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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 35, Issue 3 - Sep 2008
Volume 35, Issue 2 - Jun 2008
Volume 35, Issue 1 - Mar 2008
Selecting the target year
Effect of Dietary Microbial Phytase on Laying Performance, Egg Quality, Phosphorus Utilization and Nutrient Metabolizability in Laying Hens
Jang, H.D. ; Hyun, Y. ; Kim, H.S. ; Hwang, I.W. ; Yoo, J.S. ; Kim, H.J. ; Shin, S.O. ; Hwang, Y. ; Zhou, T.X. ; Chen, Y.J. ; Cho, J.H. ; Kim, I.H. ;
Korean Journal of Poultry Science, volume 35, issue 2, 2008, Pages 115~121
DOI : 10.5536/KJPS.2008.35.2.115
The study was conducted to evaluate the effects of dietary microbial phytase on egg productivity, egg quality, phosphorus utilization and nutrient digestibility in laying hens. The animals used in the experiment were a total of 120 Hy-Line Brown laying hens (32 weeks old). Dietary treatments included 1) CON (basal diet), 2) LP (low phosphorus diet) 3) NP (low phosphorus diet + 0.03% normal microbial phytase) and 4) CP (low phosphorus diet + 0.03% coated microbial phytase). Six laying hens were allotted to a block (pen) with five replicated. Through the whole period of experiment, egg production was significantly increased in CON and CP treatments compared to LP treatment (P<0.05). CON, CP and NP treatments significantly increased their egg shell breaking strength and egg shell thickness compared to LP treatment (P<0.05). CON, CP and NP treatments resulted higher yolk color and Haugh unit than LP treatment (P<0.05). Calcium and inorganic phosphorus contents in blood were higher in CP treatment compared to LP treatment (P<0.05). Dry matter digestibility and nitrogen digestibility were greater in CP treatment than CON, LP and NP treatments (P<0.05). Crude ash was increased in CON, CP and NP treatments compared to LP treatment (P<0.05). Calcium digestibility and phosphorus digestibility were significantly improved in CP and NP treatments than CON and LP treatments (P<0.05). Calcium retention of CON, CP and NP treatments were higher than LP treatment (P<0.05). Phosphorus retention was increased in CP and NP treatments compared to CON and LP treatments (P<0.05). LP treatment significantly increased their nitrogen, calcium excretion compared to CON, CP and NP treatments (P<0.05). Phosphorus excretion was decreased in LP, CP and NP treatments compared to CON treatment (P<0.05). In conclusion, CP treatment improved egg production, egg quality, inorganic calcium and phosphorus in blood, calcium and phosphorus retention and nutrient digestibility and decreased nitrogen and calcium excretion in laying hens.
Effects of Antibiotic and Yeast Supplemental High Energy Diet on Growth Performance, Blood Characteristics and Carcass Trait in Broilers
Kim, H.J. ; Cho, J.H. ; Chen, Y.J. ; Kim, H.J. ; Yoo, J.S. ; Wang, W. ; Sim, J.M. ; Kim, I.H. ;
Korean Journal of Poultry Science, volume 35, issue 2, 2008, Pages 123~129
DOI : 10.5536/KJPS.2008.35.2.123
This study was conducted to investigate the effects of antibiotic and yeast supplemental high energy diet on growth performance, blood characteristics and carcass trait in broilers. Total of four hundred-eighty broilers were randomly allocated into three treatments with eight replications for five weeks. Dietary treatments included 1) CON (control; basal diet), 2) HED (high energy diet) and 3) YD (HED; yeast added to HED instead of virginiamycin, Sacchromyces cerevisiae,
). During whole period, weight gain had high tendency in HED treatment. However, there were not significant among treatments (P>0.05). Feed intake was higher in YD treatment than others. However, there were not significant among each treatments (P>0.05). Feed/Gain ratio was significantly lower in HED treatment than others (P<0.05). In blood characteristics, RBC, WBC and lymphocyte were not significant (P>0.05) among treatments. Liver weigh, LW/BW ratio, leg meat weigh, LMW/BW ratio, breast meat weigh, BMW/BW ratio, abdominal fat weigh and AF/BW ratio were not significant (P>0.05). However, body weight was improved (P<0.05) in HED treatment. In conclusion, this experiment is shown that HED treatment affects Feed/Gain ratio and body weight at final period in broilers.
