Kim, Ki Soo;Lee, Suk Kyung;Choi, Young Sun;Ha, Chang Ho;Kim, Won Ho
Korean Journal of Poultry Science
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v.40
no.2
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pp.97-103
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2013
The present study examined effects of production performance, immune activity and egg quality by raising on exercise yard in laying Hens, the results of which could be used as baseline data to enhance animal welfare and the safety of livestock products. A total of 90 Hy-line-Brown laying hens of 13 weeks old were used in the experiment for 38 weeks. The cage group (Cage group) was raised in a cage, where an area of $0.084m^2$ was assigned to two hens, while hens in the exercise yard $1.1m^2$ group ($1.1m^2$ group) was assigned to a combination of a chicken house ($0.11m^2$) and a exercise yard ($1.1m^2$) per a hen. Hens in the exercise yard $2.2m^2$ group ($2.2m^2$ group) was assigned to a combination of a chicken house ($0.11m^2$) and a exercise yard ($2.2m^2$) per a hen. Treatment was replicated 3 times with ten birds per replication. Ten birds were arranged according to randomized block design. While initial egg production rate was significantly higher in the Cage group, $1.1m^2$ group exhibited a slightly higher rate in the mid- and late-stage of the experiment, although the difference was not statistically significant. Exercise yard treatment groups exhibited a higher feed intake rate than the Cage group up until the hens were 39 weeks old (P<0.05), but the difference dissipated from that age on. The age at first egg in the exercise yard treatment groups was 16 days later than that for the Cage group (P<0.05), although differences in the quality of the eggs were not observed. The results of immune activity test showed that IgA in the exercise yard treatment groups was significantly higher than that in the Cage group (P<0.05). IgG, IgM, and corticosterone were also higher in the exercise yard treatment groups. The soil in exercise yard increased of organic matter and decreased of cation exchange capacity (CEC) in raised hens. In sum, raising hens in a exercise yard raise style decreased the rate of initial egg production, which was followed by a slight increase during the latter part of the experiment. The exercise yard raise hens' immune activity was heightened.
Kim, Sung-Kon;Kim, Nam-Kuk;Yoon, Du-Hak;Kim, Tae-Hun;Yang, Boo-Keun;Lee, Hyun-Jeong
Journal of Animal Science and Technology
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v.52
no.4
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pp.265-270
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2010
Adipogenesis has been one of the most intensely studied models of cellular differentiation. During adipogenesis, differential expression of many adipogenesis related genes lead to profound changes in cellular, morphological, and physiological characteristics of the differentiating cells. The aim of the present study was to examine the expression levels of adipogenic candidate genes, cAMP early repressor (ICER), nephroblastoma over-expressed protein (NOV), heat shock protein beta 1 (HSPB1) and succinate dehydrogenase (SDH), during adipogenesis of bovine mesenchymal stem cells (BMSC). The BMSC were cultured in DMEM / low glucose medium with adipogenic inducers for 6 days and the expression of various candidate genes which seemed related to adipogenesis were measured by real-time PCR. This study showed that the expression of peroxisome proliferator activated receptor ${\gamma}$(PPAR${\gamma}$) and fatty acid binding protein 4 (FABP4) genes as adipogenic indicators were increased to 3.11 and 3.11 folds on day 6 than on day 0, respectively (p<0.05). To determine whether candidate genes were related to adipogenesis, the expression levels of ICER, NOV, HSPB1, and SDH genes were measured during adipogenesis in BMSC. Our results showed that the expression level of ICER gene was significantly increased to 4.12 folds (0.01729 vs. 0.07138; p<0.05), whereas NOV, HSPB1, and SDH genes were decreased to 2.89, 3.18 and 2.36 folds, respectively, on day 6 when compared to day 0. These results suggest that these candidate genes have stimulatory or inhibitory effects on adipogenesis in BMSC, indicating that these genes may be directly or indirectly related to the adipogenic event of adipose precursor cells.
Kim, K.H.;Oh, Y.G.;Lee, S.C.;Shin, K.J.;Chung, W.T.;Kang, S.W.;Hong, S.K.;Ju, J.C.;Baek, B.H.
