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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
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Volume & Issues
Volume 37, Issue 4 - Dec 2010
Volume 37, Issue 3 - Sep 2010
Volume 37, Issue 2 - Jun 2010
Volume 37, Issue 1 - Mar 2010
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Effect of the Induced Molting with Low-Protein and Energy Diet on the Postmolt Performance and Egg Quality of Layers
Hong, Eui-Chul ; Park, Hee-Du ; Na, Seung-Hwan ; Kim, Hak-Kyu ; Yu, Dong-Jo ; Park, Mi-Na ; Jung, Kie-Chul ; Choo, Hyo-Jun ; Seo, Ok-Suk ; Choi, Yang-Ho ; HwangBo, Jong ;
Korean Journal of Poultry Science, volume 37, issue 2, 2010, Pages 117~123
DOI : 10.5536/KJPS.2010.37.2.117
This work was carried out to investigate the effect of the induced molting with low-protein and energy diet on the postmolt performance of layers. Eighty White Leghorn layers (61-old-wk) with over 80% egg production were used for 12 weeks in this work. Treatments were non-molt control (CO), fasting treatment for 10 days (FW), molt treatment with low-protein and low-energy molting diet for 3 weeks (LO), and molt treatment with standard molting diet for 3 weeks (ST) as 4 treatments (2 replications/treatment and 10 birds/replication). Body weight (BW) loss was 26.5% of initial BW at 2 week in FW treatment, and was 17.3% and 14.2% in both LO and ST treatments (P<0.05). Layers in molting treatments were fed with commercial layer diet after completion of molting since BW of layers was recovered for 7 weeks. Heart weight ratio was shown as 0.47, 0.43, 0.46 and 0.46% at CO, FW, LO and ST treatments, respectively, and liver weight ration of body weight was shown as 2.56, 1.30, 1.47 and 1.52%, respectively. Thus, those of molting treatments decreased compared to non-molt control (P<0.05). Oviduct weight ratio were shown as 3.95, 1.17, 1.54 and 1.67%, respectively, and similar with the results of liver (P<0.05). Feed intake decreased at LO and ST treatments during molting period and increased from the 5th week compared to control. Egg production decreased at 1 week in molt treatment and stopped at 2 week in FW, 3 week in LO, and 4 week in ST treatments. The birds started to lay egg at 4 week in FW and at 5 week in LO and ST treatments. Egg production was recovered until 50% at 6 week in FW and was recovered as 66.1 and 71.6% at 8 week in LO and ST treatment, respectively. Egg weights were similar among all treatments. Eggshell thicknesses were 0.41, 0.47, 0.46 and 0.46 mm at CO, FW, LO and ST treatment, respectively, but the higher in molt treatments than control (P<0.05). Eggshell breaking strength was 3.83 and 3.81 kg/
in FW and LO treatment, respectively, and high compared to control. However, eggshell breaking strengths were 3.54 and 3.78 kg/
and were not statistically different. Haugh units were 75.6, 81.1, 80.6 and 79.9 in 4 treatments and high in molt treatment. Finally, dietary low-protein and low-energy may induce molt as few effect on performance of layers.
Estimation of Genetic Parameters for Economic Traits in Korean Native Chickens
Kim, Hyo-Sun ; Kim, Si-Dong ; Lee, Seung-Soo ; Kang, Bo-Suk ; Lee, Jung-Gyu ; Cho, Kwang-Hyun ;
Korean Journal of Poultry Science, volume 37, issue 2, 2010, Pages 125~130
DOI : 10.5536/KJPS.2010.37.2.125
This study was conducted to estimate heritabilities, genectic and phenotypic correlations on economic traits in three strains of Korean Native chickens (KNC) : Black (B), Red Brown (RB) and Yellow Brown (YB). The data used in this study were collected from 2000 to 2007 in the National Institute of Animal Science and a total number was 14,421 birds. The effect of the strains analysis showed that the strain B were greater than the other strains for body weight at 150 days and 270 days. The number of egg production at 270 days of the strain YB was higher than the other strains. The estimated heritabilities age at
egg, body weight at 150 days, egg weight at
egg, body weight at 270 days, egg weight at 270 days and number of egg production at 270 days were 0.32, 0.50, 0.31, 0.43, 0.48 and 0.69 for strain B; were 0.42, 0.41, 0.19, 0.48, 0.44 and 0.76 for strain RB; were 0.44, 0.52, 0.24, 0.54, 0.51 and 0.66 for strain YB respectively, The genetic and phenotypic correlations were also estimated.