Effects of Dietary Conjugated Linoleic Acid (CLA) and Oil Containing Unsaturated Fatty Acid Supplementation on Egg Production Rate and Quality in Laying Hens
Kim, H.J. ; Yoo, J.S. ; Shin, S.O. ; Cho, J.H. ; Chen, Y.J. ; Huang, Y. ; Kim, Y.J. ; Whang, K.Y. ; Yang, M.S. ; Kim, D.J. ; Kim, I.H. ;
Korean Journal of Poultry Science, volume 35, issue 2, 2008, Pages 131~136
DOI : 10.5536/KJPS.2008.35.2.131
This study was conducted to investigate the effects of dietary conjugated linoleic acid (CLA) and oil containing unsaturated fatty acid supplementation on egg production and quality in laying hens. Two hundred-eighty eight, 36 week old ISA brown commercial layer, were employed in a 5 week feeding trial. Dietary treatments are 1) BO (basal diet + 1% soybean oil + 1% oat), 2) BS (basal diet + 1% safflower oil + 1% oat), 3) BF (basal diet + 1% free fatty acid + 1% oat), 4) CD (basal diet + 1% CLA containing diglyceride + 1% oat), 5) CT (basal diet + 1% CLA containing triglyceride + 1% oat) and 6) CP (basal diet + 1% CLA by-product + 1% soybean oil). For overall period, hen-day egg production was not significant among treatments (P>0.05). Egg shell breaking strength at 3 weeks in CP treatment was significantly lower than BS, BF, CD and CT treatments (P<0.05) and that at 4 weeks in BO and CP treatments was significantly lower than others (P<0.05). Egg shell thickness at 3 and 4 weeks in CP treatment was significantly lower than BS, BF, CD and CT treatments (P<0.05). Egg weight at 3 and 4 weeks in CP treatment was significantly lower than others (P<0.05). Yolk height at 4 weeks in BF and CT treatments was significantly highest compared to BO, CD and CP treatments (P<0.05) and among BO, CD and CP treatments, that in BO and CD treatments was significantly higher than CP treatment (P<0.05). At 4 weeks, yolk color in CP treatment was significantly higher than BO and BS treatments (P<0.05). Haugh unit at 3 and 4 weeks in BO and CP treatments was significantly lower than others (P<0.05). In conclusion, supplementing CLA and oil containing unsaturated fatty acid for laying hens improved egg shell breaking strength, egg shell thickness, egg weight, yolk height, yolk color and haugh unit.
Effects of Single or Mixed Supplementation of Bacterial Phytase and Fungal Phytase on Laying Performance and Nutrient Digestibility
Kang, H.K. ; Park, S.Y. ; Yu, D.J. ; Kim, J.H. ; Kang, G.H. ; Na, J.C. ; Kim, D.W. ; Suh, O.S. ; Lee, S.J. ; Lee, W.J. ; Kim, S.H. ;
Korean Journal of Poultry Science, volume 35, issue 2, 2008, Pages 137~142
DOI : 10.5536/KJPS.2008.35.2.137
This study was conducted to investigate the effect of single or mixed supplementation of bacterial and fungal phytase using 45-wk-old 450 Hy-Line Brown laying hens housed in individual cages for 12-wk period. The birds were reallocated to have similar egg productivity by examining the egg production for one wk before starting the experiment. Two sources of phytase, bacterial (BP) and fungal (FP), were used either in single or mixture to determine the effects of these phytase. Five dietary treatments consisted of control (BP 0, FP 0), T1 (BP 300, FP 0), T2 (BP 300, FP 300), T3 (BP 300, FP 3000), and T4 (BP 0, FP 3000). The DPU was used for phytase activity in this experiment. The nonphytate phosphorus (NPP) content of control was 0.30%, and those of phytase treatments were set to 60% of the Control. Experimental diets were fed ad libitum throughout the experimental period. The lighting schedule of 17L7D was employed. The egg production was not different between control and bacterial phytase treatments, but the T4 showed significantly low productivity compared to control (P<0.05). No difference was found in average egg weight among all treatments. The daily egg mass did not show any statistical differences among all treatments: however, it was significantly low in T4 compared to ther control during the latter half of the experiment (P<0.05). No significant difference was found among treatments in terms of feed intake, feed conversion and egg quality. The digestibilities of dry matter, crude protein, and fat digestibility were similar regardless of the treatments. No significant trends were detected in Ca and P availability. In conclusion, the BP level of 300 DPU contributed to achieve 40% reduction of recommended nonphytate phosphorus addition. The synergistic effect of bacterial and fungal phytase was not confirmed.
