• Title/Summary/Keyword: 주령구

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Effect of Vitamin C Supplementation on the Performance and Eggshell Quality of Layers (비타민 C 첨가가-산란계의 생산성과 난각품질에 미치는 영향)

  • 백인기;임희석;남궁환
    • Korean Journal of Poultry Science
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    • v.29 no.2
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    • pp.135-140
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    • 2002
  • An experiment was conducted to determine the effects of vitamin C supplementation on the performance and egg quality of layers. A total of 800 ISA Brown layers of 71 weeks old were assigned to one of the following diets containing 0, 3, 10, 50 or 100 ppm LG-vitamin C, 100ppm free ascorbic acid, 100 ppm Rovimix stay C-35 or 50 ppm LG-vitamin C supplemented with 100 ppm Zn methionine chelate. The feeding trial was conducted for flour weeks during the period of May to June when the average ambient temperature was $23.8^{\circ}C$ (5 :00 PM). Each treatment was replicated five times with 20 birds housed in 2 birds cage units. Vitamin C supplementation did not improve the overall performances (egg Production and egg Quality). Birds fed 100 ppm of LG vitamin C had the lowest egg Production while birds fed 100 ppm of Rovimix-35 had the lowest egg weight among birds fed different sources of vitamin C. Although supplementation of vitamin C over 50 ppm increased soft and broken egg Production, supplementation of 10 ppm LG vitamin C showed lowest soft and broken egg Production among all treatments. E99she11 thickness was highest in the treatment of 50 ppm LG vitamin C. In conclusion, supplementation of vitamin C at the level of 3 ~ 100 ppm did not significantly influence the laying performance and eggshell quality of laying hens under normal ambient(20 ~$26^{\circ}C$ ) condition.

Comparison on Performance, Carcass Yield and Meat Quality Characteristics of Korean Indigenous Commercial Chicken (토종닭 실용계의 생산성, 도체율 및 육질특성 비교)

  • Kim, Ki-Gon;Cha, Jae-Beom;Kim, Hee-Jin;Choo, Hyo-Jun;Park, Byoungho;Hong, Eui-Chul
    • Korean Journal of Poultry Science
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    • v.48 no.4
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    • pp.277-285
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    • 2021
  • This study was conducted to compare performance, carcass yield, and meat quality of 4 Korean indigenous commercial chickens (Hanhyup 3: G, Sorae 1: V, Woorimatdak 1: S, Woorimatdak 2: W). A total of 384 chickens were divided into 4 treatments with 4 Korean indigenous commercial chickens, 6 repetitions per treatment, and 16 birds per treatment (♀ 8 birds, ♂ 8 birds). For 12 weeks, body weight was significantly higher in G and V breeds than S and W breeds (P<0.01), but body weight gain lower in S breed (P<0.05). Feed conversion ratio was significantly higher in W breed at 8~10 wk of age (P<0.05). There was no significant difference on livability among four treatments. Carcass yield and fresh meat ratio were highest in V breed at 12 wk of age (P<0.05). On breast meat, shear force was lower in G breed (P<0.05), and higher in male than in female (P<0.05). Lightness (L*) of breast meat was higher in female except V breed, and redness (a*) was significantly higher in breed G (P<0.05). Yellowness (b*) of breast meat was higher in G and V breeds, and higher in male than in female except breed G. In conclusion, G and V breeds showed superior performance, and S and W breeds showed superior meat quality.

