• 한국유기농업학회지
• /
• 제11권2호
• /
• pp.79-89
• /
• 2003

본 연구는 지렁이 분말의 첨가가 육계의 성장 및 사료 중 영양소 이용율에 미치는 영향을 조사하기 위해서 실시되었다. 총 120수의 7일령 육계에 지렁이 분말 0％(대조구), 0.2％ 및 0.4％를 첨가한 사료를 공시하여 6주간 사양시험을 실시하였다. 육계초기 및 후기사료 급여 공히, 증체중 및 사료섭취량 0.4％ 지렁이 분말 처리구가 대조구 및 0.2％ 처리구보다 유의하게 증가하였다(P<0.05). 처리구간에 사료요구율과 도태율은 유의한 차이가 인정되지 않았다. 육계 초기 및 후기 사료급여 공히, 처리구간에 사료의 건물소화율의 차이는 인정되지 않았다. 그러나 사료 중 조지방과 조회분 소화율은 지렁이 분말 섭취에 의해서 증가하는 경향이 인정되었다. 지렁이 분말 0.4％ 첨가구에서의 사료 중 조단백질 소화율은 지렁이 분말 0％(대조구) 또는 0.2％ 첨가구보다 유의하게 개선되었다(P<0.05). 결론적으로 브로일러에 0.4％의 지렁이 분말을 첨가한 사료급여는 사료중의 조단백질 이용율을 유효하게 개선시켜서 성장을 유효하게 개선시키는 것이 인정되었다.

• 한국가금학회:학술대회논문집
• /
• 한국가금학회 2000년도 제17차 정기총회 및 학술발표
• /
• pp.36-53
• /
• 2000

Five experiments were conducted to investigate the effects of antioxidants(Santoquin and Oxiban) using fresh or oxidized fat on the performance of broiler chicks. Day-old broiler chicks (except for Experiment 5 in which 6-d-ol birds were given experimental diets for 10 d) were fed diets containing fresh or oxidized fat (animal-vegetable fat blend in Experiments 1, 4, and 5 and corn oil in Experiments 2 and 3) with or without graded concentrations of Santoquin (0,250, 500 ppm in Experiments 1 and 2 and 0, in Experiment 4 and 400 ppm with 0.1% lipase in Experiment 5) of 2wk. In all experiments, birds fed fresh fat gained more weight, had better feed/gain, together with higher AME$_{n}$ and apparent fat digestibility (Experiments 1 and 2) than birds fed oxidized fat(P<0.05). There was no interaction among fat sources and antioxidants on the performance of chicks in any experiment. In Experiment 3, Santoquin more than 200 ppm resulted in a reduction in weight gain and feed intake(P<0.05). The livers of chicks fed oxidized fat in Experiments 2 and 5 had higher malondialdehyde (MDA) values (P<0.05) Chicks fed oxidized fat with 250 ppm Santoquin in Experiment 2 had lower liver MDA values, although this situation did not occur in Experiments 1, 4, and 5. These results indicate that antioxidant supplements can alleviate most deleterious effects of feeding oxidized fat and that supplementation of Santoquin more than 200 ppm has a negative effect on the performance of broiler chicks.s.

• 한국임상수의학회지
• /
• 제22권2호
• /
• pp.125-129
• /
• 2005

This experiment was conducted for the development of oriental feed additives in broiler chicks. It conducted experiment to investigate the effect of $1\%$ dietary supplementation of oriental feed additives containing oriental herbal medicines such as Saururus Chnensis B.(S. chnensis) and Carthamus Tinctorius L.(C. tinctorius) on growth performance, and physicochemical properties in broiler chicks. The results of this study demonstrated that chicks feed $1\%$ oriental feed additives decreased feed gain, and death rates compared with control treatment. Weight gain and meat color were higher in the $1\%$ supplement group than control. The supplementation of $1\%$ oriental feed additives increased unsaturated fatty acid, and reduced crude fat in the broiler chicks compared with those of control. In conclusion, this study implied that oriental feed additives containing oriental herbal medicines such as S. Chnensis and C. Tinctorius were effective in improving broiler chicks on growth performance, physical-chemical properties and is highly recommended for increasing economic returns.

