• Asian-Australasian Journal of Animal Sciences
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• 제27권4호
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• pp.503-510
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• 2014

The study was conducted to determine the effect of feeding diets containing Andrographis paniculata leaves (APL), whole Andrographis paniculata plant (APWP) and a control without Andrographis paniculata (AP0), on growth performance, carcass characteristics and meat yield of 24 intact Boer bucks. The results obtained indicated that inclusion of Andrographis paniculata significantly improved feed intake, weight gain, feed efficiency and live weight. The ratios of carcass to fat, lean to bone, lean to fat, and composition of meat were also improved. In addition, there were significant differences (p<0.05) between the dietary treatments in dressing percentage and chilling loss. Goats fed on AP0 (control) had significantly higher proportions of fat and bone, as well as thicker back fat than the supplemented animals (APL and APWP). Higher gut fill in animals fed Andrographis paniculata suggested slow rate of digestion, which could have improved utilization and absorption of nutrients by the animals. Goats fed Andrographis paniculata also produced higher meat yield and relatively lower fat contents (p<0.05).

• Animal Bioscience
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• 제37권2호
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• pp.315-322
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• 2024

Objective: The aim of this study was to evaluate the effect of pre-slaughter fasting time on carcass yield, meat quality, blood parameters and glucose metabolism in broilers. Methods: Four hundred and fifty Arbor Acres (AA) broilers at 42 days of age were divided into 5 groups with 6 replicates in each group and 15 chickens as one replicate. Following this period, broilers from each group were distributed among five groups according to preslaughter fasting period as 4, 8, 12, 16, or 20 h. Results: With increasing fasting time, the carcass yield (p<0.01), the breast muscles yield (p<0.01) and the thigh yield (p<0.01) of the broilers were all linearly increased. With increasing fasting time, the L^* values (p<0.01), cooking loss (p = 0.020), moisture content (p<0.01) in the leg muscles linearly downregulated, while the drip loss (p = 0.043), pH_{45 min} (p<0.01) and pH_{24 h} (p<0.01) were linearly upregulated. A trend for a lower (p = 0.071) shear force in the leg muscles was also observed in broilers fasted for longer time. Similar results were also found in breast muscles. The different fasting treatments did not influence the breast muscles glycogen content (p>0.10), while the increase of fasting time resulted in a linear decrease of the blood glucose (p = 0.021) and, more specifically, the glycogen content of the liver and leg muscles (p<0.001). With increasing fasting time, the aspartate transaminase (p<0.01), uric acid (p<0.01), and triglycerides (p<0.01) in serum linearly downregulated, while the alanine aminotransferase was linearly upregulated. Conclusion: The results of this study show a significant influence of fasting time on carcass yield and meat quality in broilers. Moderate fasting (8 to 12 h) before slaughter can reduce the weight loss of broilers. Prolonged fasting (≥16 h) increased body weight loss, decreased slaughtering performance and fluctuating blood indexes of broilers.

• 농업과학연구
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• 제38권2호
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• pp.263-268
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• 2011

This experiment was conducted to investigate the effect of feeding TMR with or without Yukmijihwangtang meal silage on the growth performance, meat yield and quality of Hanwoo steers. Sixteen male Hanwoo steers in the late fattening period were randomly assigned to a control diet and Yukmijihwangtang meal diet, with eight heads per treatment. The supplementation of Yukmijihwangtang meal silage did not affect the feed conversion rate, ribeye area, and meat yield index of cold carcass of Hanwoo. Fat thickness of Hanwoo s loin obtained from silage supplementation was significantly lower than that of non-supplemented. Total grade in meat yield of Hanwoo from silage supplementation were higher than that of non-supplemented control. The supplementation of Yukmijihwangtang meal silage to Hanwoo decreased the marbling score significantly, but did not affect fat color, firmness, and maturity. Total grade of meat quality of Hanwoo with Yukmijihwangtang meal supplementation was lower than that of non-supplemented control. In conclusion, Yukmijihwangtang meal could be used as partial substitution (10%) in TMR for fattening cattle. However, it is considered that Yukmijihwangtang meal can be a useful feed for the periods of growing or early fattening than that of late fattening since it improved meat yield but decreased meat quality grade of Hanwoo steers.