Influence of Probiotics Supplementation on Egg Quality and Excretal Noxious Gas in Laying Hens (산란계에 있어 생균제의 첨가가 계란품질 및 배설물내 유해가스 함량에 미치는 영향)

  • Hong, J.W.;Kim, I.H.;Kwon, O.S.;Han, Y.K.;Lee, S.H.
    • Journal of Animal Science and Technology
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    • v.44 no.2
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    • pp.213-220
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    • 2002
  • This study was conducted to investigate the effects of feeding probiotics on the egg quality and excretal noxious gas in laying hens. One hundred forty four, 36 weeks old ISA brown commercial layer, were employed in a 28 d feeding trial with a 7 d adjustment period. Dietary treatments are 1) control(basal diet), 2) PB0.3(basal diet+0.3% probiotics), 2) PB0.6(basal diet+0.6% probiotics). For overall period, hen-day egg production, egg weight and egg shell breaking strength tended to increase (P>0.05) by dietary probiotic supplementation. Egg shell thickness was improved by supplementation of probiotics(linear effect, P$<$0.01). Diets PB0.3 and PB0.6 improved the yolk color compared to control diet(linear effect, P$<$0.02). As supplementation level of probiotics increased in the diets, egg yolk index tended to increase(linear effect, P$<$0.04). $NH_3$-N concentration in excreta fed PB0.6 diet was significantly (P$<$0.04) lower than either control or PB0.3 diet. In conclusion, supplementing probiotics to a Corn-SBM diet for laying hens increased egg shell thickness, yolk color and decreased egg yolk index, and decreased excretal $NH_3$-N concentration.

A Comparison of Fattening Performance, Physico-Chemical Properties of Breast Meat, Vaccine Titers in Cross Bred Meat Type Hybrid Chicks Fed Sulfur (유황을 급여한 육용 교잡계의 성장능력과 계육의 물리.화학적인 성상의 비교)

  • 박재홍;류명선;이영은;송근섭;류경선
    • Korean Journal of Poultry Science
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    • v.30 no.3
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    • pp.211-217
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    • 2003
  • A study was conducted to investigate the fattening performance, physico-chemical properties of breast meat, vaccine titers in cross bred meat type hybrid chicks fed organic sulfur. Total three hundred and sixty chicks of eight weeks old were replaced in individual cage from 8 to 10 weeks old. Four levels of organic sulfur (0, 1.0, 2.0, 4.0%) containing 45% sulfur were added into basal diet containing CP 19% and ME 2,950 kcal/kg. Weight gain, feed intake, fred conversion were weekly measured. The proximate composition, physico-chemical properties of breast meat, vaccine titer and sensory characteristics were examined at the end of experiment. Weight gain, feed intake and feed conversion of birds fed organic sulfur were not statistically different with control. There were no significant difference in feed intake and feed conversion. However, abdominal fat(%) of birds fed organic sulfur tended to increase compared with control. Crude fat of breast meat decreased significantly in organic sulfur treatments(P<0.05). The red color of breast meat seemed to increase but was not statistically different among the treatments. Cooking loss showed decrements significantly in organic sulfur treatments(P<0.05). Mechanical Hardness, cohesiveness and springiness were prone to be high and gumminess greatly high in breast meat of birds fed organic sulfur addition compared with control. Juiciness tended to increase and greasiness decreased(P<0.05) in organic sulfur treatments by the sensory evaluation. The overall acceptability of the breast meat was the highest at 2.0% organic sulfur added chicks(P<0.01). There were no different blood cholesterol, AST, ALT and BUN.