• Asian-Australasian Journal of Animal Sciences
• /
• 제30권8호
• /
• pp.1143-1149
• /
• 2017

Objective: The objective of the present study was to determine whether mango saponin (MS) could be used as a feed additive in broiler chicks by evaluating growth performance, carcass characteristics, meat quality, and plasma biochemical indices. Methods: A total of 216 1-d-old Arbor Acres male broiler chicks were randomly assigned into three dietary treatments supplemented with 0 (control), 0.14% (MS 0.14%), or 0.28% (MS 0.28%) MS. Each treatment had six replicates (cages) with 12 chicks each. The feeding trial lasted for six weeks. Results: Compared with the control, dietary supplemented with 0.14% or 0.28% MS increased average daily weight gain of chicks in the grower (22 to 42 d) and the whole (1 to 42 d) phases, and the final body weight of chicks on d 42 was higher in MS supplemented groups (p<0.05). Lower $L_{45min}{^{\star}}$ (lightness) and $L_{24h}{^{\star}}$ values, lower $b_{24h}{^{\star}}$ (yellowness) value, and higher $a_{45min}{^{\star}}$ (redness) and $a_{24h}{^{\star}}$ values of the breast muscle were observed in chicks fed with 0.28% MS on d 42 (p<0.05). The total antioxidant capacity in plasma increased in MS 0.14% group on d 21 (p<0.001). Lower contents of plasma total cholesterol and triglyceride were observed in chicks fed with 0.28% MS on d 21 and d 42, whereas the group supplemented with 0.14% MS only decreased plasma triglyceride content on d 21 (p<0.05). The glucose content in plasma decreased in MS 0.28% group on d 42 (p<0.001). Conclusion: Overall, MS could be used as a feed additive in broiler chicks, and the supplemental level of 0.28% MS in diet could improve growth performance, meat quality, and plasma lipid metabolism in broiler chicks.

• Asian-Australasian Journal of Animal Sciences
• /
• 제15권6호
• /
• pp.872-877
• /
• 2002

Two experiments were conducted to determine the effects of reducing particle size of corn from 1,000 to 500 ${\mu}m$ in simple and complex diets for nursery pigs and broiler chicks. In Exp 1., 192 nursery pigs were used in a 24 d growth assay. Treatments were: 1) 1,000 ${\mu}m$ corn in a simple diet; 2) 500 ${\mu}m$ corn in a simple diet; 3) 1,000 ${\mu}m$ corn in a complex diet; and 4) 500 ${\mu}m$ corn in a complex diet. Overall, pigs fed complex diets had 9% greater ADG (p<0.005) and 5% greater gain/feed (p<0.01) compared to pigs fed simple diets. Also, pigs fed the 500 ${\mu}m$ treatments had 3% better overall gain/feed than those fed the 1,000 ${\mu}m$ treatments (p<0.007). At d 9, apparent digestibilities of DM, N and GE were greater for complex diets and diets with smaller particle size (p<0.02). At d 23, there were no differences in nutrient digestibility resulting from diet complexity, but pigs fed diets with corn ground to 500 ${\mu}m$ had greater digestibility of DM (p<0.02) and GE (p<0.003) than pigs fed diets with corn ground to 1,000 ${\mu}m$. A second experiment was designed to determine if four days old broiler chicks were an acceptable model for predicting the effects of feed processing procedures on nursery pigs. Chicks fed complex diets had 3% greater gain/feed than chicks fed simple diets (p<0.001). Rate of gain and feed intake were improved by 3 and 2%, respectively, for chicks fed crumbled diets (p<0.03). However, there were several significant interactions among the main effects. For instance, crumbling did not affect gain/feed in chicks fed complex diets, but rate of gain and feed intake were increased by 7 and 6%, respectively, when simple diets were crumbled (diet complexity${\times}$diet form, p<0.001). Also, gain/feed of chicks was improved by 3% when particle size was reduced in meal diets, but not affected in chicks fed crumbles (diet form${\times}$particle size, p<0.005). Thus, our data suggested that reduction of particle size of corn was important for simple and complex diets and that a complex diet with 1,000 ${\mu}m$ corn gave no better performance than a simple diet with 500 ${\mu}m$ corn.