Journal of Animal Science and Technology
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v.49
no.1
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pp.41-50
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2007
Data from a comparative slaughter experiment with two hundreds of Korean native (Hanwoo) beef steers were utilized to determine net energy and protein requirements for growth (NEg and NPg). Eight randomly selected steers were used in the initial slaughter group of 6 month of age and the remaining steers allocated to treatments within two groups. The restricted groups were fed 1.2 to 1.5% concentrate per kg body weight (BW) in the growing period (6~12 month of age), 1.7 to 1.8% concentrate per kg BW in the early fattening period (13~18 month of age), and concentrate feed ad libitum in the late fattening period (19~30 month of age). Ad libitum groups were fed concentrate ad libitum through the whole period. Rice straw was offered ad libitum for 24 month of two feeding systems. The steers were slaughtered when animals reached every 2 month from 8 to 30 month of age. For all body composition determinations, whole empty body components were weighed, taken each proportional subsample was ground for chemical analysis. Equations developed with the pooled data to predicted NEg and NPg were similar to the equations of Japanese Feeding Standard for Beef Cattle (2000). First equations were developed to predicted NEg; NEg = 0.05332×LBW0.75×DG for restricted treatment and NEg = 0.04912×LBW0.75×DG for ad libitum treatment. Second equations were developed to predicted NPg; NPg = DG × (224.7-0.251×LBW) for restricted treatment and NPg=DG×(210.1-0.214×LBW) for ad libitum treatment.
Kim, J.G.;Kim, D.A.;Chung, E.S.;Seo, S.;Kim, J.D.;Ham, J.S.
Journal of The Korean Society of Grassland and Forage Science
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v.19
no.4
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pp.355-362
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1999
This experiment was conducted to evaluated the effect of maturity at harvest and wrap colors on the quality of round baled rye(Secal cereale L.) silage at the forage experimental field, Grassland and Forage Crops Division, National Livestock Research Institute, Suwon in 1998. The experiment was consist of split-plot design with three repications. The main plots were three different harvesting stages : boot, heading, and flowering stages, the subplots were wrap colors : white, black, and light green color. Acid detergent fiber(ADF) and neutral detergent fiber(NDF) of rye silage were increased with delayed harvesting date, but there were no significant differdence among wrap colors. However, average in vitro dry matter digestibility (IVDMD) of rye silage with white color wrap tended to have higher than those of other colors. The silage pH of heading stage was highest (5.12), and that of flowering stage was lowest (4.57) in different harvest stages. Among tested wrap colors, white color wrap resulted on lowest pH than others (p<0.05), but there were no significant difference between black and light green color. Dry matter (DM) content of rye silage were increased as harvest stage progressed (p<0.05). However, DM content of white color was highest among warp colors, but there was signifiant difference (p<0.05). Ammonia-N content of silage harvested at boot stage was the highest in harvest stage, but there was no difference between heading and flowering stages. Among wrap colors tested, ammonia-N content of black color was highest, but there was no significant difference. The number of lactic acid bacteria of white colors was highest in different colors, and that of flowering stage was highest among harvest stage. Acetic and butyric acid contents were decreased as harvest stage progressed, and lactic acid was increased from 6.33 to 7.98%. However, wrap colors did not influence lactic acid concentration. Among different wrap colors, outside temperature of rye silage was affected by air temperature, but effect of inside temperature was minimal. Black color wrap increased inside temperature by $3{\sim}5^{\circ}C$. The results of this study indicate that rye should be harvested for round bale silage after heading stage. The quality of rye silage wrapped white and light green color will increase slightly.
Kim, J.G.;Kim, D.A.;Chung, E.S.;Kang, W.S.;Ham, J.S.;Seo, s.
