate source (starch, glucose, quality tallgrass-prairie hay. fructose, or sucrose) fed at .3% BW/day on the utilization of low-quality tallgrass-prairie hay. In Experiment 1, all supplemental carbohydrates were fed with a low level of supplemental degradable Twenty Hereford × Angus steers with ruminal intake protein. In Experiment 2, the level of fistulas were housed in individual tie stalls and used supplemental degradable intake protein was high. in two experiments. In both experiments, steers Intake of the tallgrass-prairie hay was not affected had free-choice access to low-quality tallgrasssignificantly by supplementation in either experiprairie hay (5.2% CP and 72.7% NDF in Exp. 1 ment, but as a result of the added carbohydrate, and 5.2% CP and 76.0% NDF in Exp. 2). Steers total intake was increased. When supplemental were randomly assigned to treatments at the beginprotein intake was inadequate, supplemental ning of each experiment. Treatments were either carbohydrates depressed digestion, but when no-supplement negative control (NC) or supplesupplemental protein was higher, fiber digestion mental starch, glucose (supplied as dextrose), was not depressed. Because of increased total fructose, or sucrose fed at .30% BW/daily. Suintake (forage plus supplement) and increased crose is a disaccharide composed of two digestion in Experiment 2, total digestible organic monosaccharides, glucose and fructose. We were matter intake was greater in the supplemented interested in sugars because of their presence in animals, with little difference among carbohydrate molasses-based liquid supplements and blocks. sources. Supplemented steers also received degradable |
