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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Korean Journal of Poultry Science
Journal Basic Information
Journal DOI :
The Korean Society of Poultry Science
Editor in Chief :
Volume & Issues
Volume 39, Issue 4 - Dec 2012
Volume 39, Issue 3 - Sep 2012
Volume 39, Issue 2 - Jun 2012
Volume 39, Issue 1 - Mar 2012
Selecting the target year
Comparison of Cut Meat Yield from Two Different Breeds of Broilers in Korea
Lee, Hyun-Jung ; Lee, Se-Hyung ; Yang, Chang-Ho ; Lee, Jae-Cheong ; Jo, Cheo-Run ;
Korean Journal of Poultry Science, volume 39, issue 3, 2012, Pages 163~166
DOI : 10.5536/KJPS.2012.39.3.163
This study was carried out to compare the cut meat yields of Cobb and Avian and their profits at productive aspect. Two different breeds, Cobb (34,086,758 birds) and Avian (4,087,600 birds) produced from January 2009 to August 2009 were used. The whole chickens were divided into cut meats including tenderloins, breast fillets, whole wings, boneless thighs, and drumsticks. The growth performance and cut meat yield of Cobb and Avian were measured to investigate possible profit difference. Cobb was superior in the aspect of production performance to Avian with significant differences in survival rate and slaughtering age. As the weight gained, the yields of Cobb increased in breast fillets and boneless thighs as well as lean meat percentage. Significantly higher yield (%) of breast fillets was produced by Cobb at size 14 when compared with Avian. However, there was no significant difference in expected market prices for both cut meat and whole chicken meat between the two breeds in all sizes.
Effect of Dietary Metabolizable Energy and Crude Protein Concentrations on Growth Performance and Carcass Characteristics of Korean Native Ducks
Kim, Hong-Rae ; Kwon, Hyung-Joo ; Oh, Sung-Taek ; Yun, Jeong-Geun ; Choi, Young-In ; Choo, Yun-Kyung ; Kang, Bo-Seok ; Kim, Hak-Kyu ; Hong, Eui-Chul ; Kang, Chang-Won ; An, Byoung-Ki ;
Korean Journal of Poultry Science, volume 39, issue 3, 2012, Pages 167~175
DOI : 10.5536/KJPS.2012.39.3.167
This study was undertaken to assess dietary CP and ME concentrations for optimum growth performance and carcass characteristics of Korean Native male ducks. In a
factorial arrangement, 1-d-old Korean Native male ducks were completely randomized design to experimental diets with 3,000, 2,900, and 2,800 kcal of ME/kg of diet; each contained 23, 22, and 21% CP, respectively, from 0 to 3 wk of age. From 4 to 8 wk of age, experimental diets had 3,100, 3,000, and 2,900 kcal of ME/kg of diet, and each contained 19, 18, and 17% CP, respectively. Each dietary treatment was replicated 4 times, and feed and water were provided ad libitum. Body weight, feed intake and uniformity were measured at 3 wk and 8 wk, and carcass characteristics were evaluated at 8 wk. As CP increased from 21 to 23 %, the body weight, BW gain and feed conversion ratios (FCR) linearly improved (P<0.01) during 0 to 3 wk of age. From 4 to 8 wk of age, the body weight, feed intake, BW gain, FCR and uniformity were not different (P>0.05). Carcass ratios of birds fed 3,000 kcal of ME/kg diets from 3 to 8 wk of age were quadratically increased significantly (P<0.01). As ME and CP increased, respectively, relative weight of liver weight per 100 g of BW was linearly decreased (P<0.01). Relative weights of left breast, thigh and drumstick weight per 100 of BW were not different (P>0.05). Also, breast meat color, pH, cooking loss and shear force were not different (P>0.05). Thus, diets with 2,800 kcal of ME/kg and 23% CP or with 2,900 kcal of ME/kg and 17% CP at 0 to 3 wk and 4 to 8 wk, respectively, were used more efficiently. However, diets with 3,000 kcal of ME/kg at 4 to 8 wk in carcass rate was quadratically increased.
