가압식 스팀 챔버를 이용한 옥수수 후레이크의 반추위 소실율 및 에너지 가치 평가에 관한 연구
Study on Ruminal Disappearance and Energy Value of Corn Flake Using the Pressurized Steam Chamber
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초록
본 연구는 가압식 스팀 챔버를 이용하여 생산된 옥수수 후레이크의 반추위 영양소 소실율 및 TDN 가치 평가를 위해 수행되었다. 공시동물은 반추위 fistula가 장착된 한우 및 Holstein 암소 3두씩을 이용하였다. 시험구는 기존 스팀 챔버를 이용하여 생산된 옥수수 후레이크 대조구(control) 및 가압식 스팀 챔버를 이용하여 생산된 옥수수 후레이크 시험구(treatment)의 2처리로 하였다. 건물 소실율은 대조구에 비해 처리구에서 5.17% 높은 결과를 보였으며(p<0.01), 전분 소실율의 경우에도 대조구에 비해 처리구에서 높게 나타났다(p<0.01). NFE 및 NFC 소실율은 대조구에 비해 처리구에서 각각 6.08 및 5.71% 높은 결과를 보였다(p<0.01). 품종 및 배양시간별 반추위 건물, 전분, NFE 및 NFC 소실율은 대조구에 비해 처리구에서 높게 나타났다. 평균 TDN은 대조구에 비해 처리구에서 높은 결과를 보였으며(p<0.05), 한우와 젖소간의 비교에서는 한우에 비해 젖소에서 옥수수 후레이크의 TDN이 높은 경향을 보였지만, 통계적인 유의성은 인정되지 않았다. 따라서 본 연구의 결과에서 가압식 스팀 챔버의 도입은 옥수수 후레이크의 반추위 영양소(전분, NFE, NFC 등) 소실율 및 TDN 증가에 효과가 있는 것으로 판단된다.
Abstract
This study aimed to investigate the effect of using corn flakes, produced by pressurized steam chamber, on nutrient disappearance rate and energy value in three Hanwoo and three Holstein cows, implanted with a ruminal fistula. Corn flakes were categorized in 2 groups based on the chamber type: control (corn flakes produced using a steam chamber) and treatment (corn flakes produced using a pressurized steam chamber). Dry matter (DM) disappearance rate was 5.17% higher in treatment than in control (p<0.01). Starch disappearance rate was also higher in the treatment than in the control (p<0.01). Nitrogen free extract (NFE) and non-fiber carbohydrate (NFC) disappearance rates were 6.08 and 5.71% higher in treatment compared to control, respectively (p<0.01). In comparison by breed and incubation time, DM, starch, NFE, and NFC disappearance rates were higher in treatment than in control. The mean total digestible nutrients (TDN) was higher in treatment than in control (p<0.05). In comparison between Hanwoo and Holstein, TDN of corn flakes was slightly but not significantly higher in Holstein than in Hanwoo. Thus, these results indicate that the use of the pressurized steam chamber is recommended to increase the nutrient (starch, NFE, NFC etc.) disappearance rate and TDN.
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