The Effects of Supplemental Bacterial Phytase to the Calcium and Nonphosphorus Levels in Feed of Laying Hens
Kang, H.K. ; Park, S.Y. ; Yu, D.J. ; Kim, J.H. ; Kang, G.H. ; Na, J.C. ; Kim, D.W. ; Suh, O.S. ; Lee, S.J. ; Lee, W.J. ; Kim, S.H. ;
Korean Journal of Poultry Science, volume 35, issue 2, 2008, Pages 143~151
DOI : 10.5536/KJPS.2008.35.2.143
This study was conducted to identify the correlation of bacterial phytase (
) to the calcium level in feed. Of all 21-week-old 720 HyLine brown laying hens, 2 birds of similar weight were placed on each individual cage. The experiment was conducted by
factorial design with including 3 different levels of phytase (0, 300, and 1,000 DPU/kg), 2 different levels of calcium (3.5% and 4.0%), and 3 different levels of no NPP addition 0% (0.095 NPP), 0.5% (0.185% NPP), and 1.0% (0.275% NPP). The feeding trial maintained the ME level of 2,800 kcal/kg and 16% for crude protein. The diet was fed ad libitum and 17 hours of lighting was provided throughout the experimental period. Egg production seemed to increase, in the 300 DPU of bacterial phytase added group and the cracked egg tended to reduce in Transphos added group. The egg productivity between treatment groups did not show significant difference by dietary calcium level, whereas non NPP added group (0.095% NPP) was found to be low compared to NPP added groups (P<0.05). The highest mean egg weight and the highest daily egg mass were detected in 300 DPU phytase added group. Although the mean egg weight was significantly higher in treatment groups fed with 3.5% calcium containing feeds (P<0.05), daily egg mass was no among treatment groups. The mean egg weight and daily egg mass were the lowest in non NPP added group (0.095% NPP) compared to other treatment groups (P<0.05). The feed intake showed similar pattern regardless of the bacterial phytase and calcium levels in the diet. However, the treatment groups fed diets containing NPP level of 0.275% and 0.165% showed significantly higher feed intake than the group fed with 0.095% NPP (P<0.05). Although the feed conversion was not affected by calcium and NPP levels in the diet, the most improved result was obtained from 300 DPU phytase added group (P<0.05). The eggshell breaking strength and thickness increased as dietary calcium level increase the level of calcium increases in diet. The treatment groups fed diet containing 0.275% and 0.165% NPP revealed to show improvement in eggshell breaking strength and yolk color index compared to the NPP non added (0.095% NPP) treatment group. The result of the present study suggests that the appropriate level of microbial phytase is 300 DPU and at this level, tricalciumphosphate supplementation in feed can be reduced to 40% of NRC recommendation. Higher calcium level in feed fail to show synergistic effect by adding microbial phytase.
Effects of Feeding Mixture of Probiotics and Colistin
on Performance and Egg Quality in Laying Hens
Yun, J.Y. ; Kim, J.Y. ; Kim, J.S. ; Lee, B.K. ; Ahn, B.K. ; Hwang, Y.B. ; Kang, S.K. ; Kim, D.G. ; Kang, C.W. ;
Korean Journal of Poultry Science, volume 35, issue 2, 2008, Pages 153~162
DOI : 10.5536/KJPS.2008.35.2.153
This experiment was conducted to evaluate the dietary effects of mixture of probiotics and colistin on laying performance, intestinal microflora and egg yolk cholesterol in laying hens. One hundred sixty 50-wk-old Hy-Line Brown layers were divided into four treatments and fed a commercial diet (Control) or experimental diets containing 0.2% mixture of probiotics or probiotics and colistin mixture (T1, Bacillus subtilis + Aspergillus oryzae + Lactobacillus plantarum; T2, Bacillus subtilis + Aspergillus oryzae; T3, Bacillus subtilis + Aspergillus oryzae+colistin) for 8 wk. No significant differences were found in laying performance and liver weight among the groups. The Haugh unit of treated groups were significantly improved (P<0.05) compared to that of control, but eggshell qualities were not changed by the treatments. The cecal ammonia concentration was significantly decreased in both T1 and T3 groups. The number of coli forms in cecal content and feces were significantly reduced in all treated groups compared to that of Control (P<0.05). The egg yolk cholesterol contents in the groups fed the diet containing mixture of probiotics and colistin were reduced in comparison with that of Control. In conclusion, dietary supplementation of mixture of probiotics and colistin improved quality of egg albumen, and reduced the egg cholesterol contents. They also reduced intestinal coli forms without harmful effects on overall productive and physiological responses in laying hens.