• 한국가금학회지
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• 제48권2호
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• pp.59-67
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• 2021

This study investigated the morphological features, growth, and meat yield performance of Pekin (P), Nageswari (N), and their reciprocal F₁ crossbreds (P♂×N♀ and N♂×P♀). A total of 301-day-old ducklings were reared in four different pens up to 20 weeks of age under intensive management conditions. Feeding and management practices were similar for all individuals throughout the experimental period. The morphology and plumage pattern of F₁ crossbreds were similar to those of indigenous Nageswari ducks because of the dominant inheritance of the extended Black allele (E locus). Genotype had significant differences (P<0.05) among the four genotypes in morphometric measurements, except wing and shank length. Growth performance was highly significant among the four genotypes (P<0.001) from one-day to 12 weeks of age. The average live weights of P, N, P♂×N♀ and N♂×P♀ crossbred genotypes at 12 weeks of age were 2038.35±29.74, 1542.44±33.61, 1851.85±28.59 and 1691.08±27.80 g, respectively. Meat yield parameters varied significantly (P<0.05) among the different genotypes for all studied traits, except for liver and gizzard weight. Moreover, no significant differences (P>0.05) were observed between P and P♂×N♀ crossbred for important meat yield traits such as hot carcass weight, dressing%, back half weight, drumstick with thigh weight and breast meat weight. Remarkably, the P♂×N♀ crossbreed possesses 50% native inheritance, which contributes to better adaptation in a hot-humid environment. Our results revealed that the P♂×N♀ genotype could be suitable for higher meat production with better adaptability in the agro-climatic conditions of Bangladesh.

• Asian-Australasian Journal of Animal Sciences
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• 제22권10호
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• pp.1386-1390
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• 2009

A dose-response experiment with five lysine levels (0.65, 0.80, 0.95, 1.10, and 1.25%) was conducted to evaluate the lysine requirement of male White Pekin ducklings from 7 to 21 days of age. Two hundred and eighty, 7-day-old, male White Pekin ducklings were allocated to 5 experimental treatments, each containing 8 replicate pens with 7 birds per pen. Feed and water were provided ad libitum from 7 to 21 days of age. At 21 days of age, weight gain, feed intake, feed/gain, breast meat weight, and breast meat yield relative to body weight of ducklings from each pen were all measured. As dietary lysine level increased, weight gain, feed intake, feed/gain, breast meat weight, and breast meat yield of ducklings were all improved significantly (p<0.05). According to broken-line regression analysis, the lysine requirement of male White Pekin ducklings from 7 to 21 days of age for weight gain, feed/gain, breast meat weight, and breast meat yield was 0.84, 0.90, 0.97, and 0.98%, respectively. Considering that Pekin duck production is directed to meat production, the lysine requirement of male starter Pekin ducklings during this period is suggested to be 0.98%.

• Asian-Australasian Journal of Animal Sciences
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• 제24권10호
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• pp.1407-1416
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• 2011

The objective of this study was to determine the effect of genotype (slower-growing vs. fast-growing) and production system (access to outdoors vs. indoor) on the growth performance, carcass yield and meat quality (chemical composition, physicochemical and sensory properties) of chickens. The experiment was performed on 1,040 day-old hybrid male chickens of two genotypes. Slower-growing chickens (Hubbard JA957, certified) and fast-growing chickens (Hubbard F15) were fed identical diets until 65 days of age. Both genotypes (each represented by 520 birds) were divided into two subgroups and were raised in pens on litter with outdoor access or in indoor confinement without outdoor access (four replications per subgroup, each of 65 birds). Until day 21, the birds stayed in the indoor facility, in deep-litter pens. The birds could forage on pasture 12 h daily, commencing at three weeks of age. Stocking density was 0.13 $m^2$ floor space per bird in pens on litter, and 0.8 $m^2$ per bird in grassy yards. Compared with fast-growing, slower-growing chickens were significantly lighter (by 17%), had a lower breast and thigh muscle yield and a higher abdominal fat content, but they were characterized by higher survival rates at 65 days, a higher protein content and a lower fat content of breast meat. Outdoor access had no negative effects on the growth performance, muscle yield, the fatty acid profile and oxidative status of meat lipids. The meat of free-range chickens was darker in color, it had a higher protein content and a better water-holding capacity, but it was less juicy than the meat of birds raised indoors.

• 한국식품저장유통학회지
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• 제9권4호
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• pp.396-399
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• 2002

An attempt was made in this study to investigate the optimum extracting time from meat with bone of goat and the nutritional component of its extract. for the trials, the mixtures of meat with bone and water were adjusted to the ratios of five to four by weight and extracted for 6, 9 and 12 hours at 120$\^{C}$ under autoclave. Judging from the content of mineral and amino acid, nonenzymatic browning and yield, the optimum extracting time was 9 hours. The major components of mineral were composed of 47.7mg％ potassium, 12.7mg% calcium, 150.0mg% sodium, 105.3mg% phosphorus and 0.5mg% iron, and of amino acids composed of 1,308.0mg% glutamic acid, 1,464.2mg% glycine, 750.2mg% alanine and 828.lmg% proline in extract. The yield of extract was 32.1 percentage by dry basis.

