• 한국가금학회지
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• 제26권1호
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• pp.1-25
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• 1999

Concerns about meat quality, including chicken meat, for the human diet has led to many attempts to manipulate the carcass fat and increase the eating quality. For actual eating quality, the birds must be grown and finished in a manner that results in meat that are tender, succulent and of good flavor, as well as being free from any foreign taint, flavor or safety hazard. Tenderization treatment with high voltage(820V) electrical stimulation and prechill muscle tensioning would improve the tenderness of chicken meat. Proper programs for the withdrawal of feed and water require a team approach for maximizing yield of meat and minimizing carcass contamination. Also effding of supplemental levels of-tocopherol to poultry with vegetable or fish oils increases of desirable polyunsaturated fatty acid(PUFA) content and stablizes the meat against rancidity and fish off-flavors. The nutritional effects of varying dietary ingredients on broiler carcass fat content are also important. Increasing the levels of energy in the ration increases the carcass fat content, while increasing the proteing levels decreases carcass fat content. Supplement-tation of poultry diets with amino acids such as methionine, lysine, glycine and tryptophan as well as amino acid such as well as amino acid mixtures can reduce body fat deposition. Normal stress leads to chicken muscular damage resulting in reduced meat quality, but this can be controlled by preslaughter management practices. Feed manufactures can utilize ntilize nutrient modulation to control pale soft exudative(PSE)syndrome. Finally, the success in poultry meat production depends on the consistent achievement of carefully selected levels of quality. Quality assurance should be the wider function of incorporating quality into the production system and the combination of motivating quality into actions and operations.

• Asian-Australasian Journal of Animal Sciences
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• 제5권2호
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• pp.237-248
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• 1992

The effect of 16 different dietary rations, computed by the combinations of 13, 16, 19 or 22% CP and 2600, 2800, 3000 or 3100 kcal ME/kg, on growth performances and carcass yield of Starcross layers were assessed in two similar experiments. In both experiments, the body weight, eviscerated carcass yield, edible carcass yield, length of digestive tract and shank length increased but the feed intake decreased linearly with the increase of dietary CP and ME levels. The liver and gizzard weights as percentages of live weight tended to be increased with the increase of dietary CP and ME levels. The carcass dry matter, crude protein, fat, ash and energy content were not influenced by the dietary CP and ME levels. Dietary CP levels had positive correlations with all the parameters (except feed and energy intake and carcass dry matter). However, the dietary ME levels were positively correlated with all the parameters (except feed and energy intake; carcass dry matter and ash) in both experiments. The higher values were noted for all the parameters (except gizzard and carcass fat percentages) studied in Experiment 1 compared to those observed in Experiment 2.

• Asian-Australasian Journal of Animal Sciences
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• 제14권8호
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• pp.1133-1137
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• 2001

An experiment was conducted to study the performance and carcass characteristics of Hanwoo steers fed whole crop corn silage ensiled with poultry manure (PM) for 18 months. The experiment was designed as a randomized block design with three phases. Steers were allotted in one of three dietary treatments, which were ammonia-treated rice straw (AS), whole crop corn silage (CS) and whole crop corn+30% PM silage (based on DM; MS). All diets were supplemented with concentrate. Total body weight gain and average daily gain (ADG) in MS group were increased (p<0.05) by 6% over AS group. The MS treatment enhanced (p<0.05) total and daily intakes of forage compared with the AS and CS treatments while there was compensatory effect on concentrate intake by AS group. Carcass characteristics were improved by feeding MS. MS increased (p<0.05) carcass weight and marbling score (7.5 and 22.5% of AS, respectively), and reduced (p<0.05) backfat thickness (13.2 of AS and 16.6% CS). Carcass grade and meat quality grade were also improved by MS compared with AS and CS. Under the conditions of this study, MS was an efficacious replacement for corn silage for steers.

• Asian-Australasian Journal of Animal Sciences
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• 제23권7호
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• pp.867-872
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• 2010

A comprehensive study was undertaken to evaluate the effect of naked neck (Na) gene on immune competence, serum biochemical parameters and carcass quality traits in three genotypes (NaNa, Nana and nana) of the naked neck chicken under a tropical climate (Southern India). Sixty day-old chicks (20 from each genotype) were selected randomly and reared under similar environmental conditions up to eight weeks of age. The cell mediated immune (CMI) response to phytohaemoagglutinin-P (PHA-P) was significantly higher ($p{\lgq}0.01$) in NaNa and Nana genotypes compared to nana birds. The humoral response as measured by antibody titre to sheep red blood cells (SRBC) was also significantly higher in NaNa. The total cholesterol, LDL and VLDL cholesterol levels were significantly ($p{\leq}0.01$) lower whereas HDL cholesterol level was significantly higher in NaNa and Nana compared to nana genotype. The presence of Na allele significantly increased the live weight and dressing yield, and decreased the feather cover and abdominal fat. The naked neck genotypes (NaNa/Nana) performed better than the normal (nana) siblings for almost all the traits studied.

