• 제목/요약/키워드: Meat Yield Index

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Effect of Feeding a Mixed Microbial Culture Fortified with Trace Minerals on the Performance and Carcass Characteristics of Late-fattening Hanwoo Steers: A Field Study

  • Kwak, W.S.;Kim, Y.I.;Lee, S.M.;Lee, Y.H.;Choi, D.Y.
    • Asian-Australasian Journal of Animal Sciences
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    • 제28권11호
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    • pp.1592-1598
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    • 2015
  • This study was conducted to determine the effects of feeding a trace minerals-fortified microbial culture (TMC) on the performance and carcass characteristics of late-fattening Hanwoo steers. A mixture of microbes (0.6% [v/w] of Enterobacter sp., Bacillus sp., Lactobacillus sp., and Saccharomyces sp.) was cultured with 99% feedstuff for ensiling and 0.4% trace minerals (zinc, selenium, copper, and cobalt). Sixteen late-fattening steers (mean age, 21.8 months) were allocated to two diets: a control diet (concentrate mix and rice straw) and a treated diet (control diet+3.3% TMC). At a mean age of 31.1 months, all the steers were slaughtered. The addition of TMC to the diet did not affect the average daily weight gain of the late fattening steers, compared with that of control steers. Moreover, consuming the TMC-supplemented diet did not affect cold carcass weight, yield traits such as back fat thickness, longissimus muscle area, yield index or yield grade, or quality traits such as meat color, fat color, texture, maturity, marbling score, or quality grade. However, consumption of a TMC-supplemented diet increased the concentrations of zinc, selenium, and sulfur (p<0.05) in the longissimus muscle. With respect to amino acids, animals consuming TMC showed increased (p<0.05) concentrations of lysine, leucine, and valine among essential amino acids and a decreased (p<0.05) concentration of proline among non-essential amino acids. In conclusion, the consumption of a TMC-supplemented diet during the late-fattening period elevated the concentrations of certain trace minerals and essential amino acids in the longissimus muscle, without any deleterious effects on performance and other carcass characteristics of Hanwoo steers.

조사료원의 차이가 한우 거세우의 생산성 및 육질에 미치는 영향 : 메타분석 (Effect of Different Forages on Growth Performance, Meat Production and Meat Quality of Hanwoo Steers : Meta-analysis)

  • 조상범;이상무;김은중
    • 한국초지조사료학회지
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    • 제32권2호
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    • pp.175-184
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    • 2012
  • 본 연구에서는 양질 조사료의 급여가 한우 비육우의 사양성적, 육생산성 및 육질에 미치는 효과를 메타분석기법을 이용하여 분석하였다. 효과분석은 국내에서 수행된 논문들을 대상으로 총 5편의 들을 인용하였다. 양질조사료를 급여한 시험구를 처리구로 하고 볏짚을 급여한 시험구를 대조구로하여 처리구 결과와 대조구 결과의 평균차를 이용하여 효과의 크기를 분석하였고, 요약효과는 임의효과모형을 이용하여 산출하였다. 그 결과, 사양성적에 대한 정의효과는 사료섭취량, 일당증체량, 종료 체중 및 사료효율 모두에서 나타났으며, 유의성은 일당 증체량에서만 발견되었다. 육생산량에 대한 정의효과는 도체중, 배측최장근 면적 및 생산성 지수에서 나타났고, 등지방두께에서는 부의효과가 나타났다. 유의성은 도체중과 배최장근 면적에서만 나타났다. 육질에 대한 정의효과는 marbling score와 지방색에서 정의 효과가 나타났으며, 육색은 부의효과가 나타났으나 유의적 효과는 발견되지 않았다.