Potential Allelic Association of Microsatellite Markers on Chromosome 1 with Economic Traits in Korean Native Chicken
Kim, H.K. ; Oh, J.D. ; Kang, B.S. ; Park, M.N. ; Chae, E.J. ; Jung, H.M. ; Seo, O.S. ; Choe, H.S. ; Jeon, G.J. ; Lee, H.K. ; Kong, H.S. ;
Korean Journal of Poultry Science, volume 35, issue 2, 2008, Pages 163~169
DOI : 10.5536/KJPS.2008.35.2.163
A total of 17 polymorphic microsatellite markers on chromosome 1 were used for allelic association tests with phenotypic traits in Korean native chicken. Chi-square tests were performed to compare the frequencies of individual alleles between the high and the low trait groups. The frequency of allele 123 of MCW0160 showed a significant difference between the high and the low groups in the trait of egg weight (EW). Three markers, namely ADL0234, UMA1.125 and ADL0101, were found to show significant differences in allelic distribution for the trait of the first lay day (FLD). UMA1.117, ADL0020, UMA 1.019, LMA1 and ADL0238 were found to show significant differences in allelic distribution for the trait of body weight (BW). ADL0101 and ADL0238 were found to show significant differences in allelic distribution for the trait of number of egg production(EP). In this study, we identified the QTL for economic traits at around 94 (MCW0160), 151 (ADL0234), 170 (UMA1.125), 225 (UMA1.117), 285 (ADL0020), 387 (UMA1.019), 418 (LMA1), 500 (ADL0101) and 520 (ADL0238) cM on chromosome 1 in Korean native chicken. The results provided a useful guideline for identification of positional candidate gene and marker-assisted selection for economic traits in Korean native chicken.
Effect of Feeding-Induced Molting on the Performance and Egg Quality in Laying Hens
Na, J.C. ; Yu, D.J. ; Bang, H.T. ; Kim, S.H. ; Kim, J.H. ; Kang, G.H. ; Kim, H.K. ; Park, S.B. ; Suh, O.S. ; Jang, B.G. ; Choi, J.T. ; Choi, H.S. ;
Korean Journal of Poultry Science, volume 35, issue 2, 2008, Pages 171~176
DOI : 10.5536/KJPS.2008.35.2.171
Animal welfare advocates, claim that the induced molting by fasting be avoided. This study was conducted to evaluate the effect of molting induced by various feeding methods on productivity and egg quality in laying hens. We used 400 flocks of 60-week-old leghorn laying hens in four treatments(five replicates of 20 hens each): fasting method (C), feeding single corn grain diet (T1), feeding single wheat bran diet (T2) and feeding single alfalfa meal diet (T3). As the result of the experiment, egg production and daily egg mass significantly decreased only in T1 compared with the control during the
week after the secondary egg laying (P<0.05). Although the amount of feed intake was significantly less in T1 group during the
week compared to the control, no significant difference was detected during the total period (P>0.05). In addition, no significant difference of feed conversion was observed between treatment groups. In terms of egg quality, the egg shell thickness was significantly improved in T1 group than the control group by feeding only corn at the 10th and 14th week after the secondary egg laying (P<0.05), but the significant decrease was observed at the corn (T1) and wheat bran (T2) fed treatment groups than the control group at the 26th week of the experiment (P<0.05). The eggshell strength and haugh unit did not show any difference by the molting methods. Egg yolk color was significantly decreased in T1 and T2 group than the control group at the 6th week (P<0.05). However, T1 and T2 group resulted to show significantly high egg yolk color at the 18th week of the experiment (P<0.05). As the result of the experiment, no large difference was observed in the productivity by the feeding molting method and by the fasting induced molting method. In addition, the single diet fed feeding induced molting method by using alfalfa revealed to show more satisfactory trend than the corn or wheat bran single diet fed feeding induced molting methods even if no statistically significant difference was found in terms of egg productivity.
Effect of Holding Time of Broiler at Slaughter House on Color, PSE, Appearance of Chicken Meat
Chae, H.S. ; Yoo, Y.M. ; Jeong, S.G. ; Ham, J.S. ; Ahn, C.N. ; Jang, A.R. ; Yoo, H.S. ;
Korean Journal of Poultry Science, volume 35, issue 2, 2008, Pages 177~182
DOI : 10.5536/KJPS.2008.35.2.177
This studies were conducted to investigate the effect of holding time of broiler at slaughter house on chicken meat quality. Short holding time (
) increased chicken meat quality compared to long holding time (
), which resulted in 14% higher grade
chicken. In portioned meat, short holding time (
) resulted in 15% higher incidence of grade
chicken breast. Also, long holding time occurred higher PSE incidence of chicken breast. pH value of the chicken meat with short holding time was similar to that with long holding time, and that with medium holding time showed the lowest.