Performance of Growing Period of Two-way Crossbreed Parent Stock for Producing of Laying-Type Korean Native Commercial Chickens
Hong, Eui-Chul ; Choo, Hyo-Jun ; Kim, Hak-Kyu ; Kim, Chong-Dae ; Heo, Kang-Nyeong ; Lee, Myeong-Ji ; Son, Bo-Ram ; Suh, Ok-Suk ; Choi, Hee-Cheol ; Kang, Bo-Seok ;
Korean Journal of Poultry Science, volume 39, issue 3, 2012, Pages 177~182
DOI : 10.5536/KJPS.2012.39.3.177
This work was carried out to investigate the performance of growing period of two-way crossed of Korean native chickens parental stocks. A total of four hundred eighty female 2-crossbred chicks were used in this study and they were from National Institute of Animal Science. Groups were four crossbreds (4 replications/crossbred, 30 birds/replication) as A) C strain
Y strain, B) C strain
L strain, C) C strain
G strain and D) C strain
W strain. Body weight of A crossbred was the highest at the age of 8 week (P<0.05) and that of D strain was the lowest for growing period (P<0.05). Body weights of A and B crossbreds were higher than those of C and D crossbreds at the 12 and 16 weeks (P<0.05). Weekly body weights of A and B crossbreds were higher than C and D crossbreds (P<0.05), and weekly body weight of B crossbred was higher compared to other crossbreds at 0~20 weeks old. Weekly feed intake of D crossbred was the lowest among all crossbreds at 0~12, 0~16 and 0~20 weeks old (P<0.05). Weekly feed conversion ratio of C crossbred was the highest among crossbreds (P<0.05). These results can give the basic information for growth related data in 2-way crossbreed Korean Native Chickens, which can be used for the parental stocks for the laying-type of Korean native commercial chickens.
Effect of Electrolytic Material Feeding on Blood and Carcass Traits of Broiler under Intense Heat Condition in Summer
Chae, Hyun-Seok ; Choi, Hee-Chul ; Na, Jae-Cheon ; Kim, Min-Ji ; Kang, Hwan-Ku ; Kim, Dong-Wook ; Kim, Ji-Hyeok ; Jo, Soo-Hyun ; Lee, Chong-Eon ; Kim, Nam-Young ; Choi, Yang-Ho ; Park, Byong-Sung ;
Korean Journal of Poultry Science, volume 39, issue 3, 2012, Pages 183~193
DOI : 10.5536/KJPS.2012.39.3.183
This study was conducted to investigate the effect of feeding the electrolytic materials on blood and carcass traits of broiler during transportation exposed under intense heat condition in summer. The broilers were selected on the day when the outside temperature was about
to provide heat stressed environment. Broilers reared for 33 d were selected and fed with the electrolytic materials (
, NaCl, KCl) for 2 days. Treatments were as follows; feeding the underground water for control,
(1.0%) + NaCl (0.5%) for treament 1, KCl (0.5%) + NaCl (0.5%) for treatment 2, KCl (1.0%) + NaCl (0.5%) treatment 3, KCl (0.5%) +
(1.0%) + NaCl (0.5%) for treatment 4 and KCl (1.0%) +
(1.0%) + NaCl (0.5%) for treament 5. pH of chicken meat increased for treatments group of electrolytic material, especially, that of treatment 3 was highest when compared to the other treatments. The frequency rate (%) of
quality grade were 33.3, 60.0 and 83.3% at control, treatment 3, 4 and treatment 5, respectively. Occurrence rates of PSE were 50% for control and 13.3% for treatment 5. Corticosterone increased at the post-harvest period compared to the pre-harvest period of broiler and have small disparity between pre-and post-harvest only except treatment 3 when compared to control.
partial pressure of blood at the pre-harvest period was low in all treatments by heat stress, the disparity value of control was high for control, and those of treatment 4 and 5 were low compared to other treatments.
Growth Performance and Carcass Characteristics of Two Different Broiler Strains by Different Levels of Metabolizable Energy
Kim, Jong-Seol ; Kwon, Jung-Taek ; Kim, Je-Hun ; Oh, Sung-Taek ; Lee, Bo-Keun ; Zheng, Lan ; Jung, Moon-Sung ; An, Byoung-Ki ; Kang, Chang-Won ;
Korean Journal of Poultry Science, volume 39, issue 3, 2012, Pages 195~205
DOI : 10.5536/KJPS.2012.39.3.195
The objective of this study was to evaluate the effects of different levels of dietary ME on growth performance and carcass characteristics in two different strains of broiler chicken. A total of one thousand, 1-day-old A strain and R strain male chicks were randomly assigned into 8 treatments in a
factorial arrangement. They were fed iso-nitrogenic (CP 21%) crumbled diets formulated to contain metabolizable energy (ME) 2,950 to 3,250 kcal/kg in increment of 100 kcal/kg in the starter phase (1 to 21d) and iso-nitrogenic (CP 19%) pelleted diets containing same ME levels as in the finishing phase (22 to 38d). The body weight (BW) gain of chicks fed the lower ME diets (2,950 or 3,050 kcal/kg) were higher than those of the higher ME groups. The dietary energy level showed significant effects on feed intake and feed conversion rate (FCR) from 1 to 38 days of age (p<0.05). With the increment of dietary energy, feed intake tended to be reduced, whereas FCR was improved in the two strains of broiler chickens. The lowest FCR was observed at 3,250 kcal/kg diet groups in both of the two strains from 1 to 38 days of age. Feed intake and BW gain during 38 days were significantly affected by the strain factor. Increasing dietary energy up to 3,250 kcal/kg had no effect on the relative weights of breast meat and abdominal fat. The dietary energy and strains showed significant effects on the dressing percentage. There were no significant differences in various blood profiles except for GPT activity.
