Bacillus sp. 접종 우모분이 비육돈의 생산성과 도체특성에 미치는 영향
Effect of Dietary Bacillus sp. Inoculated Feather Meal on the Performance and Carcass Characteristics in Finishing Pigs
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본 시험은 우모분의 사료적 가치를 향상시키기 위하여 우모 단백질 분해균인 Bacillus sp.를 우모분에 접종하여 비육돈의 단백질 공급원인 대두박에 수준별로 대체하여 총 5처리구로 설정하였으며, 각 처리구당 3반복으로 임의배치하였다. 시험사료 급여구의 증체량, 사료요구율, 육의 아미노산 함량 및 도체특성을 조사․분석하였다. 사양시험은 5처리×3반복×10두로서 총 150두를 공시하여 70일간 실시하였다. 비육 전기간(0~70일간) 동안의 일당증체량은 Bacillus sp. 접종 우모분으로 대두박의 20%를 대체․급여한 BSM 20구가 0.95kg으로서 일반 우모분으로 10%와 20%를 대체․급여한 CSM 10구와 CSM 20구의 0.80~0.81kg에 비하여 증가 하였으며, 사료요구율도 2.94로서 우수하였다(P<0.05). 도체중은 BSM 10구와 BSM 20구가 각각 81.84kg과 83.77kg으로서 CSM 10구와 20구의 74.75kg과 76.07kg에 비하여 유의적으로(P<0.05) 증가하였다. A등급 출현율은 BSM 20구가 35.03%로서 대조구의 32.78%에 비하여 뚜렷하게 향상되었다. 육색의 CIE L*값은 BSM 10구가 45.56으로서 가장 낮았으며, CSM 20구는 59.96으로서 가장 높았다(P<0.05). CIE a* 값은 대조구가 9.35로서 BSM 10구와 BSM 20구의 7.56과 7.42에 비하여 높았다(P<0.05). 이상의 결과를 종합하면, 비육돈을 사육할 경우에는 Bacillus sp. 접종 우모분으로 대두박의 20%를 대체․급여함으로서 체중의 증가 및 사료요구율이 개선되었으며, 돼지 등심의 육색과 지방색에도 이상이 없을 뿐 아니라 육질 A등급 출현율도 크게 향상되었다. 특히, 일당 증체량으로 환산할 경우에는 출하일령을 약 8일 정도 단축시킬 수 있기 때문에 대체 단백질 사료자원의 확보 뿐만 아니라 농가 소득증대에도 크게 기여할 것으로 사료된다.
Abstract
This study was carried out investigate the effect of replacing soybean meal with feather meal or Bacillus sp. inoculated feather meal in finisher pig diets on the performances, and amino acid composition and carcass characteristics of pork. One hundred fifty pigs were randomly allotted to five dietary treatments (① control, basal diet; ② BSM (bacillus sp. inoculated soybean meal) 10, 10% of soybean meal was replaced with bacillus sp. inoculated feather meal; ③ BSM 20, 20% of soybean meal was replaced with bacillus sp. inoculated feather meal; ④ CSM (conventional soybean meal) 10, 10% of soybean meal was replaced with conventional feather meal and ⑤ CSM 20, 20% of soybean meal was replaced with conventional feather meal) in a 70-days feeding trial. In overall period, body weight gain of BSM 20 (0.95kg) was higher (P<0.05) than those of CSM 10 (0.80kg) and CSM 20 (0.81kg), respectively. And feed conversion of BSM 20 (2.94) was lower (P<0.05) than that for other treatments (3.06~3.41). Carcass weight of BSM 10 (81.84kg) and BSM 20 (83.77kg) were greater (P<0.05) than those of CSM 10 (74.75kg) and CSM 20 (76.07kg), respectively. Proportion of grade A carcass in BSM 20 (35.03%) was higher compared to the control treatment (32.78%). CIE L* of meat color was lowest in the BSM 10 (45.56), and hightest (P<0.05) in the CSM 20 (59.96). In addition CIE a* of meat color of control (9.35) highest (P<0.05) than those of BSM 10 and BSM 20 were 7.56 and 7.42, respectively.
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