(lightness) value of the chicken meat was lower with medium holding time than with short holding time, but that in muscle and skin showed increasing tendency with long holding time. Holding time showed no effect on
(redness) of the chicken meat, but longer holding time decreased
(yellowness) value. This indicated that long holding time adversely affected chicken meat quality.
Effect of Various β-1,3-glucan Supplements on the Performance, Blood Parameter, Small Intestinal Microflora and Immune Response in Laying Hens
Park, K.W. ; Rhee, A.R. ; Lee, I.Y. ; Kim, M.K. ; Paik, I.K. ;
Korean Journal of Poultry Science, volume 35, issue 2, 2008, Pages 183~190
DOI : 10.5536/KJPS.2008.35.2.183
This study was conducted to investigate the effect of feeding diets supplemented with
products on the performance, small intestinal microflora and immune response in laying hens. The
products used in the experiment were
of microbial cell wall origin,
; microbial cell wall origin,
; oat origin,
; barley origin. A total of 720 Hy-Line Brown laying hens of 40wks old were divided into 5 dietary treatments : T1 ; Control( C), T2 ;
, T3 ;
, T4 ;
, T5 ;
. Each treatment was replicated 4 times with 36 birds/replicate housed in 2 bird cages, and arranged according to completely randomized block design. Feeding trial lasted 40ds under 16 h lighting regimens. There were significant differences among treatments in hen-house egg production feed intake and feed conversion. HiGlu treatment was significantly higher than OGlu treatments in hen-house egg production.
supplemented treatments were lower than the control in feed intake and feed conversion ratio. All
supplemented treatments were significantly higher than the control in eggshell strength. Eggshell color and Haugh unit tended to be lower in the supplemented group than the control. IgY concentration was not significantly affected by treatments. At
week of experiment, however, IgY concentration tended to increase in the supplemented groups. Among the leucocytes parameters, WBC, heterophil, lymphocytes, monocyte and eosinophil concentration were lower in the supplemented groups than those of the control. Among erythrocytes, HCT(hematocrit) and MCV(mean corpuscular volume) were significantly affected by treatment. MCV of supplemented groups were higher than that of the control. Immunoglobulin concentrations in the birds were not significantly different among treatments. However, IgA concentration tended to be low in the supplemented groups than the control. The cfu of small intestinal microflora were not significantly different among treatments, but that of Cl. perfringens tended to be lower than the control. The result of this experiment indicateted that feeding
to laying hens improve feed conversion ratio and eggshell strength. Also intestinal microflora and immune responses are modified.
Studies on Changes of Carcass Characteristics during Slaughtering Process and Physical Properties of Ostrich Muscles
Hong, G.P. ; Kim, C.J. ; Lee, S. ; Min, S.G. ;
Korean Journal of Poultry Science, volume 35, issue 2, 2008, Pages 191~196
DOI : 10.5536/KJPS.2008.35.2.191
This study was carried out to investigate the changes in carcass characteristics during slaughter process and to evaluate the physical properties of ostrich muscles. After blooding, pH of carcass was declined rapidly and showed 5.89 of final pH, whilst temperature was slightly decreased during slaughter process. Carcass of ostrich yielded 49.3%. For the comparison between muscles, m. gastrocneminus and m. iliofemoralis externus showed a significantly high pH (P<0.05). The muscle of which pH tended to be high in water holding capacity (WHC), however, m. gastrocneminus showed a significantly low WHC (P<0.05) due to low moisture content. M. obturatorius medialis showed the significantly lower shear force, whilst m. gastrocneminus was higher than other muscles (P<0.05). Therefore the results indicated that the production of high quality carcass was to reduce the time during slaughter process, and that high WHC and tenderness of ostrich meat had a potential application as a substitutional species to other animals.
Egg Utilization Survey for School Meals in Gyunggi Province of Korea
Yoo, Y.M. ; Chae, H.S. ; Jeong, S.G. ; Ham, J.S. ; Jang, A. ; Yoo, H.S. ; Ahn, C.N. ;
Korean Journal of Poultry Science, volume 35, issue 2, 2008, Pages 197~203
DOI : 10.5536/KJPS.2008.35.2.197
A total of one hundred and ninety five nutritionists selected based on population scale in high schools in Gyunggi Province were questioned about utilization of eggs in school meals. Almost half of those nutritionists have utilized eggs in school meals
times per month. Most frequent cooking methods of eggs were boiled eggs. Eggs obtained from food distributors and egg distributors were 80.8% and 13.2%, respectively. Also, the nutritionists in middle population area prefer to purchase graded eggs. The most frequently occurring problems in cooking eggs were egg shell braking and related food safety. The present study revealed that egg is good for school meals, but various menus for easy cooking are yet to be developed.