• Journal of Animal Science and Technology
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• v.44 no.3
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• pp.369-376
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• 2002

Effects of dietary taurine on the abdominal fat weight and serum and liver concentrations of cholesterol were investigated with male broiler chicks. One-day old chicks were allocated to one of three taurine supplemented diets: 0 (control), 1 and 2%. Body weight gain of chicks fed the diet supplemented with 2% taurine decreased by 6% compared to the control (P$\prec$0.05). However, feed conversion ratio was not different among treatments. Liver weight and ratio of liver weight to body weight showed no difference among treatments. Abdominal fat weights were lower in 1% and 2% taurine supplementations by 14% and 20%, respectively, than that of the control (P$\prec$0.05). Serum concentrations of triglyceride, glucose, glutamic oxaloacetic transaminase and glutamic pyruvic transaminase were not different among treatments. However, serum concentrations of total cholesterol were higher in 1% and 2% taurine supplementations by 10% and 12%, respectively, than that of the control (P$\prec$0.05). Also serum concentrations of HDL-cholesterol increased in 1% and 2% taurine supplementations by 20% and 34%, respectively, compared to the control (P$\prec$0.05). Concentrations of total cholesterol in liver decreased in 1% and 2% taurine supplementation by 9% and 13%, compared to the control (P$\prec$0.05). Also concentrations of HDL-cholesterol in liver were lower in 1.0% and 2.0% taurine supplementation by 20% and 38%, respectively, than that of the control (P$\prec$0.05). These results showed that taurine supplementation decreased the fat storage in abdominal cavity and affected on the cholesterol metabolism in liver of broiler chicks.

• Korean journal of applied entomology
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• v.58 no.3
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• pp.189-196
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• 2019

While the darkling beetle, Alphitobius diaperinus (Panzer) (Coleoptera: Tenebrionidae) is considered a pest of stored products, it does not pose a significant economic threat to this industry. The grains these beetles feeding on are often already damaged. However, the beetle is now being treated as the foremost premise pest in the poultry industry in many countries of the world. Recently, the darkling beetle has also infested in broiler chicken houses of Korea. The problems caused by this pest destroy the insulate facilities of poultry houses, reduce chick's overall performance, transmit pathogenic organisms, and have been leading to substantial economic losses for poultry producers. Therefore, we conducted surveys on the status of infestation and damage of this pest in broiler chicken houses. Because there is no simple one step process that will completely eliminate darkling beetle populations from broiler facilities, we would like to outline further studies on the proper control measures.

• Korean Journal of Poultry Science
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• v.33 no.3
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• pp.233-238
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• 2006

In order to study the effect of feeding rare earth(RE) on growth of broiler chicks, feed conversion ratio, and probable harmfulness of feeding high levels of RE, two feeding trials with broiler chicks were conducted; one using a commercial broiler compound feed and the other using a self mixed feed excluding any growth stimulating feed additives. The the first trial used three hundred sixty of one day old Cobb broiler chicks for six levels of dietary supplementation of RE : 0, 100, 200, 400, 800 and 1,600 mg/kg. There were significant effect of RE stimulating broiler chick growth and improving feed conversion ratio, The dietary supplementation of RE at a level of 100 mg/kg was the best of all and increased body weight gain by 8.9% (p<0.05). Chicks fed RE at a level of 1,600 mg/kg grew as good as chicks fed feeds without RE and did not show my abnormalities. The second feeding trial was conducted in the same manner as the first trial using Ross broiler chicks and self-mixed experimental diets supplemented with RE at levels of 0, 50, 100 and 150 mg/kg. Differently from Results of the first trial, body weight gain and feed conversion ratio of were the best at the level of 50 mg/kg RE supplementation(p<0.05). In this trial all the birds fed RE showed significantly lower ratio of abdominal fat against live weight than those of the control group birds. Overall, it can be said that dietary supplementation of RE will improve broiler growth and feed conversion ratio and the proper dietary level would be $50\sim100mg/kg$. These results suggested that the proper level of RE for broiler chicks would be 50 to 100 mg/kg and its effectiveness is varied depending upon RE mixture. There appears abdominal fat of broiler chicks is decreased by feeding RE but further investigation is in need.

