Korean Journal of Poultry Science (한국가금학회지)

The Korean Society of Poultry Science (한국가금학회)
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Effects of Dietary Levels of Corn Distiller's Dried Grains with Solubles and Phytase on Performance and Nutrient Utilization of Broilers

옥수수 주정박의 수준과 Phytase의 첨가 유무가 육계의 생산성과 영양소 이용률에 미치는 영향

  • 홍의철 (농촌진흥청 국립축산과학원) ;
  • 나승환 (농촌진흥청 국립축산과학원) ;
  • 유동조 (농촌진흥청 국립축산과학원) ;
  • 김학규 (농촌진흥청 국립축산과학원) ;
  • 박미나 (농촌진흥청 국립축산과학원) ;
  • 정기철 (농촌진흥청 국립축산과학원) ;
  • 추효준 (농촌진흥청 국립축산과학원) ;
  • 박희두 (농촌진흥청 국립축산과학원) ;
  • 정완태 (농촌진흥청 국립축산과학원) ;
  • 황보종 (농촌진흥청 국립축산과학원)
  • Published : 2009.09.30
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Abstract

This work was conducted to investigate the effects of the addition level of Corn distiller's dried grains with solubles (CDDGS) and phytase in broiler diets on the broiler performance and the ileal amino acid digestibility. Three eighty four Ross broiler (one-day-old) were assigned randomly to 8 treatments groups (12 birds/pen, 4 pens/treatment) as $4{\times}2$ complex factors of CDDGS 4 treatments (0, 5, 10 and 15%) and phytase 2 treatments (0, 500 FTU/kg), and fed experimental diets for 6 weeks (starter, 0~2 wk; grower, 2~4 wk; finisher, 4~6 wk). After the feeding trial was finished, 12 broilers (6 weeks) with similar weights were selected from all treatments to investigate the digestibility of nutrients and amino acids for the first week. The experimental diets contained similar ME and CP of all treatments. Body weight gains and feed intakes were high at phytase treatments (P>0.05), but there was no difference in feed intake of the chicks. The amino acid digestibilities of diets were improved for iso-leucine, lysine, threonine, valine, aspartic acid, proline, serine and tyrosine (P<0.05). Finally, this work showed that growth performance and amino acid digestibility were improved by the addition of CDDGS and phytase in broiler diets.

본 시험은 육계 사료내 CDDGS의 첨가 수준과 phytase의 첨가유무가육계의생산성과영양소이용률에미치는영향을 구명하기 위해 수행하였다. 공시계는 시판 육계(Ross 308) 수컷 384수를 공시하였으며, CDDGS 4처리(0, 5, 10, 15%)와 phytase 2처리(0, 500 FTU/kg)의 $4{\times}2$ 복합 요인으로 총 8처리구, 처리구당 4반복, 반복당 12수를 체중별로 완전임의 배치하였다. 사양 시험이 끝난 육계는 체중이 유사한 개체를 12수씩 선별하여 1주간 동일 사료 급여 후 1주간 소화 시험을 실시하였다. 시험 사료는 육계 초기(0~2주), 전기(2~4주)와 후기(4~6)의 기본 사료에 CDDGS를 0, 5, 10 및 15% 첨가하였으며, ME가와 CP는 일정하게 유지하였다. 육계 사양기간 동안의 증체량과 사료 효율은 phytase 처리구에서 높게 나타났으며(P<0.05), 사료 섭취량은 모든 처리구간에 차이가 없었다. 일반성분의경우, 건물과조단백질의소화율은 전처리 구간에 차이가 없었으나, 조지방의 소화율은 CDDGS 5% 처리구에서 75.8%로 유의적으로 낮았다(P<0.05). 조섬유의 소화율은 CDDGS와 phytase 첨가구에서 소화율의 증가를 보였다(P<0.05). 필수 아미노산의 경우, iso-leucine, lysine, threonine 및 valine에서 소화율이 증가하였으며(P<0.05), 비필수 아미노산은 aspartic acid, proline, serine 및 tyrosine에서 소화율이 개선되었다(P<0.05). 따라서, 본 시험에서 육계 사료 내 CDDGS와 phytase 첨가는 육계의 생산성과 영양소 이용률을 개선시켰다.

Keywords

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