• 한국축산식품학회지
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• 제23권1호
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• pp.21-27
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• 2003

본 연구는 간장이 첨가된 돈육을 텀블링 및 침지 처리하여 염지하는 동안의 품질특성 변화를 조사하기 위하여 실시하였다. 침지한 처리구는 간장용액을 첨가 후 1$^{\circ}C$의 냉장상태에서 10분, 20분, 30분, 24시간, 48시간 경과한 후, 텀블링 처리구는 10분, 20분, 30분간 연속식으로 텀블링한 후 실험을 실시하였으며, 텀블링한 시료의 일부는 24시간 및 48시간 동안 냉장저장 후 pH, 육색, 제품수율, 가열수율, 보수력, 연도, 관능검사를 실시하였다. 가열전 텀블링 처리구와 침지 처리구의 pH는 차이가 없었으며, L-값은 가열 전.후 24시간 및 48시간 경과한 염지육에서 침지 처리구가 텀블링 처리구보다 낮은 값을 보였다. 제품 수율은 두 처리구 모두 염지 시간이 경과함에 따라 증가하였으며, 텀블링 처리구가 침지 처리구보다 높은 수율을 보였다. 또한 가열 수율도 텀블링 처리구가 침지 처리구보다 높게 나타났다. 텀블링 처리구의 보수력과 전단력은 텀블링 시간이 증가함에 따라 상승하였으며, 텀블링 처리구가 침지 처리구보다 연도상승 효과가 있었다. 관능평가에서 조직감, 다즙성, 전체적 기호도에서 텀블링한 처리구가 보다 높은 점수를 받았으나, 색, 풍미, 조직감, 다즙성, 짠맛, 전체적 기호도 항목에서 두 처리구간 염지시간에 따른 차이는 나타나지 않았다. 이상의 결과에서 텀블링 처리는 기존의 침지 처리에 비해 제품수율, 가열수율, 연도를 향상시킬 수 있었고, 30분 텀블링 후 24시간과 48시간의 지연시간이 경과한 경우에도 48시간 동안의 침지처리보다 우수한 제품을 제조할 수 있었다. 하지만 본 실험의 결과로 나타내지 않았으나 30분 이상 텀블링을 실시해 본 결과 시료의 일부가 찢겨지는 등의 문제가 발생되어 30분 이내에서의 텀블링이 유효할 것으로 판단된다.

• Asian-Australasian Journal of Animal Sciences
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• 제33권7호
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• pp.1202-1208
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• 2020

Objective: The aim of this study was to identify a distribution pattern of meat quality grade (MQG) as a function of carcass yield index (CYI) and the gender of Hanwoo (bull, cow, and steer) to determine the optimum point between both yield and quality. We also attempted to identify how pre- and post-deboning variables affect the gender-specific beef quality of Hanwoo. Methods: A total of 31 deboning variables, consisting of 7 pre-deboning and 24 post-deboning variables from bulls (n = 139), cows (n = 69), and steers (n = 153), were obtained from the National Institute of Animal Science (NIAS) in South Korea. The database was reconstructed to be suitable for a statistical significance test between the CYI and the MQG as well as classification of meat quality. Discriminant function analysis was used for classifying MQG using the deboning parameters of Hanwoo by gender. Results: The means of CYI according to 1+, 1, 2, and 3 of MQG were 68.64±2.02, 68.85±1.94, 68.62±5.88, and 70.99±3.32, respectively. High carcass yield correlated with low-quality grade, while high-quality meat most frequently was obtained from steers. The classification ability of pre-deboning parameters was higher than that of post-deboning parameters. Moisture and the shear force were the common significant parameters in all discriminant functions having a classification accuracy of 80.6%, 71%, and 56.9% for the bull, cow, and steer, respectively. Conclusion: This study provides basic information for predicting the meat quality by gender using pre-deboning variables consistent with the actual grading index.

• 한국축산식품학회지
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• 제18권4호
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• pp.307-315
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• 1998

To develop processed meat products of pheasant, cut-up parts of pheasant carcass was analyzed, and eight different pheasant meat products were prepared and evaluated for sensory qualities. The average live weight of pheasant was 1,089.2g, and the ratio of carcass to live weight was 75.6%. The cut-up part ratios of breast, leg, neck, back and wings to carcass weight were 33.4%, 22.5%, 5.0%, 4% and 9.5%, respectively. The chemical compositions of breast and leg meat were shown to be moisture of 73.72% and 75.58%, protein of 25.31% and 22.69%, fat of 0.28% and 0.83%, and ash of 0.84% and 0.90%, respectively. Sensory evaluation of eight different meat products of pheasant revealed that all products of pheasant meat, except frankfurt sausage, received equal or better taste score compared with products of chicken or pork, and flavor score except pressed ham and salad. Color, binding ability and particle perception scores of pheasant meat products were equal or superior to those of respective meat products of chicken or pork. The present results suggest that pheasant meat has a potential to be utilized for various value-added products and that the meat bun is the most promising product of pheasant meat. A reinforcement of color, binding ability and particle perception of meat products of other species could also be expected by addition of pheasant meat to them.