옻나무 유래 Flavonoid처리가 흰쥐 Leydig 세포의 체외배양에서 Testosterone분비에 미치는 영향

  • 성환후;최선호;민관식;장유민;나천수;정일정
    • Proceedings of the KSAR Conference
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    • 2001.03a
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    • pp.80-80
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    • 2001
  • 옻나무 유래 Flavonoid(F)는 항암 효과, 숙취해소 등의 효능이 있으며, 신장의 기능을 촉진하고 생식에도 영향을 준다고 알려져 있다. 그 주성분으로는 fustin, fisetin, sulfuretin, butein으로 추정되고 있다. 본 연구팀의 예비실험에서 성숙 흰쥐에게 F를 30일간 5mg씩 구강투여 하여 정소 중량 및 혈액 내 Testosterone 농도를 분석한 결과, 정소 중량이 증가되고 혈중 Testosterone의 농도도 대조구에 비해 유의적으로 높은 결과를 얻었다. 이에 본 연구의 목적은 옻나무 유래 F가 성숙 수컷 횐쥐의 생식 기능에 직접 미치는 영향을 알아보고자, 흰쥐 Leydig 세포를 분리, 회수하여 체외배양에서 Testosterone농도를 조사하였다. SD계 흰쥐(약 12주령, 체중 250g 전후)의 정소를 적출 한 후, Leydig 세포를 회수하기 위해 0.25% collagenase용액에 넣어 34$^{\circ}C$에서 15분간 진탕 수조에서 배양하였다. 배양된 정소조직은 D-MEM 배양액(10% FCS와 antibiotics 첨가)으로 2~3회 세척한 후 세포 수를 1$\times$$10^{6}$ cells/$m\ell$/well로 분주하여, F(20, 40, 80, 160ng), IGF-I(50, 100ng) 와 LH(10, 100ng) 용량별 각각 첨가하여 배양하였다. 각 처리 후, 배양시간(3, 6, 12, 24, 36시간)에 따라 배양액을 회수하여 COAT-A-COUNT(DPC, USA) kit를 이용하여 RIA방법에 의해 Testosterone을 분석한 결과는 다음과 같다. 대조구 Leydig 세포를 36시간까지 체외 배양하여 Testosterone의 농도를 조사한 결과, 24시간 배양구가 가장 높은 농도를 나타내었다. F를 단독 첨가하여 12시간 배양한 실험에서 F 80ng 첨가구에서 유의적으로 높은 농도를 보였다. LH 10ng 및 100ng 첨가구의 시간별 변화로는, LH 10ng 첨가구에서는 6~12시간 이후, LH 100ng 첨가구에서는 3~6시간 사이에서 유의적인 증가를 보였다. 또한, LH 10ng 첨가 실험에서는 LH 10ng+F 40ng에서 12시간 배양 시, 유의적으로 높은 Testosterone 분비를 확인하였으며, LH 100ng을 첨가하여 3시간 배양 시는 각 처리구 마다 높은 유의적 차이를 보였다. 한편, GH에 관여하는 IGF-I 첨가효과를 비교 검토한 결과, LH 100ng+IGF-I 100ng, 6시간 배양구에서 유의적으로 높게 나타내었다. 이상의 결과로, F 단독 처리 시의 적정량은 약 80ng이며, 흰쥐 정소 Leydig 세포의 Testosterone분비를 촉진하는 작용을 하는 것으로 사료되며, 특히 LH+F구에서 Testosterone분비를 더욱 향상시킴으로써 정소 Leydig 세포의 Androgen 생성을 촉진시키는 역할이 있는 것으로 보여진다 따라서 옻나무 유래 F는 포유동물의 생식기능에 중요하게 작용하는 것으로 사료된다.

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Effect of Dietary Xanthophylls Supplementation on Pigmentation and Antioxidant Properties in the Egg Yolks (Xanthophylls의 급여가 계란 노른자의 착색 및 항산화성에 미치는 영향)

  • Min, B.J.;Lee, K.H.;Lee, S.K.
    • Journal of Animal Science and Technology
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    • v.45 no.5
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    • pp.847-856
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    • 2003
  • This study was carried out to investigate the effects of dietary xanthophylls supplementation on pigmentation and antioxidant properties in the egg yolk. ISA Brown laying hens aged 50 weeks were fed five kinds of xanthophyll combination such as control(neither natural nor artificial xanthophylls in feed), T1(Commercial diet containing natural xanthopylls in grain + Lutein 10ppm + Capsantin 10ppm), T2(T1 + Capsanthin 65ppm), T3(T1 + Canthaxanthin 65ppm), T4(T1 + Capsanthin 10ppm + Canthaxanthin 65ppm), and T5(T1 + Capsanthin 65ppm + Canthaxanthin 10ppm). The pH values of all egg yolks were not significantly different during storage or feeding periods. CIE L$^{*}$(lightness) values of T2 ~ T5 egg yolks were lower than those of control and T1. Conversely, the CIE a$^{*}$(redness) value of T2 ~ T5 egg yolks showed significantly higher(P<0.05). Egg yolk from chicks fed xanthophylls increased CIE b$^{*}$ values. The CIE b$^{*}$(yellowness) values of T2 ~ T5 egg yolks were higher than control and T1 during storage at 37$^{\circ}C$ for 48 hours respectively. In the antioxidation experiment, dietary xanthophylls supplementation affected lipid antioxidation of egg yolk during storage. The TBARS(O.D.) of egg yolks from chicks fed xanthophylls were lower than that of control during incubation at 37$^{\circ}C$ for 10 hours. In conclusion, dietary xanthophylls supplementation influence to color difference and retardation of lipid oxidation in egg yolk.

