RISS 검색 - 국내학술지논문

생균제 및 Colistin<sup>®</sup> 복합 첨가제의 급여가 산란계의 생산성과 계란의 품질에 미치는 영향

윤지연,김재영,김지숙,이보근,안병기,황용배,강성기,김동건,강창원,Yun, J.Y.,Kim, J.Y.,Kim, J.S.,Lee, B.K.,Ahn, B.K.,Hwang, Y.B.,Kang, S.K.,Kim, D.G.,Kang, C.W. 한국가금학회 2008 한국가금학회지 Vol.35 No.2

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This experiment was conducted to evaluate the dietary effects of mixture of probiotics and colistin on laying performance, intestinal microflora and egg yolk cholesterol in laying hens. One hundred sixty 50-wk-old Hy-Line Brown layers were divided into four treatments and fed a commercial diet (Control) or experimental diets containing 0.2% mixture of probiotics or probiotics and colistin mixture (T1, Bacillus subtilis + Aspergillus oryzae + Lactobacillus plantarum; T2, Bacillus subtilis + Aspergillus oryzae; T3, Bacillus subtilis + Aspergillus oryzae+colistin) for 8 wk. No significant differences were found in laying performance and liver weight among the groups. The Haugh unit of treated groups were significantly improved (P<0.05) compared to that of control, but eggshell qualities were not changed by the treatments. The cecal ammonia concentration was significantly decreased in both T1 and T3 groups. The number of coli forms in cecal content and feces were significantly reduced in all treated groups compared to that of Control (P<0.05). The egg yolk cholesterol contents in the groups fed the diet containing mixture of probiotics and colistin were reduced in comparison with that of Control. In conclusion, dietary supplementation of mixture of probiotics and colistin improved quality of egg albumen, and reduced the egg cholesterol contents. They also reduced intestinal coli forms without harmful effects on overall productive and physiological responses in laying hens.

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