Korean Journal of Poultry Science (한국가금학회지)

The Korean Society of Poultry Science (한국가금학회)
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Effect of Cecectomy on Nitrogen Utilization ]Rate and Uric Acid Excretion in Growing Chicks

성장중인 닭에 있어서 맹장절제수술이 질소의 이용률과 요산의 배설량에 미치는 영향

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

A 2 ${\times}$ 2 factorial experiment was conducted to determine the effect of cecectomy and urea supplementation on nitrogen utilization In growing chicks. Birds were either cecectomized or shamoperated and fed a 19% protein diet with or without 1% urea supplementation. All chicks were provided ad libitum access to feed and water throughout the six-day experimental period. In the cecectomized chicks, fred efficiency was significantly decreased when fed a 19% protein diet supplemented with 1% urea (P<0.05). When chicks were fed a 19% protein diet, cecectomy significantly shortened gastrointestinal passage time (GPT) of food (P<0.05). However, the GPT was significantly lengthened in chicks fed a 19% protein diet supplemented with urea (P<0.05). Regardless of diets, cecectomized chicks increased the moisture contents of the excreta (P<0.05) and feeding a 1% dietary urea also significantly increased (P<0.05). Cecectomy significantly decreased uric acid N excretion by about 30 mg per 100 g body weight per day (P<0.05) and uric acid N/ total N excretion when fed both diets (P<0.05). The present study suggests that cecectomy improves nitrogen utilization rate by decreasing uric acid excretion in growing chicks. These results are in good agreement with those obtained previously in a cecectomy study of adult chickens.

본 연구는 성장중인 닭에 있어서 질소 이용에 미치는 맹장절제 및 요소사료 첨가의 영향을 조사하기 위해서 실시되었다. 시험 사료는 19% 단백질 사료와 여기에 1% 요소를 첨가한 사료를, 시험 닭은 모의수술을 실시한 대조구와 맹장절제 수술을 실시한 처리구를 이용한 2 $\times$ 2의 요인시험법으로 행해졌다. 6일 동안의 본 시험기간 동안 물과 사료는 자유 섭취시켰다. 맹잘절제 수술닭의 사료효율은 요소의 급여에 의해서 유의하게 감소하였다(P<0.05). 19% 단백질사료 급여조건에서 맹장절제 수술 닭은 소화관내 사료의 통과시간을 유의하게 감소시켰지만(P<0.05), 반대로 19% 단백질사료 + 1% 요소 급여조건에서는 유의하게 증가시켰다(P<0.05). 맹장절제 수술은 사료에 관계없이 수분 배설량을 유의하게 증가시켰으며(P<0.05), 요소의 급여는 맹장절제 수술과 관계없이 수분의 배설량을 유의하게 증가시켰다(P<0.05). 양 사료 급여조건에서 맹장절제 수술은 요산 질소의 배설량을 체중 1009당 약 30 mg 정도씩 감소시켜서(P<0.05), 총 질소 배설에 대한 요산 질소의 배설비를 유의하기 감소시켰다(P<0.05). 결론적으로 성장중인 닭에서의 맹장절제 수술은 요산의 배설량을 감소시켜서 질소의 이용률을 개선 시켰으며, 본 연구의 결과는 이전에 성계를 통해서 얻어진 결과와도 일치하였다.

Keywords

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