Journal of Animal Science and Technology

Korean Society of Animal Sciences and Technology (한국축산학회)
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Effects of Dietary Probiotic on Performance, Noxious Gas Emission and Microflora Population on the Cecum in Broiler

복합 생균제 첨가가 육계 생산성, 유해가스 발생량 및 맹장내 균총에 미치는 영향

  • Ko, Y.D. (Division of Applied Life Science, Gyeongsang National University) ;
  • Sin, J.H. (Division of Applied Life Science, Gyeongsang National University) ;
  • Kim, S.C. (Division of Applied Life Science, Gyeongsang National University) ;
  • Kim, Y.M. (Division of Applied Life Science, Gyeongsang National University) ;
  • Park, K.D. (Division of Applied Life Science, Gyeongsang National University) ;
  • Kim, J.H. (Korea Applied Microorganism Institute Research)
  • 고영두 (경상대학교 응용생명과학부) ;
  • 신재형 (경상대학교 응용생명과학부) ;
  • 김삼철 (경상대학교 응용생명과학부) ;
  • 김영민 (경상대학교 응용생명과학부) ;
  • 박기동 (경상대학교 응용생명과학부) ;
  • 김재황 (한국응용미생물산업연구소)
  • Published : 2003.08.30
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Abstract

This study was carried out to investigate the effect of probiotics on the performance, nutrients digestibility, noxious gas emission and microflora population on the cecum of broilers. A total of 120 broilers, consisted of 4 treatments X 3 replicates X 10 broilers per replicates, were fed the experimental diets containing 0, 0.1, 0.3 and 0.5％ probiotics for 5 weeks. Broilers fed the diets containing 0.1 and 0.3％ probiotic had higher (p<0.05) body weight gain and feed conversion than those of the others from the 3rd to 4th week. Broilers fed 0.3％ probiotic had higher (p<0.05) body weight gain and feed conversion than those of the other levels from the 5th to 6th week. Broilers fed the diets containing 0.1% and 0.3％ probiotic had higher (p<0.05) body weight gain and feed conversion than those of the others from the 2nd to 6th week. Dry matter digestibility was significantly (p<0.05) improved with 0.3% probiotic. Emission of ammonia and sulfate hydrogen gas was significantly (p<0.05) decreased at 6th week. However, there was no (p<0.05) difference at the levels of 0, 0.1, 0.3 and 0.5% at the 4th weeks. There was an increase in the lactobacillus sp, but there was a decrease in the microflora population of coliforms in the cecum of broiler with 0.1% and 0.3% probiotics. These results indicated that the compound probiotics of 0.1${\sim}$0.3% were effective in the body weight gain, feed conversion, nutrients digestibility, noxious gas emission and microflora population on the cecum in broilers.

본 연구는 유산균류 2종(Lactobacillus acidophilus, Lactobacillus bulgaricus)에 효모(Saccharomyces cerevisiae), 곰팡이 2종(Trichoderma, Rhizopus) 및 일반세균류 2종(Bacillus subitilis, Pseudomonas putida)이 혼합된 복합생균제를 육계사료에 0.1%, 0.3% 및 0.5% 수준으로 첨가하여 급여하였을 때 생산성, 영양소소화율, 유해가스 발생량 및 장내균총에 미치는 효과와 적정 첨가 수준을 구명하기 위하여 4처리, 3반복, 반복당 10씩 총 120수 공시하여 5주간의 사양시험과 5일간의 소화시험을 실시하였다. 3${\sim}$4주령의 증체량과 사료요구율은 생균제 0.1%와 0.3% 첨가구가 대조구와 생균제 0.5% 첨가구에 비하여 개선되었다(p<0.05). 5${\sim}$6주령의 증체량과 사료요구율은 생균제 0.3% 첨가구가 대조구에 비해 개선되었다(p<0.05). 사양시험 전기간(2${\sim}$6주)의 증체량과 사료요구율은 생균제 0.1%와 0.3% 첨가구가 대조구와 생균제 0.5% 첨가구에 비해 높았다(p<0.05). 건물소화율은 생균제 0.3% 첨가구가 대조구와 생균제 0.5% 첨가구에 비해 높았다(p<0.05). 6주령의 $NH_3$가스와 $H_2S$가스는 생균제를 첨가함으로써 대조구에 비하여 감소(p<0.05)하였으나, 4주령에는 대조구를 포함한 모든 처리구에서 유의차는 없었다. 맹장내 Lactobacillus sp.는 생균제 첨가구들이 대조구에 비해 증가되었으나, Coliforms은 생균제 첨가구들이 대조구에 비해 감소하였다. 이상의 결과를 종합하면, 증체량, 사료요구율, 영양소 소화율, NH3와 H2S 발생량 및 맹장내 균총은 복합생균제를 0.1${\sim}$0.3% 수준으로 첨가하여 급여하는 것이 가장 효과적인 것으로 사료된다.

Keywords

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