한우에서 혈중 호르몬 및 대사물질 농도와 성장 및 도체 형질에 대한 표현형 상관에 관한 연구 (Phenotypic Correlation for Concentrations of Hormones and Metabolic Materials and Growth and Carcass Traits in Hawoo)

  • 전기준;최재관;이명식;정영훈;정호영;이종경;임석기;이창우;박정준
    • 한국수정란이식학회지
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    • 제18권3호
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    • pp.203-213
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    • 2003
  • 혈액성분과 경제형질들 간의 상관관계를 규명하는 일은 한우의 능력을 예측하고 예견되는 능력에 맞추어 사양관리와 판매처를 결정할 수 있고, 기존의 종축선발 체계와 결합시킴으로서 선발의 정확도를 향상시킬 수 있는 효과를 기대할 수 있으므로 나름대로 중요한 의미를 갖는다. 본 연구는 축산기술연구소에서 사육하고 있는 한우 866두의 혈액 중 호르몬과 대사물질을 분석하여 혈액성분과 경제형질과의 표현형 상관관계를 분석하고 혈액 내 유용한 생리적인 형질을 발굴하여 능력이 우수한 개체의 조기선발 가능성 구명과 선발 기술을 개발하여 한우개량에 또 다른 방법을 제시 하고자 실시하였다. 혈청성분들과 경제형질들 간의 표현형 상관계수를 거세우와 비거세우로 구분하여 추정한 결과 혈청성분들과 도체형질들 간의 주요 상관은 다음과 같다. 24개월 출하체중과 상관도가 높은 혈청은 거세우에서는 BUN이었고 비거세우에서는 albumin과 IGF-1이었으며, 비육말기 21∼24개월령의 일당증체량과 상관도가 높은 혈청은 거세우에서는 cal-cium이었고 비거세우에서는 albumin으로 증체와 관련 있는 혈청은 거세우에서는 calcium 비거세우에서는 albumin으로 나타났다. 육질과 관련 있는 등지방 두께 및 지방교잡도와 상관도가 가장 높은 혈청은 거세우와 비거세우 모두 BUN이었고, 육량등급의 근간이 되는 육량지수와 상관도가 높은 혈청은 거세우에서는 calcium이었으며 비거세우에서는 testosterone이었으나 육질과 상관이 높은 BUN은 거세우와 비거세우 모두가 육량지수와는 음의 상관을 나타내었다.

Relationship of Slaughter Age and Carcass Traits of Hanwoo Cattle

  • Panjono, Panjono;Kang, Sun-Moon;Lee, Ik-Sun;Kim, Yeong-Jong;Lee, Sung-Ki
    • 한국축산식품학회지
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    • 제29권5호
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    • pp.550-556
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    • 2009
  • Two experiments were carried out to investigate the relationship of slaughter age and carcass traits of Hanwoo cattle. A total number of 11,284 heads of cattle (4,624 bulls, 6,120 steers, and 540 females) were used in the experiment (Exp.) 1. In the Exp. 2, 3,887 heads of steers slaughtered at age of 24-36 mon were used. After 24 h post-slaughter chilling, the carcasses were weighed and evaluated by an official grader of carcass traits according to the Korean carcass grading standard. Backfat thickness was the main variable in yield index and grade whereas marbling score was the main variable in carcass quality grade. Meat color was an important factor affecting carcass quality grade of bulls; fat color was an important factor affecting those of steers and females; and maturity was an important factor affecting that of females. After 24-mon-old, extension of slaughter age did not automatically increase the quantity and quality of meat. However, 29 mon of age can be regarded as the optimum time to slaughter steers to attain the highest take home money for farmers.

아연, 비타민과 셀레늄의 첨가가 홀스타인 거세우의 발육, 도체특성 및 경제성에 미치는 영향 (Effects of zinc, vitamin and selenium additives for improving meat quality on the growth performance, carcass characteristics and economic efficiency of holstein steers)

