Effect of supplementary zinc-bacitracin on straw-manure-bran-silage fermentation
1988
Lee, I.O. | Yoon, C.S. | Park, J.H. | Lee, N.H. (Korea Advanced Inst. of Science and Technology, Seoul (Korea R.)) | Min, K.H. (Sookmyung Women's Univ., Seoul (Korea R.). Dept. of Biology Sciences)
Bacitracin residue in straw-manure-bran-silage was measured to ascertain the possible hazardness of hen manure as animal feed resources. The effect of supplementary zinc bacitracin (150mg/kg of silage) was studied during 25 ensiling days. Lactic acid production was half level of control group, and the number of Lactobacillus spp. was one tenth of control group in the zinc bacitracin group. Silage pH of zinc bacitracin addition was higher than control group for 15 ensiling days. Antimicrobial activity of supplemented zinc bacitracin could not be detected in the silage after 20 ensiling days. No effect of supplemented bacitracin was found in VFA (volatile fatty acid) production, proximate composition, mineral contents, amino acid contents, and total microorganisms. The possible zinc bacitracin residue problem in hen manure for animal feed resources could be excluded according to present results
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