• 한국축산시설환경학회지
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• 제17권2호
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• pp.81-92
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• 2011

본 연구에서는 감염가금을 친환경적으로 신속히 처리하기 위하여 가금류를 안락사, 수거 등 전처리와 폐사축 살균처리 요인시험을 통해 구명된 결과를 토대로 전처리 및 폐사축 처리시스템을 설계 제작하여 성능시험을 실시한 결과는 다음과 같다. 1. 전처리 요인 구명을 위하여 안락사, 페사가축 수거시험 결과 안락사는 챔버 내에서 축종 및 분당 가스투입비율별로 시험결과 단시간 내에 처리가 가능한 것으로 나타났으며, 가금 사체수거는 트랙터 로더에 부착이용 할 수 있는 수거, 배출 일관형 수거장치가 1회에 닭 80수/회 까지 수거운반이 가능하였으나, 수거량 증대 및 작업시야 확보 등 개선이 요구되었다. 2. 저전염성 AI, ND를 공시하여 멸균조건구명 시험결과 살균온도 $120^{\circ}C$ 에서 10분 처리시 멸균되는 것으로 나타났다. 3. 증기살균 요인 구명을 위하여 파쇄, 교반과 동시에 살균이 가능한 간접가열방식 소형 폐사가축 살균시험장치 (살균조 용량 : 0.75 $m^3$)를 제작하여 시험한 결과 닭, 오리는 30분, 돼지는 60분 처리 시 살균이 가능하였으며, 중량도 12.4~34.4% 정도 감소되며 폐액도 발생되지 않는 것으로 나타났다. 따라서 소형 폐사축 살균장치를 이용하여 닭, 돼지 등 사육농가에서 발생하는 일반 폐사가축을 처리하여 퇴비 및 사료화에 이용가능 할 것으로 판단되었다. 4. 요인시험 결과를 토대로 감염가금 전처리 및 폐사가축 처리시스템을 설계제작 하였다. 전처리 및 폐사가축 처리 작업체계는 평사에 사육하는 육계의 경우 비닐텐트 내에 $CO_2$ 가스를 투입하여 안락사 시킨 후 트랙터용 수거, 배출 일관형 가금사체 수거장치를 이용 폐사축을 수거 운반하여 트럭 탑재형 이동식 폐사가축 처리시스템 (용량 : 6.3 $m^3$)에 투입하면 파쇄, 교반과 동시에 간접스팀 살균하여 배출할 수 있으며, 살균작업이 끝나면 고온고압의 세척장치가 부착되어 세척 소독할 수 있도록 전처리 및 폐사가축 처리시스템을 설계제작 하였다. 5. 닭 1천수를 공시하여 전처리 및 폐사축 살균처리 성능시험결과 안락사는 비닐텐트(10 $m^3$)를 설치하여 인력몰이 한 후 $CO_2$ 가스를 분당 300L 투입하여 안락사에 이르는데 9.7분 소요되었으며, 비닐텐트 설치와 인력몰이를 합하면 3인 작업에 총 30.2분 소요되는 것으로 나타났다. 가금사체 수거는 트랙터 부착형 가금사체 수거장치를 이용 1회 평균 142수 수거가 가능하며, 총 작업소요시간은 21.2분 소요되는 것으로 나타났다. 폐사가축을 파쇄 교반과 동시에 간접살균방식의 이동식 폐사축 처리장치의 살균처리성능은 60분으로 능률적이었으며, 살균 후 중량 21.1%, 부피 31.9%가 감소되고 폐액발생이 없는 것으로 나타났다. 또한 이동식 폐사가축 처리장치에는 고온고압 세척장치가 부착되어 있어 작업이 끝나면 기체를 세척소독 할 수 있어 친환경처리가 가능한 것으로 판단되었다.

• 한국미생물·생명공학회지
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• 제51권3호
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• pp.314-316
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• 2023

Colistin is one of the last-resort antibiotics used to treat multidrug-resistant Gram-negative bacterial infection in both human and animals. Here, we report the complete genome sequence of colistin-resistant Salmonella enterica serotype Enteritidis strain CRSE-01 isolated from poultry carcass in South Korea. The assembled genome consists of a 4,783,907-bp circular chromosome containing numerous antimicrobial resistance genes and a 59,372-bp plasmid.