  • 조원모;이상민
    • 농업과학연구
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    • 제42권3호
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    • pp.253-259
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    • 2015
  • This study was conducted to investigate the effect of different additives on the growth performance, feed efficiency and carcass characteristics in Holstein steers during 18month fattening periods. Twenty four Holstein steers, 5months of age and 176.6kg, were randomly allocated to 3 experimental groups 8 animals each for 18-months feeding trial. The groups were control (not additive), T1 (fed zinc, Vitamin C) and T2 (fed zinc, Vitamin C, Vitamin B6 and Selenium). According to feeding additives, final weight was not significantly different among the treatment groups, tended to be high at T2 group (827kg) compared to the other groups. Average daily gain was not different among the treatment groups during the experimental periods, but T2 group was significantly greater than T1 group in growing stage (p<0.05). The feed additives had no effects on DMI during experimental periods. Feed conversion ratio of T1 group in growing stage was significantly higher than those of other groups (p<0.05), average feed conversion ratio was tend to be decreased at T2 group rather compared with other groups. In the results of yield traits, carcass weight were relatively higher in T2 group than other groups (p<0.05). Rib-eye area, back fat thickness and yield index were similar between groups. In quality traits, marbling, meat color, fat color, texture and maturity were not significantly different among the groups. In economic efficiency, income was highest at T2 group as 91~393 thousand won among 3 groups.

Genetic Parameter Estimates of Carcass Traits under National Scale Breeding Scheme for Beef Cattle

  • Do, ChangHee;Park, ByungHo;Kim, SiDong;Choi, TaeJung;Yang, BohSuk;Park, SuBong;Song, HyungJun
    • Asian-Australasian Journal of Animal Sciences
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    • 제29권8호
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    • pp.1083-1094
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    • 2016
  • Carcass and price traits of 72,969 Hanwoo cows, bulls and steers aged 16 to 80 months at slaughter collected from 2002 to 2013 at 75 beef packing plants in Korea were analyzed to determine heritability, correlation and breeding value using the Multi-Trait restricted maximum likelihood (REML) animal model procedure. The traits included carcass measurements, scores and grades at 24 h postmortem and bid prices at auction. Relatively high heritability was found for maturity ($0.41{\pm}0.031$), while moderate heritability estimates were obtained for backfat thickness ($0.20{\pm}0.018$), longissimus muscle (LM) area ($0.23{\pm}0.020$), carcass weight ($0.28{\pm}0.019$), yield index ($0.20{\pm}0.018$), yield grade ($0.16{\pm}0.017$), marbling ($0.28{\pm}0.021$), texture ($0.14{\pm}0.016$), quality grade ($0.26{\pm}0.016$) and price/kg ($0.24{\pm}0.025$). Relatively low heritability estimates were observed for meat color ($0.06{\pm}0.013$) and fat color ($0.06{\pm}0.012$). Heritability estimates for most traits were lower than those in the literature. Genetic correlations of carcass measurements with characteristic scores or quality grade of carcass ranged from -0.27 to +0.21. Genetic correlations of yield grade with backfat thickness, LM area and carcass weight were 0.91, -0.43, and -0.09, respectively. Genetic correlations of quality grade with scores of marbling, meat color, fat color and texture were -0.99, 0.48, 0.47, and 0.98, respectively. Genetic correlations of price/kg with LM area, carcass weight, marbling, meat color, texture and maturity were 0.57, 0.64, 0.76, -0.41, -0.79, and -0.42, respectively. Genetic correlations of carcass price with LM area, carcass weight, marbling and texture were 0.61, 0.57, 0.64, and -0.73, respectively, with standard errors ranging from ${\pm}0.047$ to ${\pm}0.058$. The mean carcass weight breeding values increased by more than 8 kg, whereas the mean marbling scores decreased by approximately 0.2 from 2000 through 2009. Overall, the results suggest that genetic improvement of productivity and carcass quality could be obtained under the national scale breeding scheme of Korea for Hanwoo and that continuous efforts to improve the breeding scheme should be made to increase genetic progress.