• Korean Journal of Poultry Science
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• v.38 no.3
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• pp.181-189
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• 2011

A 5-month (May to November in 2009) monitoring program for five viral pathogens in litter, such as avian influenza virus A (AIV), infectious bronchitis virus (IBV), infectious bursal disease virus (IBDV), fowl adenovirus (FAdV), and chicken infectious anemia virus (CIAV) was conducted in 62 flocks at 31 broiler farms (two flocks in each farm) in Korea in 2009. Viral pathogens were examined twice (before and at the end of the rearing period) at 31 broiler farms, and included fresh litter (n = 16) and recycled litter (n = 15) farms. Thirty-seven viruses (14 IBVs, 2 IBDVs, 9 FAdVs, and 12 CIAVs) were isolated from 75% (12/16) and 73% (11/15) of fresh litter and reused litter farms during the period, respectively, indicating no difference in viral contamination rate between farms using new and reused litter. Of these isolates, three (two CIAVs and one IBDV) were isolated from recycled litter samples collected before the rearing period at three broiler farms, whereas the others (n=34) were isolated from fresh and recycled litter samples collected at the end of the rearing period. When the performances, involving viability, body weight, and feed conversion ratio, were compared, no significant differences were found between farms using fresh and recycled litter during the period.

• Korean Journal of Poultry Science
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• v.33 no.2
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• pp.159-164
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• 2006

To investigate the effects of salt contents in diet and water on the growth of broiler chicks, 288 heads of Hubbards strain chicks, were fed with com-soybean meal diets containing 0, 0.25, 0.5, 0.75 1.0, 2.0, 3.0, or 4.0% salt from 1d to l4d posthatching. And 180 chicks were also supplemented with salt to their water at 0, 0.1, 0.2, 0.5 or 1.0%. Feed intake and weight gain tended to decrease as the salt levels in diets increased and those were the lowest in 4% group as 481 g and 168 g, however, mortality was the highest in 4% group as 75.0%. As for the salt levels in water, feed intake and weight gain were low as 427 g and 162 g in 1% group, while mortality was 77.8%. Salt poisoning chicks were shown with thirsty, appetite deficiency, rising impossibility, sleepiness, or convulsions, and in autopsy, were shown with ascites, hydropericardium, cardiac hypertrophy, hemorrhage of eyelid, hemorrhage of trachea, hemorrhage of intestine, etc. Conclusively, salt content above 4% in diet or 1% in water could reduce the performance in broiler chicks.

• Korean Journal of Poultry Science
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• v.30 no.1
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• pp.41-47
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• 2003

This study was conducted to investigate the in vivo and in vivo antibiotic effect of crude fucoidan extracted from Hizikia fusiforme, and to investigate any possible structural changes of broiler chick's intestinal villi by the supplementation of fucoidan. Total 84 broiler chicks were randomly assigned to 7 treatments, control and Salmonella typhimurium infection groups. The broiler chicks was infected with Salmonella typhimurium at third days, and antibiotics, fucoidan, dried Hizikia fusiforme, dried Undaria pinnatifida and yeast cell debris was respectively supplemented for each group. Each treatment had 4 chicks with three replications. Extraction yield of crude fucoidan from Hizikia fusiforme was 5.453%. Antibiotic effect of fucoidan was not detected in vitro, inhibition zone and micoorganism growth test. Weight gains of broiler chicks were tend to higher in fucoidan treatment group and yeast cell significance was not found. In in vivo test, the number of viable Salmonella typhimurium was low in the antibiotics and fucoidan treatment groups. The intestinal villi were short in the fucoidan and marine algae treatment groups. The intestinal villi were densely distributed on the large intestinal wall, but the morphology was not different among treatments.

