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Effect of Direct Fed Microbial and Enzyme Supplements on Growth and Biogenic Substances of Growing Steers  

Yang, Seung Hak (National Institute of Animal Scinece, R.D.A.)
Kim, Hyeon Shup (National Institute of Animal Scinece, R.D.A.)
Cho, Won Mo (National Institute of Animal Scinece, R.D.A.)
Kim, Sang Bum (National Institute of Animal Scinece, R.D.A.)
Cho, Sung Back (National Institute of Animal Scinece, R.D.A.)
Park, Kyu Hyun (National Institute of Animal Scinece, R.D.A.)
Choi, Dong Yoon (National Institute of Animal Scinece, R.D.A.)
Hwang, Sung Gu (Hankyong National University)
Yoo, Yong Hee (National Institute of Animal Scinece, R.D.A.)
Publication Information
Journal of Animal Environmental Science / v.18, no.sup, 2012 , pp. 47-54 More about this Journal
Abstract
Effect of commercial Direct Fed Microbials (DFM) or protease treated feed (PTF) supplementation on growth rate and biogenic substances such as BUN, glucose, IgG, GOT, GPT and Vitamin A, C, E from Holstein steers was studied for 7 months. Thirty two steers aged 2~3 months were separated with 4 groups for control, DFM (PS), protease (ES) and their mix (PS + ES) supplementally fed 0, 100, 100 and 50 + 50 g/day respectively. Weight gain was averagely higher in PS than any others, although there were no differences significantly. All treatments enhanced to 3~8% of control in dry matter, crude protein and total digestible nutrient (P>0.05). Metabolic diseases with veterinary cure had not shown in this study. Plasma GOT and GPT were lower in the PS and ES than control. Plasma glucose concentration was also lower in PS than the others. Total cholesterol of ES was higher than the others but that of PS is the lowest. Plasma vitamin C was higher in PS than the others. It was shown that dietary PS affected change from glucose to vitamin C with not overloading liver. Conclusionally, PS and ES were shown to enhance metabolic health of steers during growing period.
Keywords
Holstein; Calf; DFM; supplement; immunity;
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