Effect of Daily Protein Allowances during Lay on Egg Production and Feed Cost of Broiler Breeders (육용종계 산란기의 단백질 공급수준이 산란능력과 경제성에 미치는 영향)

  • 함영훈;김상인;이규호
    • Korean Journal of Poultry Science
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    • v.30 no.2
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    • pp.101-106
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    • 2003
  • In order to study the optimum daily protein allowance for broiler breeders of 24 to 64 weeks of age on a control-fed basis, an experiment was carried out with 400 hens of Arbor Acres strain. Four levels of protein allowances were used to supply 18 to 24g of protein per day in 2g increments. As the age of hens increased, a same stepwise increase and decrease in daily energy allotment was used in all treatments. Same amount of calcium, phosphorus, methionine and lysine were supplied in all treatments and throughout laying period. Hen-day egg production was highest in hens receiving 20g protein per day(p<0.05), but there was no significant difference among those fed daily protein ranging 18 to 22g, and increasing the daily protein allotment up to 24g resulted in a significant decrease(p<0.05). Average egg weight showed a trend to increase as the daily protein allowance increase(p<0.05), but no significant difference was found among the hens fed daily protein 20 to 24g. Feed and ME conversion was superior in hens receiving 20g daily protein(p<0.05). CP conversion was increased as the daily protein allowance increase(p<0.05), but there was no significant difference between hens receiving 18 and 20g daily protein. Feed cost required per egg or per kg egg was lowest in hens fed 20g daily protein. It could be concluded that the optimum daily protein allowance was 20g in all performances.

Studies on the Dietary Self-selection by Egg-type Layers (난용계(卵用鷄) 산란기(産卵期)의 선택채식(選擇採食)에 관(關)한 연구(硏究))

  • Lee, K.H.;Lee, D.S.
    • Korean Journal of Poultry Science
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    • v.21 no.1
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    • pp.41-48
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    • 1994
  • In order to get information for the improvement of feeding systems of egg-type layers, a dietary self-selection study was conducted. Corn diet, soybean meal diet, wheat bran diet, soybean meal+fish meal diet, and limestone diet were individually prepared for self-selection regime. Forty brown layers were offered either a control laying diet (C) or one of the 3 self-selection regime consisted of corn-soybean meal-limestone diet ($T_1$), corn-soybean meal-wheat bran-limestone diet ($T_2$) and corn-soybean meal+fish meal-wheat bran-limestone diet ($T_3$) for one wk each at 31 wk and 41 wk of age. In all dietary treatments, most of the eggs were laid from 0700 h 1300 h and hens consumed more feed, energy and protein on egg forming days than on non-forming days. On egg forming days, hens fed self-selection regime consumed less energy and protein than those fed control diet. On egg forming days, the consumption of feed, energy and protein increased continuously from 1000 h 2200 h in the control diet group but they decreased during the last 3 hours from 1900 h to 2200 h in self-selection regime groups. Up to 1600 h, calcium intake of the self-selection regime groups were much less than that of the control group but after that time, they increased markedly and were much more than that of the control group. The results of the study suggest that the practical self-selection regime for layers should be developed to meet the daily cyclic requirement for nutrients without consuming an excess energy and protein at certain times of the day.