Effects of Dietary Buffer Material for Chicken Meat Grades and PSE Incidence in Broilers under Transport Heat Stress
Chae, Hyun-Seok ; Choi, Hee-Chul ; Na, Jae-Cheon ; Jang, Ae-Ra ; Kim, Min-Ji ; Bang, Han-Tae ; Kang, Hwan-Ku ; Kim, Dong-Wook ; Seo, Ok-Suk ; Park, Sung-Bok ; Ham, Jun-Sang ;
Korean Journal of Poultry Science, volume 37, issue 2, 2010, Pages 131~137
DOI : 10.5536/KJPS.2010.37.2.131
The present study has been performed to suggest a method to decrease the adverse effects of transportation on chicken meat quality. The groups were prepared as follows; Control group and three groups of treatments (sodium phosphate, sodium bicarbonate and magnesium sulfate). The chicken fed magnesium sulfate showed higher chicken meat quality compared to control and other treatment groups. Also, minor and severe PSE incidence of chicken breast was found at 88% in sodium phosphate group, 24% in sodium bicarbonate group and 56% in magnesium sulfate group. Control group showed 92% higher minor and severe PSE incidence of chicken breast compared to other groups. In control group, the external bruise of chicken showed 32% but 22, 24 and 44% in other treatment groups, respectively. Lightness (
) of chicken containing sodium phosphate treatment, sodium bicarbonate treatment and magnesium sulfate were 67.05, 66.27 and 65.89, while Lightness (
) of chicken containing control group was decreased of 67.88. In conclusion, dietary buffer material (sodium phosphate, sodium bicarbonate, magnesium sulfate) under heat stress decreased adverse effects including death, wound or abnormality of chickens.
Effects of Gamma-Irradiation on the Sterilization of Primordial Germ Cells in Quail
Park, Kyung-Je ; Kim, Tae-Min ; Lee, Hyung-Chul ; Jang, Hyun-Jun ; Song, Gwon-Hwa ; Han, Jae-Yong ;
Korean Journal of Poultry Science, volume 37, issue 2, 2010, Pages 139~143
DOI : 10.5536/KJPS.2010.37.2.139
Quail is a very useful animal model for studying vertebrate development because of its small body size and unique reproductive traits. This species is also ideal model for producing germline chimeras via transferring exogenous primordial germ cells (PGCs) into the recipient embryo. To increase the contribution efficiency of donor PGCs into recipients' tissues, decreasing the population of endogenous PGCs has been rate-limiting factor. We therefore conducted this study to investigate if gamma (
)-irradiation depletes endogenous PGCs in developing quail embryo. Firstly, freshly laid stage X quail embryos were irradiated with various output of
-irradiation and its teratogenic effect on the embryo was evaluated. Although a dose-dependent increase in the number of embryo showing malformation was found as the output increased (0, 250, 500, 750, and 1,000 rads), only a maximum of 10.1% of embryos were abnormal in 1,000 rads. Immunocytochemical analysis using the QCR1 antibody, which is specific marker for quail PGCs, was conducted to analyze the effect of sterilization. As results,
-rays at a dose-rate of 500 rads/73 sec onto undeveloped stage X embryo significantly reduced the number of germ cells to an average of 75.55 % and 82.03 % in male and female embryos, respectively. We conclude that
-ray selectively targets PGCs while affects minimally to the somatic development in quail embryo. Our results will not only provide important data for germline chimera production but can be used for analyzing the effect of ionized rays on the differentiating germ cells in various stages during animal development.
Effect of Agariemycetes Supplementation on Egg Quality and Fecal Noxious Gas Concentration in Laying Hens
Jung, Ji-Hong ; Kim, Hyo-Jin ; Wang, Jian Ping ; Kim, Chae-Hyun ; Jung, Cheong-Hwan ; Kim, In-Ho ;
Korean Journal of Poultry Science, volume 37, issue 2, 2010, Pages 145~150
DOI : 10.5536/KJPS.2010.37.2.145
This study was conducted to evaluate effects of dietary Agariemycetes on egg quality and fecal noxious gas concentration in laying hens. A total of two hundred forty laying hens were randomly allocated to four treatments with five replicates of twelve chicks per pen. The experiment lasted 42 days with a 7-day adjustment period. Dietary treatments were as follows: 1) CON (basal diet), 2) A1 (basal diet + Agariemycetes 0.1%), 3) A3 (basal diet + Agariemycetes 0.3%) and 4) A5 (basal diet + Agariemycetes 0.5%). There was no significant difference in egg production and egg weight between CON and Agariemycetes treatments. During the second week of the experiment, eggshell breaking strength was higher in A3 and A5 treatments than that in CON treatment (P<0.05). Besides, eggshell breaking strength in P5 treatment was higher when compared with that in CON treatment (P<0.05) in the sixth week. During the second week of the experiment, eggshell thickness was higher in Agariemycetes treatments than CON treatment (P<0.05). Also, A5 treatment was higher than other treatments in the fourth week of the experiment (P<0.05). At the end of the second week, yolk color unit in A5 treatment was lower compared with CON treatment (P<0.05). During the fourth week of the experiment, CON treatment was higher than A3 treatment (P<0.05). During the second week of the experiment, Haugh unit in A3 treatment was greater than that in CON treatment (P<0.05). At the end of six weeks, Haugh unit in CON treatment was lower than other treatments (P<0.05). Fecal ammonia and hydrogen sulfide were increased in Agariemycetes treatments when compared with CON treatment (P<0.05). Compared with CON and A5 treatments, fecal mercaptans was higher than in other treatments in first of the experiment (P<0.05). In conclusion, this study indicated that the addition of Agariemycetes in the diet improved the egg quality and decreased the feacal noxious gas concentration in laying hens.