Journal of The Korean Society of Grassland and Forage Science
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v.19
no.4
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pp.347-354
/
1999
This experiment was carried out to determine the effect of maturity at harvest and inoculants on the quality of round baled rye(Secale cereale L.) silage at the experimental field of Grassland and Forage Crops Division, National Livestock Research Institute, RDA, Suwon in 1998. The experiment was consist of split-plot design with 3 replications. The main plots were 3 harvesting stages such as boot(20 April), heading(29 April), and flowering stages(14 May). The subplots wered inoculant treatments : control (untreated), inoculant A, and inoculant B. Acid detergent fiber(ADF), neutral detergent fiber(NDF), and in vitro dry matter digestibility (IVDMD) of rye silage were significantly increased with delayed harvesting date, but there was not significant difference between inoculants. Mean silage pH at flowering stage was the lowest(4.35), but the highest at early harvest(4.91). Inoculants significantly reduced acidity of silage compared with control. Dry matter(DM) content of the control was higher than that of inoculants. Ammonia-N as proportion of total N was below 10% which was maximum level of high quality silage. The addition of inoculants reduced ammonia-N. There were significant difference in organic acid contents between harvesting stages and inoculants. Lactic acid was increased with inoculants, but acetic and butyric acids were decreased. Various treatments increased colony forming unit(CFU) of lactic acid bacteria by 2 or 3 times compared with the control and the highest at flowering stage with inoculant B treatment. Results of this study indicate that use of microbial inoculant and harvesting after heading stage will improve the silage fermentation and quality of round baled rye silage.
Sohn, Sea Hwan;Cho, Eun Jung;Park, Ji Ae;Hong, Young Ho;Kim, Chong Dae
Korean Journal of Poultry Science
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v.42
no.2
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pp.157-167
/
2015
We compared the degrees of stress response of 12 domestic purebred chicken strains that have been bred at National Institute of Animal Science, RDA, Korea since 1980. As a physiological marker of stress response, the expression levels of heat shock protein (HSP)-70, HSP-$90{\alpha}$, HSP-$90{\beta}$, hydroxyl-3-methyl-glutaryl coenzyme A reductase (HMGCR) genes and telomere length were measured by quantitative real-time polymerase chain reaction using the lymphocytes of 1,101 chickens. There was significant difference in HSP-70, HSP-$90{\alpha}$, HMGCR expression and telomere length among the strains. There was also significant difference in HSP-$90{\alpha}$, HSP-$90{\beta}$, and HMGCR expression between male and female chickens. Different age groups of chicken exhibited different expression levels of HSP-70, HSP-$90{\alpha}$ and telomere length. The results of the HSPs expression level suggested that, the strains of R, L and Y were highly resistant to stress, whereas the strains of S, O and W were susceptible to stress. Although the statistical differences in some of HSPs gene expression existed between genders, the HSP expression results varied in different strains that some opposed to the others, and there might be interaction between strains and genders, which conclude that there was no difference in stress response between male and female chickens. Moreover, despite of significant difference in some of HSPs expression level, it was considered that there was no difference in stress response between ages due to the inconsistent trends among HSP markers.
Park, J.C.;Kim, Y.H.;Jung, H.J.;Ji, S.Y.;Lee, S.D.;Ryu, J.W.;Jang, H.D.;Moon, H.K.;Kim, I.C.
Journal of Animal Science and Technology
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v.49
no.6
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pp.839-846
/
2007
The objective of the present study was to investigate the effect of dietary supplementation of the ginseng by-product on growth performance and meat quality in finishing pigs. The animals used in the experiment were a total of 24 Landrace×Yorkshire and weighted 65.81±2.02kg. The experimental diets were basal diet(CON) and 2.5% ginseng by-product(GBP), which replaced lupin in basal diet. The pigs were allotted at 4 pigs per pen with three replicate pens per treatment by completely randomized design. In growth performance, ADFI was significantly lower(P<0.0001) in GBP than in CON. In plasma biochemical composition, total protein(P<0.01), blood urea nitrogen(P<0.03), glucose(P<0.01), albumin(P<0.02), calcium(P<0.01) and inorganic phosphate(P<0.01) were significantly higher in GBP than in CON. Carcass and meat quality were not significantly different between treatments. Total ginsenoside content on meat was significantly higher(P<0.0001) in GBP than in CON. TBARs was significantly lower in GBP than in CON for 6 days(P<0.03) and 12 days (P<0.06), respectively. Our research indicates that plasma biochemical composition, total ginsenoside content and TBARs were affected when replaced with ginseng by-product. Ginseng by-product in the pig diet increased pig muscle ginsenoside, indicating that ginseng by-product can be used as a feed additive.