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Influence of Powdered Velvet Antler on Growth and Intestinal Organ Development in Sprague-Dawley Rats (녹용분말 급여가 성장기별 흰쥐의 성장 및 장기발육에 미치는 효과)

  • Sung, H.G.;Kim, D.K.;Shin, H.T.
    • Journal of Animal Science and Technology
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    • v.45 no.5
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    • pp.749-758
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    • 2003
  • The velvet antler of Korean sika deer has been used to the important resources for human health care with ginseng in Korea and Chinese. For studying on biological function of deer velvet being recorded in many ancient literatures, this experiment was conducted to evaluate the effects of powdered velvet antler on growth, feed intake, feed efficiency and intestinal organ development in growing and adult Sprague-Dawley Rats. Experiments were designed by adding amount of powdered velvet antler such as control (non- supplementation), powdered velvet antler I (PVA I, recommended dose) and powdered velvet antler II (PVA II, thrice recommended dose). The recommended dose of powdered velvet in this experiment was calculated with metabolic body weight of rats, which based on the recommended amounts for 70 kg of human. The growths of growing and adult rats generally appeared advantage in PVA supplementation. The final body weight of control, PVA I and II were respectively 470${\pm}$39.00g, 478${\pm}$30.33g and 475${\pm}$22.72g in growing rats, and 485${\pm}$38.50g, 521${\pm}$38.67g and 508${\pm}$34.44g in adult rats. The average daily feed intake were not significantly influenced but the feed efficiency ratios (feed/gain) were improved by PVA supplementation. The feed/gain ratios of control, PVA I and II were respectively 5.99, 5.47 and 5.54 in growing rats, and 9.04, 7.73 and 8.18 in adult rats. In case of developments of liver, heart, kidney and stomach, we obtained favorable results in both PAC I and II, but their results were not significantly different according to amount of PVA supplementation. Because liver and heart are important organs in the circulation of blood, their favorable effects suggest that velvet antler may have factors contributing hematopoiesis. Conclusively, supplementation of powdered velvet antler resulted in an improved growth, feed efficiency and development of some intestinal organs in growing and adult rat. Even if further investigation of dose in human health care are should be performed, this experiment appeared the best desirable results in PVA I, recommended dose of powdered velvet antler.

Monascus Purpureus의 수준별 급여가 육계의 성장과 계란의 품질에 미치는 영향

  • 류경선;박재홍;류명선;김상호
    • Proceedings of the Korea Society of Poultry Science Conference
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    • 2002.11a
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    • pp.120-121
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    • 2002
  • Two experiments were conducted to investigate the effect of feeding Monascus Purpures(MP) on the growth performance of broiler chicks and egg qualify in laying hens. In Expt 1, MP were supplemented with 0. 0.5, 1.0, 2.0, 4.0% in basal diets. Weight gain, feed intake, feed conversion were examined for five weeks and blood cholesterol, protein were measured at the end of experiment. In Expt 2, diets supplemented with 0, 0.5, 1.0, 2.0, 3.0% MP were fed for two weeks. Egg qualify and yolk cholesterol were weekly measured. In Expt 1, Basal diets containing CP 21.5, 19%, ME 3,100, 3,200 kcal/kg were fed ad libitum for starting and finsihing period, repectively. In Expt 2, hens diet contained CP 16%, ME 2,800 kca1/kg and fed for two weeks. In Expt 1, weight gain of birds fed 2.0% MP was maximized at five weeks of age. Feed efficiency was not statistically different, but tended to improve in 1.0, 2.0% MP supplemental groups compared with control. Total serum cholesterol tended to be lower in 2.0% MP supplemental group but was not statistically different. In Expt 2, albumen height and Haugh unit of birds fed 1.0 and 2.0% MP were higher than other treatments, but was not statistically different. Yolk cholesterol of hens fed MP diets showed no significance.

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