The Effect of Oral Administration of Tissue Culture Medium Waste of Korean Wild Ginseng on Meat Quality of Broiler Chickens
Seol, Jae-Won ; Park, Jae-Hong ; Chae, Joon-Seok ; Kang, Hyung-Sub ; Ryu, Kyeong-Seon ; Kang, Chun-Seong ; Park, Sang-Youel ;
Korean Journal of Poultry Science, volume 37, issue 2, 2010, Pages 151~158
DOI : 10.5536/KJPS.2010.37.2.151
TCM-KWG (tissue culture medium waste after harvest of Korean wild ginseng) (panax ginseng) is left over of tissue culture medium used to grow Korean wild ginseng (KWG). The present study was conducted to investigate the effect of TCM-KWG on meat quality and the possible of application as additives in broiler chickens. A day old broiler chickens randomized in 6 groups (n=60/groups) were administered orally with 2, 4, 8, 16, 32 mL/L TCM-KWG through drinking water with one untreated control group. After administration for five weeks, we analyzed chemical composition and meat quality. Crude ash increased approximately 20% in TCM-KWG treatment groups as compared to control group whereas the concentration of moisture, crude protein and crude fat did not show any significant difference. Crude ash is essential to enhance skeleton formation and physiological function. TCM-KWG treatment gradually decreased the pH value of breast meat whereas it did not change the purge loss and cooking loss. The pH value of meat is important for preservation of meat for longer periods and high durability strength. These results suggest that TCM-KWG treatment may improve the quality of meat and can be apply as food additives in chickens.
Virulence of Ornithobacterium rhinotracheale Isolates for Embryonated SPF Eggs and Broilers
Kwon, Yong-Kuk ; Jeon, Woo-Jin ; Kang, Min-Soo ; Oh, Jae-Young ; An, Byung-Ki ; Song, Eun-A ; Kwon, Jun-Hun ; Lee, Cheong-San ; Kim, Jae-Hong ;
Korean Journal of Poultry Science, volume 37, issue 2, 2010, Pages 159~165
DOI : 10.5536/KJPS.2010.37.2.159
Field strains of Ornithobacterium rhinotracheale (OR) were tested on their virulence in specific pathogen free (SPF) embryonated chicken eggs and 3-week-old broilers. When infected with three different OR isolates (OR-161, OR-240 and OR-295) through yolk sac infection route, all strains appeared to be highly pathogenic with responsible mortality 66% and 100% within 12 days post infection (DPI). To test the virulence of OR in the commercial broilers, 3 week-old broilers were grouped depends on the inoculation route of OR isolate (OR-295) through five different infection routes; group 1 (IT: intratracheal), group 2 (IM: intramuscular), group 3 (IV: intravenous), group 4 (aerosol) and group 5 [Mixed: NDV (LaSota)+OR aerosol]. Within 5 to 7 days after inoculation, only broilers given NDV+OR were slightly depressed and coughing, and had mild facial redness. Grossly, foamy and yellow-white yogurt like exudate in the air sacs, predominantly in the abdominal air sacs was present. In histology, infiltration of the air sac epithelium and lamina propria by macrophage and polymorphonuclear granulocytes was seen with cell debris and inflammatory cells, correlated with the presence of OR antigen, as demonstrated by immunohistochemistry. Field strains of OR were able to induce high mortality in the embryonated chicken eggs, whereas broilers were less susceptible to OR infection. Interestingly, in the absence of NDV infection, the four groups of OR single infection only different route showed minimal and temporary microscopic air sac lesions. Thus, Newcastle disease virus (LaSota strain) showed triggering effects on the OR infection in chickens.