• Korean Journal of Poultry Science
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• v.32 no.1
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• pp.43-48
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• 2005

An experiment was conducted to investigate the effects of mineral extract from granite on the performance, ammonia production from the litter, components of blood, Newcastle Disease (ND) titer and intestinal microflora in broiler chickens. Nine hundred sixty one-day-old broiler chickens (Ross) were assigned to five treatments: C; control, Zeolite; control + zeolite 1$\%$, AM10: control + active mineral water $10\%$ adsorbed zeolite $1\%$, AM20; control + active mineral water $20\%$ adsorbed zeolite $1\%$ and AM30; control + active mineral water $30\%$ adsorbed zeolite $1\%$. Each treatment consisted of four replicates with 48 broiler chicks for feeding trial. In order to test the effect of ND vaccine on the components of blood, ND titer and intestinal microflora, a separate group of 48 broiler chicks were assigned to the same 5 treatment as the feeding trial plus one negative control (No ND vaccine). Weight gain, feed intake, feed conversion and mortality were not significantly affected by dietary treatments but AM30 tended to be higher than other treatments in weight gain and feed intake, especially during later period (4 to 5 weeks of age). Ammonia production from the litter of AM30 treatment was significantly (P<0.01) lower than the control. Components of blood and ND titer in serum of broiler chickens were not significantly affected by treatments but MCHC (mean corpuscular hemoglobin concentration) of blood was significantly lower (P<0.05) in Zeolite treatment compared to others. The colony forming unit (CFU) of Clostridium perfringens in the small intestinal content of all zeolite and AM treated groups was significantly (P<0.01) lower than the control while the CFU of Escherichia coli was not significantly affected. The CFU of Lactobacilli in AM30 treatment was significantly (P<0.05) higher than the control. In conclusion, dietary supplement of active mineral water adsorbed to zeolite at $30\%$ level (AM30) tended to improve growth performance of broiler chickens and significantly reduced ammonia production from the litter. It also significantly increased CFU of intestinal Lactobacilli.

• Korean Journal of Poultry Science
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• v.25 no.4
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• pp.195-202
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• 1998

The present study was conducted to investigate the effects of dietary supplemental dry powder of Rehmannia radix (RR) root on the growth performance and physiological status of broiler chicks. The treatments consisted of corn-soybean meal control diet, and RR 0.5, 1, and 2％ diets. A total of 160 Arbor Acre male broiler chicks were randomly allotted to 16 pens ; four pens per treatment and 10 birds per pen. The growth performance, feed intake and carcass weight did not show any differences among the treatment groups, but feed conversion was significantly lower (P< 0.05) in RR 1％ group than that of the control group. The muscle color was lighter (P < 0.05) in RR lof group than those of the other treatment groups. The blood concentrations of protein, glutamic-oxaloacetic-transaminase (GOT) and glutamic- pyruvic-transaminase (GPT) were not different (P > 0.05) among the treatment groups, but the blood total cholesterol content was significantly decreased (P < 0.05) in RR 2％ group than those the other treatment groups. The blood concentration of sugar was lower (P <0.05) in RR 2％ group than those of the other treatment groups, and hemoglobin concentration was decreased (P <0.05) by addition RR. Crude fat content of thigh muscle was higher in RR 1％ group than those of the other treatment groups, and bone hardness of broiler chicks fed RR was higher (P < 0.05) than that of the control group. The saturated fatty acid content of the thigh muscle tende to be high in control and RR 0.5％ groups, and unsaturated fatty acid content tende to be high in RR 1 and 2％ groups than those of the other treatment groups

• Korean Journal of Poultry Science
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• v.31 no.1
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• pp.1-7
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• 2004

An experiment was conducted to investigate whether Saccharomyces cerevisiae(S. cerevisiae) could improve the growth performance and meat quality of broiler chicks. Day old 160 male broiler chicks were fed one of the two experimental diets without (0.0 %) or with S. cerevisiae (3.0 %) for five wks. Each treatment consisted of eight cages with 10 chicks per cage. Feed and water were provided ad libitum. Although not significant, BW gains of S. cerevisiae fed chicks tended to increase during 4∼5 wk of age. The addition of S. cerevisiae into the control diet significantly lowered the shear force in raw drumstick meat (P＜0.05). After 10 d of incubation, significantly lower levels of oxidation products were found (P＜0.05) in drumstick meats and skin samples from broiler chicks fed diets enriched with S. cerevisiae compared to those of the control group, while in breast meats the significant difference was monitored after 6 d of incubation. It is concluded that dietary S. cerevisiae could improve the tenderness and oxidative stability of broiler meats.