Korean Journal of Poultry Science (한국가금학회지)

The Korean Society of Poultry Science (한국가금학회)
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Effect of Dietary Supplementation of Artificial and Natural Zeolites on Performance and Intestinal Microbes of Broiler Chicks

인공 및 천연 제올라이트의 급여가 육계의 생산성과 장내 미생물에 미치는 영향

  • 류경선 (전북대학교 바이오식품 소재 개발 및 연구센터) ;
  • 박재홍 (전북대학교 동물자원과학과) ;
  • 이덕배 (호남농업시험장) ;
  • 김상호 (축산기술연구소 대전지소) ;
  • 신원집 (전북대학교 동물자원과학과)
  • Published : 2002.06.01
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Abstract

An experiment was conducted to compare the influences of artificial zeolite(AZ) produced from fly ash and natural zeolite(NZ), those were supplemented into broiler diets, on performances, intestinal microbes and some blood chemistry for 5 wks. The experimental diets contained 21.5 and 19% CP fur starting and finishing period, respectively. The ME was 3,100 kcal/kg of feed in both starter and finisher diets. Three hundred twenty chicks were assigned to 5 treatments with 4 replicates and fed one of five experimental diets containing different levels of AZ or NZ ; 0% zeolite, 1.5% AZ, 3.0% AZ, 1.5% NZ, and 3.0% NZ. Weight gain, feed intake and feed conversion were measured with weekly basis. Blood cholesterol and intestinal microflora were analyzed at the end of the experiment. Weight gain of chicks fed with NZ tended to increase, but was not statistically different from other diet groups. However, the birds of fed with 3.0% AZ showed significant decrement of weight gain compared to that of control(P<0.05). No significant difference in feed intake was found among five treatment. Feed conversion was significantly improved in 3.0% NZ treatment relative to that of 3.0% AZ(P<0.05). There were no consistent differences in intestinal microbes between the control and zeolite groups. Blood cholesterol was significantly lower in 3.0% NZ treatments than the others(P<0.05). These results suggest that AZ can be added to broiler feeds less than 1.5% without any detrimental effects on chick performances.

본 실험은 석탄재를 이용하여 합성한 인공제올라이트 (AZ)의 사료적 가치를 구명하기 위하여 천연제올라이트(NZ)와 동일한 수준으로 첨가 . 급여하여 육계의 생산성, 장내 미생물 및 혈중 콜레스테롤 등에 미치는 영향을 5주간 고찰하였다. 전기 3주 동안 사료내 조단백질은 21.5%, ME 3,100 kal/kg으로 하였고, 후기에는 조단백질 19%, ME 3,100kcal /kg 수준으로 급여하였다. 처리구는 대조구(제올라이트 0%), AZ와NZ를 각각 1.5,3.0% 씩 육계용 사료에 배합하였으며, 처리구당 4반복, 반복당 16수로 전체 320수를 공시하였다. 조사항목으로 증체량, 사료섭취량, 사료요구율은 주간별로 측정하였다. 장내 미생물, 혈중 콜레스테롤 및 뉴켓슬병 백신에 대한 항체가는 실험종료시에 측정하였다. 증체량은 NZ 처리구에서 증가하는 경향을 보였으나 대조구와 통계적인 차이가 없었고, AZ 3.0%처리구는 대조구에 비하여 현저하게 감소하였다(P<0.05). 사료섭취 량은 처리구간에 차이가 없었으며 사료요구율은 AZ 3.0% 처리구에 비하여 NZ 3.0%가 현저하게 개선되었다(P<0.05).제올라이트가 육계의 장내 미생물에 미치는 영향은 대조구와 차이가 없었으며 혈중 총콜레스테롤은 NZ 처리구에서 현저하게 감소되었고 뉴켓슬병백신에 대한 항체가는 제올라이트 처리구가 현저하게 증가하였다(P<0.05). 본 실험의 결과, AZ 1.5% 급여수준은 육계의 생산성에서 대조구와 차이가 없었으므로 육계 사료에 이용될 수 있는 수준으로 사료된다.

Keywords

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