By Chung, J. S. and Chung, JaeSuck and Jang, J. S. and Jang, JongSik and Kim, K. S. and Kim, KiSeok and Kwon, O. D. and Kwon, OhDeog and Lee, H. B. and Lee, HyunBeom and Lee, Y. J. and Lee, YoungJu and Sung, E. J. and Sung, EnJu and Tak, R. B. and Tak, RyunBin, Korean Journal of Veterinary Clinical Medicine, 1998
Description
Nineteen Korean calves, 4-6 months of age, were fed on artificial hay containing 10% concentrates or lucerne and ryegrass hay for 2 months and assigned to 5 groups. Group 1 was inoculated for 2 days via a stomach tube with rumen fluid (1500 ml daily) from Korean beef cattle previously adapted to a high-energy diet. Group 2 was inoculated by trocarization for 2 days with the same rumen fluid. Group 3 was inoculated by trocarization with bacterial culture (1500 ml daily) containing 2 X 109/ml of Gram-negative bacteria derived from adapted rumen fluid. The remaining 2 control groups were treated with normal saline solution by the same methods. All cattle were fed on high-energy diets containing 80% grain ad libitum for 30-74 days. All experimental groups inoculated with rumen fluid and bacterial culture from adapted cattle did not show any signs of rumen acidosis or other related diseases; most of the control calves showed diarrhoea and bloat and a calf laminitis. Average daily weight gain and feed conversion efficiency of experimental calves improved slightly compared with control calves. Following the feeding of high-grain diet, rumen fluid pH decreased in experimental and control calves. Severe acidosis with pH<5.0 was observed only in control group 2. Protozoan count in rumen fluid decreased during high-grain feeding in experimental and control calves, the decrease being greatest in control calves. No significant differences in haematological and blood chemical values between the experimental and control calves were observed. However, in one control calf which showed laminitis a marked increase in serum glutamic oxaloacetate transaminase and lactic dehydrogenase activities and a decrease in serum glucose were observed. It is concluded that intraruminal transplantation of unadapted calves with rumen fluid from cattle adapted to a high-energy diet prevents diseases associated with high-grain feeding and improves performance
Nineteen Korean calves, 4-6 months of age, were fed on artificial hay containing 10% concentrates or lucerne and ryegrass hay for 2 months and assigned to 5 groups. Group 1 was inoculated for 2 days via a stomach tube with rumen fluid (1500 ml daily) from Korean beef cattle previously adapted to a high-energy diet. Group 2 was inoculated by trocarization for 2 days with the same rumen fluid. Group 3 was inoculated by trocarization with bacterial culture (1500 ml daily) containing 2 X 109/ml of Gram-negative bacteria derived from adapted rumen fluid. The remaining 2 control groups were treated with normal saline solution by the same methods. All cattle were fed on high-energy diets containing 80% grain ad libitum for 30-74 days. All experimental groups inoculated with rumen fluid and bacterial culture from adapted cattle did not show any signs of rumen acidosis or other related diseases; most of the control calves showed diarrhoea and bloat and a calf laminitis. Average daily weight gain and feed conversion efficiency of experimental calves improved slightly compared with control calves. Following the feeding of high-grain diet, rumen fluid pH decreased in experimental and control calves. Severe acidosis with pH<5.0 was observed only in control group 2. Protozoan count in rumen fluid decreased during high-grain feeding in experimental and control calves, the decrease being greatest in control calves. No significant differences in haematological and blood chemical values between the experimental and control calves were observed. However, in one control calf which showed laminitis a marked increase in serum glutamic oxaloacetate transaminase and lactic dehydrogenase activities and a decrease in serum glucose were observed. It is concluded that intraruminal transplantation of unadapted calves with rumen fluid from cattle adapted to a high-energy diet prevents diseases associated with high-grain feeding and improves performance
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