This study was conducted to determine the effect of cryoprotectants(sugar, sorbitol, polyphosphate) on quality properties of chicken breast surimi manufactured by pH adjustment(pH 11.0) during frozen storage. Final surimi was divided into experimental units to which the following treatments were randomly assigned: C(Alaska pollack surimi, two times washing, 4% sugar+5% sorbitol+0.3% polyphosphate additive); T1(chicken breast surimi, 0.3% polyphosphate additive); T2(chicken breast surimi, 5% sorbitol +0.3% polyphosphate additive); T3(chicken breast surimi, 4% sugar+5% sorbitol+0.3% polyphosphate additive). All amino acid contents of control were higher than those of all treatments, while T2 was higher in amino acid contents among the treatments. Shear force of all treatments were higher than that of control, but the breaking force, deformation and gel strength were lower. The TBARS(thiobarbituric acid reactive substances) and VBN(volatile basic nitrogen) values of all treatments were lower than those of control, The TBARS values of all treatments were increased with increased storage period. In sensory evaluation, the score of appearance, meat color and overall acceptability of control were higher than those of all treatments, but aroma, juiciness and tenderness were lower than those for all treatments.
This study was conducted to investigate the effects of dietary probiotics and immunomodulator on growth performance, carcass characteristics, fecal $NH_3$ content and pathogenic bacteria counts in ileum and cecum and ileum of broiler chicken (Korean native chicken, HanHyup No. 3). A total of 120 (day-old) chicks were randomly divided into 5 treatments with 3 replicates and there were 8 birds per replicate. Dietary treatments consisted of five diets; the corn-soybean based control diet (C), the diet containing antibiotics (Avilamycin) 10 ppm (T1), the diet containing probiotics 1 [(Lactobacillus ($4.45{\times}10^6$) + yeast ($1.51{\times}10^6$) + Bacillus subtilis ($3.50{\times}10^5$)] at 0.5% level (T2), probiotics 2 [(Lactobacillus ($6.70{\times}10^7$) + yeast ($3.10{\times}10^6$)] at 0.5% level in diet (T3), and the diet containing probiotics 3 [T2 + ${\beta}$-glucan + organic acid] (T4) and raised for 9 weeks. There were no significant differences among treatments in weight gain, feed intake and feed conversion. Carcass ratios of broilers were higher in T3 and T4 than other treatments, however, the differences were non-significant. Internal organs and liver, heart weight were significantly increased in T4 (p<0.05) compared to other treatments. The fecal $NH_3$ gas content was decreased (p<0.05) in antibiotics fed group than others. However, probiotic fed groups were not different when compared with control. The number of Salmonella and E. coli in cecum were reduced in the group supplemented with probiotics and immunomodulator compared to the antibiotics (p<0.05). In this experiment, we showed that diets containing pro-biotics and immunomodulator were capable of an alternative to antibiotics.
Kim, W.H.;Seo, S.;Shin, J.S.;Lim, Y.C.;Kim, K.Y;Choi, K.C.;Kim, C.H.
Journal of The Korean Society of Grassland and Forage Science
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v.24
no.4
/
pp.317-323
/
2004
This study was carried out to determine the effect of seed method and seeding rate on the desirable agronomic characteristics and yield of forage barley(Hordeum vuigare) at paddy field, National Livestock Research Institute, RDA, Suwon from October 2001 to May 2003. The experiment was arranged in a spilt plot design with three replications. Main plots consisted of tow seed method; Broadcasting and drilling, Sub-plots consisted of seeding rates; 130. 160, 190 and 220 kg/ha. The results obtained were summarized as fellows ; The resistance of cold, disease and lodging of barley for the seeding method and seed rate were not different. And dry matter percentage of barley for a seeding method of 130 kg/ha at the broadcasting was the lowest of $32.0\%$, and that for the drilling at 130 kg/ha was $32.7\%(P<0.05). Fresh yield of barley for a seeding method of drilling at 130 kg/ha was the highest of 32,073 kg/ha, and that for a seeding method of broadcasting at 130 kg/ha was the lowest of 20,944 kg/ha(P<0.05). Dry matter yield of barley for a seeding method of drilling at 160 and 130 kg/ha were the highest 9,170 and 9,138 kg/ha, and that fur a seeding method of broadcasting at 130 kg/ha was the lowest of 5,710 kg/ha(P<0.05). Based on the results of this experiment, it appears that the seeding method and rate of barley could be enhanced by drilling from 130 to 160 kg/ha, and broadcasting from 190 to 220 kg/ha. respectively.
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