Rapid Detection of Infectious Bursal Disease Virus (IBDV) in Chickens by an Immunochromatographic Assay Kit
Choi, Kang-Seuk ; Oh, Jin-Sik ; Jeon, Woo-Jin ; Na, Keon-Sok ; Lee, Eun-Kyoung ; Lee, Youn-Jeong ; Sung, Hwan-Woo ; Ha, Gun-Woo ; Kwon, Jun-Hun ;
Korean Journal of Poultry Science, volume 37, issue 2, 2010, Pages 167~172
DOI : 10.5536/KJPS.2010.37.2.167
An immunochromatograhy (IC) based infectious bursal disease virus (IBDV) detection kit, which employed two anti-IBDV VP2 monoclonal antibodies, was evaluated for rapid diagnosis of infectious bursal disease virus (IBD). The detection limit of the IC kit for IBDV was
/mL, indicating that the IC kit detected IBDV sensitively as same as double antigen capture ELISA but less than a RT-PCR assay. The IC kit did not detect other viral pathogens such as Newcastle disease virus, infectious bronchitis, avian influenza virus, and infectious larynotracheitis virus. When applied to tissue samples of experimental chickens died 3 or 4 days post infection after very virulent IBDV (strain Kr/D62) infection, the IC kit detected IBDV in all samples of the bursa of Fabricius, spleen, kidney, cecal tonsil and in 87.5%, 37.5% and 0% of liver, thymus and proventriculus samples. In particular, BF tissue samples showed stronger signal bands than other tissues. Positive signal was observed. All except for one thymus sample of samples having negative results by the IC kit showed the same result with DAS-ELISA but RT-PCR assay detected IBDV in some of IC kit negative samples of thymus and proventriculus. When swab samples from the bursa of Fabricius of dead chickens (n=231) on field farms were tested, the sensitivity and specificity of the IC assay relative to RT-PCR was 100% (109/109) and 97.5% (119/122), respectively and kappa value between both assay was 0.97. The kit can provide a useful aid for rapid detection of IBDV in chickens under field circumstances.
Effects of Dietary Supplementation of Mulberry Leaves and Dandelion Extracts on Performance and Blood Characteristics of Chickens
Park, Chang-Ill ; Shon, Joong-Cheon ; Kim, Young-Jik ;
Korean Journal of Poultry Science, volume 37, issue 2, 2010, Pages 173~180
DOI : 10.5536/KJPS.2010.37.2.173
This study was conducted to investigate the effects of dietary supplementation of mulberry leaves and dandelion extracts on performance, proximate composition, heating loss, drip loss, and blood characteristics of chickens. One hundred sixty broiler chicks were fed diets for five weeks containing 1% mulberry leaves extracts (T1), 2% mulberry leaves extracts (T2), 1% dandelion extracts (T3), and 2% dandelion extracts (T4). At the end of five week feeding experiment, broiler were slaughtered, and stored at
. T2 resulted in much better weight gain and feed conversion than other treatment groups. As storage time increased, all treatment groups resulted in increased heating loss and drip loss (P<0.05) but no significant difference were observed among the treatment groups. In blood composition, GOT (glutamic oxaloacetate transaminase), GPT (glutamic pyrubic transaminase), total cholesterol, and triglyceride were significantly decreased by the supplementation of mulberry leaves and dandelion extracts compared to the control (P<0.05). Especially, T4 was significantly (P<0.05) more effective in improving blood composition compared to other treatment groups. However, no significant difference (P>0.05) were found in LDL-cholesterol among all treatment groups. In conclusion, these data indicate that compared to other treatments, supplementation of 2% dandelion extracts (T4) were most effective in decreasing total cholesterol and triglyceride and increasing HDL-cholesterol.
Evaluation of Efficacy of PoulShot
MG-F Vaccine against Mycoplasma gallisepticum Infection in the Layer Farms
Jeon, Eun-Ok ; Woo, Chang-Gok ; Won, Ho-Keun ; Mo, In-Pil ;
Korean Journal of Poultry Science, volume 37, issue 2, 2010, Pages 181~190
DOI : 10.5536/KJPS.2010.37.2.181
Mycoplasma gallisepticum (MG) infection results in severe economic loss in the poultry industry. In the previous reports, F strain, one of the MG live vaccine strains, could protect the bird from field infection of MG strains. In this study, efficacy of PoulShot
MG-F vaccine againset mycoplasma gallisepticum infection was evaluated for filed application in commercial layers. Commercial layers from two different farms received with PoulShot
MG-F, MG-F live vaccine at 9~14 weeks of age. Serological immune response to MG vaccine, the persistency of MG vaccine strain in the upper respiratory tracts and egg production rate were evaluated in the vaccinated, contacted or nonvaccinated flocks. The serological response was first detected at 3 weeks after vaccination (WAV) and persisted for 31 WAV. The MG vaccine strains were also persisted for 31 WAV based on the reisolation and PCR detection. There was no difference between the vaccinated or non-vaccinated flocks in the egg production rate but in the abnormality rate of eggs. Based on the above results, we suggested that the PoulShot
, MG-F live vaccine was fully immunogenic and had characteristics of long persistence in the upper respiratory trachea which will reduce economic loss caused by MG infection in the layer farms.