• Asian-Australasian Journal of Animal Sciences
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• 제22권7호
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• pp.1026-1031
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• 2009

An experiment was conducted to study the effect of graded levels of butyric acid (butyrate) on performance, gastrointestinal tract health and carcass characteristics in young broiler chickens. Control starter (0-3 wk) and finisher (4-5 wk) diets were formulated to contain 2,900 kcal ME/kg and 22% CP, and 3,000 kcal ME/kg and 20% CP, respectively. Subsequently, four other experimental diets were formulated to contain 0.05% antibiotic (furazolidone) or 0.2, 0.4 and 0.6% butyric acid. Each diet was fed at random to 8 replicates of 6 chicks each throughout the experimental period (0-5 wk). The results showed that 0.4% butyrate in the diet was similar to antibiotic in maintaining body weight gain and reducing E. coli numbers but superior for feed conversion ratio. No added advantage on these parameters was obtained by enhancing the concentration of butyrate from 0.4 to 0.6% in the diet. Feed intake and mortality were not influenced by the dietary treatments. A reduction in pH of the upper GI tract (crop, proventiculus and gizzard) was observed by inclusion of butyrate in the diets of broilers compared to either control or antibiotic-fed group. Butyrate at 0.4% was more effective in reducing the pH than 0.2% butyrate. Within the lower GI tract, 0.4 and 0.6% butyrate was effective in lowering pH in the duodenum, but no effect was found in either the jejunum or ileum. The villus length and crypt depth in the duodenum increased significantly in all the butyrate treated diets irrespective of the level tested. Carcass yield was higher and abdominal fat content was lower significantly in all the butyrate treatment groups compared to the control or antibiotic group. From these findings, it is concluded that 0.4% butyric acid supplementation maintained performance, intestinal tract health, and villi development and carcass quality in broiler chickens.

• Asian-Australasian Journal of Animal Sciences
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• 제24권4호
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• pp.509-516
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• 2011

The performance of naked neck and normal chicken was evaluated with respect to growth, carcass, immune, biochemical and stress parameters under winter and summer seasons to assess the suitability of naked neck birds under high temperatures in the global scenario of climate change. The growth performance was significantly ($p{\leq}0.05$) higher in naked neck chicken in the summer season. The dressing percentage was significantly ($p{\leq}0.05$) higher in naked neck birds in both winter and summer season because of reduced plumage. The thigh, giblet and feather proportion significantly ($p{\leq}0.05$) varied between naked neck and normal chickens in summer season. The humeral immune response to sheep red blood cells (SRBC), Newcastle disease vaccine (NDV) and cutaneous basophil hypersensitivity (CBH) did not show any significant differences among the chicken groups. The protein and cholesterol concentration observed was within the normal ranges. The total cholesterol levels in plasma were significantly ($p{\leq}0.05$) lower in naked neck birds in both the seasons. H:L ratio was significantly ($p{\leq}0.05$) lower in summer season indicating less stress in naked neck chicken. Basophil and eosinophil concentration was significantly ($p{\leq}0.05$) higher in normal chicken in summer. The lipid peroxidation was higher in full feathered birds under summer stress. The enzyme glutathione reductase (GR) levels were significantly higher during the summer and varied significantly ($p{\leq}0.05$) between the normal and naked neck chicken in both seasons. The results indicated that the naked neck birds performed significantly better at high ambient temperatures with respect to growth, carcass and biochemical parameters. It was concluded that the ability of the naked neck chicken to adapt to high temperatures foresees a viable option for the biological mitigation of climate change.

• Asian-Australasian Journal of Animal Sciences
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• 제27권7호
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• pp.1057-1068
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• 2014

The major goals of the poultry industry are to increase the carcass yield and to reduce carcass fatness, mainly the abdominal fat pad. The increase in poultry meat consumption has guided the selection process toward fast-growing broilers with a reduced feed conversion ratio. Intensive selection has led to great improvements in economic traits such as body weight gain, feed efficiency, and breast yield to meet the demands of consumers, but modern commercial chickens exhibit excessive fat accumulation in the abdomen area. However, dietary composition and feeding strategies may offer practical and efficient solutions for reducing body fat deposition in modern poultry strains. Thus, the regulation of lipid metabolism to reduce the abdominal fat content based on dietary composition and feeding strategy, as well as elucidating their effects on the key enzymes associated with lipid metabolism, could facilitate the production of lean meat and help to understand the fat-lowering effects of diet and different feeding strategies.

• 한국가금학회지
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• 제23권3호
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• pp.145-151
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• 1996

The origin and present status of research and commercial production of Korean Ogol chicken are reviewed. The Yeonsan Ogol chicken was designated as a National Monument (No.265) at April 1, 1980. After that, researches have been done on the various aspects of Ogol chicken, i.e., external characteristics, growth and reproductive performance, chemical composition of egg and meat, and carcass characteristics. In addition, several genetic parameters of Ogol chicken have been estimated.