A Study on the Correlation of Cecal Anaerobic Bacterial Counts with Cecal Length in Growing Chicks

성장중인 닭에 있어서 맹장내의 혐기성 미생물수와 맹장 길이와의 관계에 관한 연구

  • Son, J.H. (Kyungbuk Livestock Research Institute)
  • Published : 2002.12.01

Abstract

A study was conducted to investigate the correlation of cecal anaerobic bacterial counts with the cecal length in growing chicks. Half of 160 chicks of five weeks old were housed in cages and the remainings were kept with goats in free-range and allowed to have free access to goat's feed and faeces. All the experimental birds were fed ad libitum on a commercial chick formula diet during the period of 5 to 12 weeks of age. Body weight was larger in birds reared in the cage than in those reared on the field at 8 weeks of age (P<0.05), but vice versa at the end of experiment (P<0.05). The cecal length was longer in field-rearing than in cage-rearing at 6, 9, 10 and 11 weeks of age (P<0.05). The cecal length was correlated with body weight gain in both rearing groups (r=0.816 f3r cage-rearing, r=0.816 for field-rearing). The cecal anaerobic bacterial counts were significantly higher in field- rearing than in cage-rearing at 6, 9, 10 and 11 weeks of age (P<0.05). The cecal length was highly correlated with cecal anaerobic bacterial counts in cage- (r=0.9549) and field-(r=0.9866) rearing. It is concluded that the correlation of increase cecal length with increased cecal anaerobic bacterial counts ted a libelous of goat's faeces in growing chicks.

본 연구는 성장중인 닭에 있어서 맹장내 혐기성 미생물수와 맹장의 길이와의 관계를 구명하기 위해서 실시되었다. 5주령의 160수의 닭을 80수씩 분리하여 케이지내 사육 (대조구)및 염소 방목장내 염소와 같이 사육 (처리구)의 2처리로 구분하여 실시하였으며, 본 시험기간동안의 사료는 닭의 성장단계에 적합한 시판의 사료를 기초사료로 활용하였다. 시험기간 (5∼8주형)까지의 증체량은 8주령 에서는 대조구가 처리구보다 유의하게 놀았으며(P<0.05), 12주령에서는 처리구가 대조구보다도 유의하게 높았다(p<0.05). 맹장의 길이는 6, 9, 10 및 11주령에 처리구가 대조구보다 유의하게 길었다 (P<0.05). 맹장내 총 혐기성미생물수도 6, 9, 10 빛 11주령에 처리구가 대조구보다 유의하게 많았다(P<0.05). 대조구 및 처리구 함께 맹장의 길이와 증체량간에는 r= 0.816의 상관관계가 인정되었다. 맹장의 길이와 맹장내 혐기성 미생물 수는 대조구 및 처리구 함께 r=0.95이상의 높은 상관 관계가 인정되었다(P<0.01). 결론적으로 성장중인 닭에 있어서 섬유소 함량이 높은 염소의 배설물 섭취 등의 영향에 따른 맹장내 혐기성 미생물 수의 증가가 맹장의 길이 증가에 관계되어진다.

Keywords

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