육성비육 거세한우에 대한 황토 급여가 성장 및 도체특성에 미치는 효과 (Effect of Red clay(Hwangto) on Growth Performance and Carcass Characteristics in Growing-Fattening Hanwoo Steers)

  • 강수원;김준식;조원모;정하연;기광석;최성복
    • Journal of Animal Science and Technology
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    • 제44권3호
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    • pp.315-326
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    • 2002
  • 육성비육우에 대한 황토급여 효과 구명을 위하여 거세한우 송아지 10두(평균체중 : 144.7kg)를 대상으로 황토급여 유무에 따른 2개 처리(T1 : 황토 무급여, T2 : 황토 자유채식) 와 황토급여 수준에 따른 4개 처리(T3 : 황토 무급여, T4 : 황토 2% 첨가, T5 : 황토 5% 첨가, T6 : 황토 자유채식)를 두어 6개월령부터 24개월령까지 540일간 사양시험을 실시한 결과를 요약하면 다음과 같다. 시험 1에서, 일당증체량은 육성기 및 비육후기에는 황토 무급여구가, 비육전기에는 황토 자유채식구가 우수하였으나 전기간 동안에는 황토급여 유무에 따른 차이가 없었고, 1kg 증체당 소요된 농후사료 및 TDN량도 황토급여 유무에 따른 뚜렷한 차이는 없었다. 도체조사 결과, 도체율, 정육율 및 거래정육율은 황토급여 유무에 따른 뚜렷한 차이가 없었으나 육량지수, 전단력 및 관능검사의 각 항목 등은 황토급여시 개선되는 경향이었다. 그 밖에 경제성분석결과 처리구별 소득은 처리구간에 따른 뚜렷한 차이는 없었다. 시험 2에서, 일당증체량은 육성기에는 황토 무급여구가, 비육전기에는 황토 5%구가 그리고 비육후기에는 황토 자유채식구가 우수하였으나 전기간에는 황토급여 수준에 따른 뚜렷한 차이가 없었으나, 1kg 증체당 소요된 농후사료 및 TDN량 관행사육구에 비해 황토 급여구에서 각각 4.5-8.3% 및 1.2-1.6% 적게 소요되었다. 도체조사 결과 등지방두께, 배최장근단면적 및 육량지수는 황토급여 수준에 따른 뚜렷한 차이가 없었지만, 근내지방도는 황토 5% 및 자유채식구에서 높은 것으로 나타났고, 황토를 자유채식시 관행사육에 비해 소득이 15.5% 증가하는 것으로 나타났다. 이상과 같은 결과를 요약해 볼 때 거세한우 비육우에 대해 가공하지 않은 황토 급여시 육량 및 사료이용성에는 뚜렷한 효과가 없는 반면 육질개선에는 다소 영향을 미치는 것으로 나타났다. 따라서 황토급여시에는 비육후기에 자유채식의 형태로 급여하되, 이용성 증대를 위해 미세입자로 하거나 지장수 형태로 급여하는 것이 바람직 할 것으로 판단된다.

Effects of a Stair-step Growth Pattern on Improvements in Meat Quality and Growth in Hanwoo Steers

  • Li, Z.H.;Lee, H.G.;Xu, C.X.;Hong, Z.S.;Jin, Y.C.;Yin, J.L.;Zhang, Q.K.;Piao, D.C.;Yang, U.M.;Choi, Y.J.
    • Asian-Australasian Journal of Animal Sciences
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    • 제23권11호
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    • pp.1427-1435
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    • 2010
  • The present study was conducted to examine the effect of a stair-stepped feed intake pattern on growth, feed efficiency, and meat quality of Hanwoo steers. Twenty-seven 11-month-old Hanwoo steers were randomly divided into three groups. The control group was fed according to the Korean steer feeding program, and the other two groups were fed according to an alternated feeding schedule of 3-2-4-2 months. During the first three months of the experiment, treatment group 1 (T1) and treatment group 2 (T2) were fed 20% and 30% less than the control group, respectively. For the following two months, the T1 group was fed 20% more than the control group while the T2 group was fed 20% less than the control group. In the third step, T1 and T2 groups were fed 20% and 10% less, respectively, than the control group for four months. In the last two months, T1 and T2 groups were fed 20% more than the control group. After the stair-step feeding trial, steers were fed concentrated feed ad libitum for five months. The altered feed intake pattern did not affect daily body weight gain. However, daily feed intake tended to decrease and growth efficiency tended to increase in the two treatment groups compared to the control group. Altered feed intake also affected blood metabolite levels. The serum glucose and BUN level of the T1 group increased in the first re-fed period compared to the T2 and control groups. The serum cholesterol level of the T2 group decreased in the first restricted-re-fed growth period compared to the T1 and control groups. The serum NEFA levels of the two treatment groups increased from the first restricted period compared to the controls. The serum insulin level of the T2 group increased in the last period compared to the T1 and control groups. Regarding meat yield index, the control group was significantly higher than the T2 group (p<0.05). Regarding meat yield grade, the carcass back fat thickness of the T2 group was significantly higher than the control group (p<0.05). In marbling score, the T1 group was the highest (4.9), followed by the control group (4.1) and the T2 group (4.0). These results indicate that using a stair-stepped growth pattern (T1) can contribute to improvements in growth efficiency and muscle marbling.

