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CIE L 기준에 의한 PSE 육과 정상육의 육질 및 도체특성에 관한 연구
정일병,이무하,김태헌,이영창,김동훈,김일석,채현석,김웅배 한국축산학회 1998 한국축산학회지 Vol.40 No.6
Two hundreds and twenty two pork carcasses from a commercial breed were investigated for meat quality and carcass traits of PSE and normal pork classified by CIE L value. pH and conductances were taken on 1(pH₁, C₁), 3(pH₃, C₃), 6(pH_6, C_6) and 24 hr postmortem(pHu, C_u). Significant differences between PSE and normal pork were observed in pH₁, pH_u (p $lt; 0.001) and pH₃(p $lt; 0.05). But, no significant difference was found in pH_6. Although, there was no significant difference in C₁, significant differences are found in C₃(p $lt; 0.05), C_6 (p $lt; 0.01) and C_u(p$lt;0.001). The water holding capacity(WHC) were significantly lower(p$lt;0.01) in the PSE compared to the normal pork. The cooking loss were significantly higher(p $lt; 0.05) in the PSE compared to the normal pork. The CIE L value was highly related with NPPC color scale(R²=0.77), moderately related with pH_u (R²=0.45), C_u(R²=0.57), WHC(R²=0.49), cooking loss(R²=0.45) and juiciness(R²=0.43), and poorly related with pH₃(R²=0.27), pH_6(R²=0.27) and conductances(R²=0.05-0.15). Consequently, the results suggest that pork quality classification by CIE L value expresses obvious differences in most of important pork quality parameters like pH₁, pH_u, C_u visual color and WHC.
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정근기,김웅배,고기환 한국동물자원과학회 2001 한국축산학회지 Vol.43 No.6
본 연구에서는 송아지 입식기간 사양체계를 확립하고저 농후사료의 조단백질 수준(시험 1), 농후사료 급여량(시험 2) 및 조사료 급여체계(시험 3)가 한우 송아지의 능력에 미치는 영향을 규명하였다. 시험 1에서는 한우 수송아지(평균체중 135.7㎏) 38두를 세 처리구(조단백질 13, 15 및 17%)에 배치하여 28일간 사육하였다. 입식후 첫 1주간 일당증체량에서 15%구와 17%구는 유의한 차이가 없었으나, 15%구는 13%구보다 유의하게 높았다.(P<.05). 13%구와 17%구간에도 유의한 차이는 없었지만, 17%구가 46.9%만큼 더 높았다. 전 시험기간에 걸쳐 각 처리구 간에 유의차는 없었지만, 15%구가 가장 높은 일당증체량과 사료섭취량, 그리고 가장 낮은 사료요구율을 보였다. 시험 2에서는 한우 수송아지 20두(평균체중 147.0㎏)를 두 처리구에 배치하고 농후사료 급여량을 각각 체중의 0.6과 0.8%로 시작하여 매주 0.2%씩 증가시켜 28일간 사육하였다. 입식후 첫 2주간에 개시 급여량이 체중의 0.8%인 시험구가 0.6%인 구보다 8.9% 더 증체되었지만 통계적 유의차는 없었다. 전 시험기간에 걸쳐서 두 구간의 일당증체량 차이는 다소 적었으나 첫 2주간에 나타난 결과와 비슷한 경향을 보였다. 시험 3에서는 한우 수송아지 56두(평균체중 145.9㎏)를 14두씩 나누어 42일간 네 가지 조사료 급여체계를 비교하였다. 처리 1, 2구에서는 42일간 각각 무처리 볏짚 또는 암모니아 처리볏짚 만을, 처리 3구에서는 첫 28일간은 건초, 그후 14일간은 무처리 볏짚을, 그리고 처리 4구에서는 첫 14일간은 건초, 그후 28일간은 무처리 볏짚을 급여하였다. 입식후 첫 2주간 건초를 급여한 3, 4구가 볏짚을 급여한 1, 2구보다 일당증체량과 사료섭취량이 높고, 사료요구율이 낮은 것으로 나타났으며, 건초 급여구중에서는 건초 급여기간이 길었던 3구가 시험 기간이 진행됨에 따라 더 유리한 증체량을 유지하였다. 볏짚 급여구 중에서는 암모니아 처리볏짚을 급여한 2구가 더 낮은 일당증체량을 보였다. 전 시험기간으로 볼 때도 일당증체량은 일정 기간 건초를 급여한 두 구가 볏짚을 급여한 두 구보다 훨씬 더 높았고, 무처리 볏짚구와 암모니아 처리 볏짚구는 비슷한 증체를 나타내었다. 따라서 볏짚은 입식사료의 단일 조사료원으로 부적절하였다. 이와 같은 세 시험의 결과로 볼 때, 입식후 첫 1∼2주간의 증체가 전체 입식기간의 증체에 큰 영향을 주었으며, 조단백질 15%수준의 농후사료를 체중의 0.8% 수준에서 시작하여 매주 0.2%씩 증가시켜 급여하고 적어도 2주간은 양질의 건초를 급여하는 것이, 송아지가 입식기간에 조속히 건강을 회복하고 그 후 빠르게 증체하는데 필요한 것으로 판단되었다. Three experiments were conducted to establish a feeding system for newly received Hanwoo calves: the effects on growth performance were determined of crude protein level in the concentrate (Trial 1), the quantity of concentrate fed (Trial 2) and four different roughage feeding regimen (Trial 3). In Trial 1, thirty eight heads (average BW 135.7㎏) were assigned to one of three crude protein levels of the concentrate (13, 15 and 17%). The concentrate was fed at a rate of 1.0% of the initial BW at the beginning and increased by 0.2% of BW every 7 days. Hay was fed ad libitum in the entire period. During the first week, a significantly higher daily gain (P<.05) was obtained in the 15% group than in th 13% group. However, there was no significant difference between the 15% and 17% group. For the entire 28-day period, the growth performance was better in the 15% group, resulting in an 15.3% improvement of daily gain. In trial 2, twenty heads (average BW 147.0㎏) were divided into two group (low and high) in which the quantity of concentrate fed was different: the amount of concentrate at the beginning was 0.6% and 0.8 % of the initial BW in the two groups, respectively, and increased by 0.2% of BW every 7 days. Daily gain in the first two weeks was 8.9% greater in the high group than in the low group and a similar tendency was observed in the entire 28-day period, although the difference was smaller. In trial 3, fifty six calves (average BW 145.9㎏) were allotted to one of four different roughage feeding regimen: 1)untreated rice straw for the entire period of 42 days, 2) ammoniated rice straw for 42 days, 3)hay for the first 28 days followed by untreated rice straw for the remaining 14 days, and 4) hay for the first 14 days followed by untreated rice straw for the remaining 28 days. During the first two weeks, daily gain and feed conversion were improved and feed intake increased by feeding hay. Rice straw, either untreated or ammoniated, resulted in a lower performance than hay, with ammoniated rice straw being the lowest in daily gain. When the hay feeding period was extended from 14 to 28 days, the high growth performance was maintained in the remaining trial period. These results suggest that rice straw was not sufficient as a single roughage source for newly received calves. It was concluded that daily gain in the first one or two weeks affected that in the entire adjustment period to a large extent, and that newly received Hanwoo calves maintained a better gain with rapid recovery of health when a concentrate containing 15% CP was fed at the rate of 0.8% of the initial BW at the beginning and increased by 0.2% of the BW each week together with good quality hay given at least for the first two weeks.
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