The Effects of Dietary Protein Level on Laying Performance and Egg Quality in Japanese Quail
Oh, Sung-Taek ; Kim, Je-Hun ; Park, Seung-Jae ; Yun, Jeong-Geun ; Zheng, Lan ; An, Byoung-Ki ; Kang, Chang-Won ;
Korean Journal of Poultry Science, volume 39, issue 3, 2012, Pages 207~213
DOI : 10.5536/KJPS.2012.39.3.207
This experiment was conducted to investigate the effects of various levels of dietary protein on laying performance and egg quality in laying quail. A total of six hundred forty 7-week-old laying type Japanese quail were divided into four groups with eight replicates per group (20 birds per replicate) and fed four diets differing in dietary protein levels (18, 20, 22 and 24%) with isocaloric corn-soybean meal-based diets for 8 weeks. The results showed no significant differences in feed intake and egg weight among the groups. With an increase in dietary protein levels, the egg production and daily egg mass were linearly increased (P<0.05). However, there were no significant differences in eggshell thickness and Haugh unit. The dietary protein did not affect the blood levels of GOT, GPT, BUN, albumin, and creatinine. The ammonia concentration of intestinal digesta was not affected by the dietary treatments. The contents of hepatic triacylglycerol in the groups fed diets containing 20% protein or more were significantly reduced as compared with that of 18% CP group (P<0.05). Overall, this study showed that relatively high levels of dietary CP are needed to sustain the higher egg production and daily egg mass and to avoid the hepatic triacylglycerol accumulation in Japanese quail.
Effects of Dietary Supplementation of Powdered Mulberry Leaves on Egg Production, Egg Quality and Blood Characteristics in Laying Hens
Park, Chang-Ill ; Kim, Young-Jik ;
Korean Journal of Poultry Science, volume 39, issue 3, 2012, Pages 215~222
DOI : 10.5536/KJPS.2012.39.3.215
This study was conducted to investigate the effects of supplementation diets of powdered mulberry leaves on egg production, egg quality and blood characteristics in laying hens. Laying hens were fed diets for 30 days containing 0% powdered mulberry leaves (Control), 1% powdered mulberry leaves (T1), 2% powdered mulberry leaves (T2), and 5% powdered mulberry leaves (T3). The egg production, yolk weight and albumen weight were no significant difference among treatment groups. The albumen weight was significantly decreased by the supplementation of powdered mulberry leaves in all treatment groups (P<0.05). The albumen high, yolk color score, egg sell thickness and egg shell breaking strength were no significant difference. The total cholesterol and triglyceride concentration of control was higher than T3, and the high density lipoprotein (HDL)-cholesterol concentration and glucose of control were lower than treatment groups (P<0.05). The white blood cell (WBC) was significantly increased by the supplementation of powdered mulberry leaves compared to the control (P<0.05). In conclusion, these data indicate that 5% powdered mulberry leaves supplementation was most effective in decreasing total cholesterol and triglyceride and increasing HDL-cholesterol, glucose and WBC.
Effects of Dietary Supplementation of Coffee Meal on Growth Performance, Blood Biochemical Profiles and Antioxidant Defense System in Broiler Chickens
Ko, Young-Hyun ; Kang, Sun-Young ; Jang, In-Surk ;
Korean Journal of Poultry Science, volume 39, issue 3, 2012, Pages 223~232
DOI : 10.5536/KJPS.2012.39.3.223
The effects of dietary supplementation of dried coffee meal (CM) on growth performance, blood biochemical profiles, the weights of immune-related organs, and the antioxidant defense system in broiler chicks were examined. A total of 162, 3-day-old male broiler chickens were assigned to three dietary groups: control group (CON), control diet added with 0.5% CM (CM0.5), and control diet added with 1.0% CM (CM1.0). In vitro antioxidant activity test, coffee extracts showed concentration-dependent increase in radical scavenging activity. Dietary addition of 0.5 and 1.0% of CM did not have negative effects on growth performance and feed conversion during the experimental periods, whereas dietary CM significantly (P<0.05) increased the relative weight of thymus without changes in the other organ weights. In addition, birds fed the diet supplemented with CM (0.5 and 1.0%) significantly increased blood albumin without affecting other components including glucose, triglyceride and cholesterol compared with those fed control diet. In antioxidant defense system, the specific activities of superoxide dismutase, glutathione peroxidase and glutathione S-transferase and the level of glutathione in the small intestine and liver were not affected by dietary supplementation of CM. However, hepatic lipid peroxidation in birds fed the diet supplemented with 0.5% CM was significantly (P<0.05) decreased compared with that in control birds. In conclusion, dietary supplementation of CM(0.5~1.0%) has potential for use as a natural antioxidant source without negative effect on growth performance in broiler chickens.
