Korean Journal of Poultry Science (한국가금학회지)

The Korean Society of Poultry Science (한국가금학회)
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Effects of Complex Direct-Fed Microbial Supplementation on Growth Performance and Nutrient Digestibility for Broilers

복합생균제의 급여가 육계의 성장능력과 영양소 소화율에 미치는 영향

  • Published : 2004.06.01
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Abstract

This study was conducted to investigate the effects of dietary direct-fed microbials(DFM) on the growth performance and nutrient digestibility in broiler chickens. A total of two hundred eighty eight broiler chickens were randomly allocated into six treaments with four replications and fed for five weeks. Dietary treatments included 1) CON (basal diet), 2) DFM-1(basal diet + 0.2% Enterococcus sp. ＆ Lactobacillus reuteri), 3) DFM-2(basal diet + 0.2% Enterococcus sp. ＆ Lactobacillus plantarum), 4) DFM-3(basal diet + 0.2% Enterococcus sp. ＆ Lactobacillus reuteri ＆ Lactobacillus plantarum), 5) DFM-4(basal diet + 0.2% Enterococcus sp. ＆ Lactobacillus reuteri ＆ Lactobacillus plantarum ＆ Yeast), 6) DFM-5(basal diet + 0.2% Enterococcus sp. ＆ Lactobacillus reuteri ＆ Lactobacillus plantarum ＆ Bacillus subtilis). During the period of 1∼3weeks, average daily gain (ADG) and Feed/Gain were not significant different among treatments. In the later(3∼5weeks) and overall period(l∼ 5weeks), ADG and Feed/Gain tended to be improved in DFM treatments compared to the control. However, there were no significant differences among DFM complexes and between control and DFM treatments. The broilers fed DFM-3 diet was showd poor growth performance compared to the broilers fed DFM-l diet and similar to the broilers fed DFM-2 diet but there was no significant differences. The treatments of DFM-4 diet added Yeast and DFM-5 added Bacillus subtilis were improved in ADG and Feed/gain but no significant differences were found and also there was no specific DFM treatments in experiment period. In digestibility, the broiler chicks fed DFM treatments tended to improve N digestibility compared to control treatment. However, they were not significantly different among the treatments. In conclusion, DFM tended to improve growth performance in later stage of broiler.

본 연구는 사료내 복합생균제의 첨가에 따른 육계의 성장률 및 영양소 소화율에 미치는 영향을 알아보고자 실시하였다. 사양시험은 2일령 Arbor Acre Broiler(♂) 288수를 공시하였고, 사양시험은 5주간 실시하였다. 시험설계는 옥수수-대두박 위주의 사료인 1) 대조구(CON, basal diet), 2) DFM-1(basal diet + 0.2% Enterococcus sp. ＆ Lactobacillur reuteri), 3) DFM-2(basal diet + 0.2% Enterococcus sp. ＆ Lactobacillus plantarum), 4) DFM-3(basal diet + 0.2% Enterococcus sp. ＆ Lactobacillu reuteri ＆ Lactobacillu plantarum), 5) DFM-4(basal diet + 0.2% Enterococcus sp. ＆ Lactobacillus reuteri ＆ Lactobacillus plantarum ＆ Yeast), 6) DFM-5(basal diet + 0.2% Enterococcus sp. ＆Lactobacillus reuteri ＆ Lactobacillus plantarum ＆ Bacillus subtilis)로 6개 처리로 하였다. 처리당 4반복 12수씩 완전임의 배치하였다. 시작 후 1주까지 생균제 처리구에서 증체량과 사료효율 등에서 대조구보다 높은 결과를 보였으나 유의적인 차이는 없었다. 3∼5주의 기간에서는 생균제 첨가구에서 증체량이 대조구에 비해 개선된 효과를 보였으나 유의적인 차이는 없었다. 전 시험기간에 걸친 변화를 보면 생균제를 첨가한 처리구에서 유의적인 차이는 없었으나 대조구보다 증체량이 높은 경향을 보여 육계 사육기간의 초, 중반기에서 후반기로 갈수록 증체량과, 사료섭취량, 사료효율 등에서 대조구에 비해 개선된 결과를 보였다. DFM-3처리구는 DFM-1보다 성장능력이 낮았으며 DFM-2와 유사하였고, 효모와 Bacillus subtilis가 혼합된 DFM-4와 DFM-5처리구는 높은 성장능력을 보였으나 유의적인 차이는 없었으며 특정생균제의 효과도 발견할 수 없었다. 영양소 소화율은 질소 소화율에서 생균제 처리구가 향상되는 경향을 보였으나 통계적인 차이는 없었다. 결론적으로 복합생균제의 첨가가 복합생균제간 또는 생균제 처리구와 대조구간에는 육계의 생산성에 유의적 차이는 없었으나 후기에 있어서 증체량 및 사료효율을 향상시키는 경향이 있었다.

Keywords

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