Model for Estimating CO2 Concentration in Package Headspace of Microbiologically Perishable Food

  • Lee, Dong-Sun;Kim, Hwan-Ki;An, Duck-Soon;Yam, Kit L.
    • Preventive Nutrition and Food Science
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    • 제16권4호
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    • pp.364-369
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    • 2011
  • Levels of carbon dioxide gas, a metabolite of microbial growth, have been reported to parallel the onset of microbial spoilage and may be used as a convenient index for a packaged food's shelf life. This study aimed to establish a kinetic model of $CO_2$ production from perishable food for the potential use for shelf life control in the food supply chain. Aerobic bacterial count and package $CO_2$ concentration were measured during the storage of seasoned pork meat at four temperatures (0, 5, 10 and $15^{\circ}C$), and their interrelationship was investigated to establish a mathematical model. The microbial growth at constant temperature was described by using model of Baranyi and Roberts. $CO_2$ production from the stored food could be explained by taking care of its yield and maintenance factors linked to the microbial growth. By establishing the temperature dependence of the microbial growth and $CO_2$ yield factor, $CO_2$ partial pressure or concentration in package headspace could be estimated to a limited extent, which is helpful for controlling the shelf life under constant and dynamic temperature conditions. Application and efficacy of the model needs to be improved with further refinement in the model.

사료의 형태가 한우 거세우의 사료효율 및 도체성적에 미치는 영향 (Effect of Feed Type on Feed Efficiency and Carcass Characteristics of Hanwoo Steers)

  • 이귀예;조웅기;문여황
    • 농업생명과학연구
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    • 제45권4호
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    • pp.95-103
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    • 2011
  • 본 연구는 한우 거세우 95두 (평균체중 226 kg)를 이용하여 농후사료와 조사료 분리급여구, TMR구 그리고 TMR을 발효시킨 F-TMR구로 나누어 22개월동안 사육하여 도축하였을 때, 사료효율, 도체성적 및 경제성분석에 미치는 영향을 조사하기 위하여 실시되었다. 건물 및 TDN 섭취량은 육 비육 각 단계별로 F-TMR구에서 가장 많았다 (p<0.05). F-TMR구의 경우, 일일증체량은 육성기에는 처리구중 가장 적었으나, 비육후기에는 타 처리구에 비해 약 48%나 높았다 (p<0.05), 사료효율은 전 육성비육기간 동안 비슷한 수준으로 유지되었다. 도체중과 배최장근단면적에서는 F-TMR 급여구에서 가장 높았으나 (p<0.05), 등지방두께가 가장 얇았던 (p<0.05) 분리급여구에서 육량지수와 육량 A등급 비율이 높았다. F-TMR구의 근내지방도가 타구에 비해 현저히 (p<0.05) 증가되어 육질 1+등급이상 출현율이 96%에 달하였다. 경제성 분석에서 사료비는 F-TMR구가 분리급여구에 비해 40%가 증가되었으나 증체량과 육질등급의 향상으로 인하여 순수익은 29%나 증가되었다.