An Evaluation on Price Forecasts for Broiler by Agricultural Outlook
Hong, Seung-Jee ;
Korean Journal of Poultry Science, volume 39, issue 3, 2012, Pages 233~239
DOI : 10.5536/KJPS.2012.39.3.233
Public forecasts for broiler's prices such as Korea Rural Economic Institute (KREI) outlook information are important for producers and agribusiness decision makers in enhancing economic decision making. However, the KREI forecasts have not been fully evaluated so far. In this study agricultural outlook price forecasts for broiler are evaluated under accuracy-based measures and classification-based measures which test the ability to categorize price movements directionally or within a forecasted range. Agricultural outlook price forecasts for broiler are efficient but biased. In the aspect of the monthly direction of price change 59% of its forecasts over the sample period are correct, and actual prices fall within the forecasted range 32% of the time. Results suggest that it is necessary and meaningful for the agricultural outlook center to evaluate the current forecasting method and try to find an alternative method for improving the forecasting technique.
Analysis of the Foreign Gene Transmission in the GFP Transgenic Chickens
Jang, Ye-Jin ; Ji, Mi-Ran ; Jeon, Mi-Hyang ; Kim, Jeom-Sun ; Kim, Kyung-Woon ; Han, Deug-Woo ; Chung, Hak-Jae ; Yang, Byoung-Chul ; Yoo, Jae-Gyu ; Park, Jin-Ki ; Kim, Te-Oan ; Byun, Sung-June ;
Korean Journal of Poultry Science, volume 39, issue 3, 2012, Pages 241~244
DOI : 10.5536/KJPS.2012.39.3.241
This study was performed to analyze the generational transmission and the expression of the foreign gene in the GFP transgenic chickens. The transmission rate and the expression of the GFP gene was investigated from the GFP transgenic rooster (G2) as the first founder to the ninth (G8). Analysis of GFP expression in hatched chickens was used the UV lamp. When GFP was expressed in the wings, bill and legs of a chick, the bird only was selected as a transgenic chick. The average transmission rate of the overall transgenic was 38~58%. These results showed that the transmission of the GFP gene in the transgenic chickens in accordance with the laws of Mendel's continues to the next generation without gene silencing.
Performance of Laying Period of Two-way Crossbreed Parent Stock to Produce Laying-type Korean Native Commercial Chickens
Kim, Chong-Dae ; Choo, Hyo-Jun ; Kang, Bo-Seok ; Kim, Hak-Kyu ; Heo, Kang-Nyeong ; Lee, Myeong-Ji ; Son, Bo-Ram ; Suh, Ok-Suk ; Choi, Hee-Cheol ; Hong, Eui-Chul ;
Korean Journal of Poultry Science, volume 39, issue 3, 2012, Pages 245~252
DOI : 10.5536/KJPS.2012.39.3.245
This study was carried out to investigate the performance of laying period of two-crossbred of Korean native chickens for producing laying hens. A total of four hundred eighty female 2-crossbred chicks that restored strains and were aboriginal at National Institute of Animal Science. There were four crossbreds (4 replications/crossbred, 30 birds/replication) as A) C strain
Y strain, B) C strain
L strain, C) C strain
G strain, and D) C strain
W strain, respectively. There were no significant difference on age at first egg among crossbreds (P>0.05). Egg weight and body weight of B crossbred at first egg was higher than other crossbreds (P<0.05). Body weight of B crossbred was the highest 20 to 72 weeks (P<0.05), and C and D crossbreds were lower compared to A and B crossbreds (P<0.05). Average feed intake of B crossbred was the highest among crossbreds (P<0.05), and that of A crossbred was higher compared to C and D crossbreds (P<0.05). Weekly feed intake of four crossbreds decreased from 50 weeks. Weekly egg weight of B crossbred was the highest and that of D crossbred was the lowest among crossbreds (P<0.05). Feed conversion ratio of A and B crossbreds was lower than that of C and D crossbreds. Hen-house egg production of C crossbred was the highest among crossbreds until 26 weeks old (P<0.05), but there was no significant difference among crossbreds from at the age of 26 weeks (P>0.05). Hen-day egg production decreased after at the age of 38 weeks. Weekly egg production of A and B crossbreds was higher compared to C and D crossbreds at the age of 68~72 weeks (P<0.05). These results suggested the basic data on the record of laying period of 2-crossbreed Korean Native Chickens for producing laying hens.