• 한국가금학회지
• /
• 제25권4호
• /
• pp.185-193
• /
• 1998

본 연구는 황기의 사료내 첨가·급여가 육계의 항병성, 생산성 및 계육의 품질에 미치는 영향을 구명하고자 시행하였다. 기초사료는 전기 3주와 후기 2주에 각각 21과 19％ 수준의 조단백질이 함유되었다. 시험설계는 황기의 첨가수준을 0, 0.25, 0.50, 1.00％로 4개의 처리구로 하였고, 처리구당 4반복으로 하였으며, 반복당 50수씩 800수를 이용하였다. 증체량, 사료섭취량, 사료요구율은 5주동안 매주 측정하였고, 시험 종료시에 혈액의 성상 및 계육의 지방과 단백질함량을 조사하였다. 황기 첨가구는 대조구에 비하여 성장에 영향을 미치지 못하였으나, 사료섭취량은 대조구에 비하여 현저하게 감소하였고(P<0.05), 사료효율은 0.25％첨가구에서 개선되는 경향을 보였다. 육계용 사료에 황기의 첨가수준이 증가함에 따라서 혈청 콜레스테롤과 AST는 감소하였으며, 헤마토크릿, 지방, 인과 BUN의 수준은 0.25％첨가구에서 감소하였다. 혈청 GH와 IGF-1은 0.50과 1.00％ 황기 급여구에서 대조구에 비하여 낮았다. 0.25와 0.50％황기 첨가구에서 가슴육의 지방과 단백질함량은 대조구에 비하여 증가하는 경향을 보였으나, 0.50％이상의 수준에서는 일관성이 없었다. 본 시험의 결과 육계용 사료에 황기의 적정 첨가수준은 0.25％이하에서 생산성과 항병성 및 계육의 품질을 개선할 수 있을 것으로 사료된다.

• Asian-Australasian Journal of Animal Sciences
• /
• 제9권3호
• /
• pp.349-354
• /
• 1996

An Experiment was conducted to evaluate the effects of dietary excessive chromium picolinate on growth performance, nutrient utilizability and the content of serum cholesterol, HDL cholesterol, glucose, triglyceride and non-esterified fatty acid in broiler chicks. Experimental diets based on corn-soybean meal were supplemented at 0, 800, 1,600 and 2,400 ppb chromium in the form of chromium picolinate. Each treatment had six replicates of six female chicks each (average initial weight=45.6 g). Experimental period lasted for six weeks. Excessive supplementation of chromium as chromium picolinate had no effect on body weight gain, feed intake, feed conversion and nutrient utilizability of broiler chicks. Mortality was improved with a supplementation of chromium (p < 0.05). However, serum glucose decreased as chromium level increased (p < 0.05). Up to 2,400 ppb chromium as chromium picolinate, signs of toxicity were not noticed in this study.

• 한국가금학회지
• /
• 제23권4호
• /
• pp.169-175
• /
• 1996

An experiment was conducted with male broiler chicks to determine the effect of different dietary phosphorus sources and evaluate the biological availability of phosphorus sources. The biological availability of phosphorus from dicalcium phosphate (DCP) was used as a reference standard (100%) compared to defluorinate phosphate (DFP). DCP and DFP was supplemented to a corn-soy basal diet at levels of 0.05, 0.15, 0.25, 0.35%. Each of 24 pens of 10 male broiler chicks with three replications was used for three weeks. The results indicated that weight gain, feed in-take, feed efficiency, nonphytic phosphorus (NPP) and tibia ash were significantly different among treatments. Dietary supplemental phosphorus of DFP improved weight gain, NPP intake and feed efficiency consistently, whereas supplements of DCP did not show consistent increase. Regression equations was used for the availability of DPP compared with DCP when percent bone ash was a function of total phosphorus in the diet. The percent (%) bone ash of DFP groups compared to that of DCP groups showed a value of 59.98% as a slope ratio. DFP indicated lower biological availability compared to DCP, but it's dietary supplementation tended to increase bone ash and maximize the growth of young broiler chicks.

• Ocean and Polar Research
• /
• 제28권2호
• /
• pp.201-207
• /
• 2006

We studied variation in clutch size, hatching, fledging and breeding success of the Black-tailed Gull (larus crassirostris) at Hongdo Island, which supported the largest breeding colony of the species, in South Korea in 1997 and 2000 to 2003. Cluck size was recorded in 1,388 nests and breeding success was estimated in 83 nests. Mean clutch size was 1.89 t 0.65. A total of 63.9% of the eggs hatched and 53.5% of the chicks survived until fledged. Breeding success was 34.2%. Causes of breeding failure were eggs missing (14.9%), rotten eggs (15.5%) and predation (2.4%) during the incubation period and chicks missing(35.8%), starvation (7.4%) and pecked chicks (3.2%) during the chick rearing period. In 2002, the main causes of breeding failure were eggs missing (17.2%) and rotten eggs (6.9%) during the incubation period and missing chicks (15.5%), starvation (3.5%) and pecked chicks (6.9%) during the chick rearing period. Most chick mortality occurred within three days after hatching.

• 한국가금학회지
• /
• 제26권3호
• /
• pp.195-201
• /
• 1999

The present study was conducted to investigate the effects of dietary supplemental dry powder of chinese medicine refuse (CMR) on the growth performance and physiological status of broiler chicks. The treatments consisted of corn-soybean meal control diet, CMR 4 and 8% diets. A total of 120 Arbor Acre broiler chicks were randomly allotted to 12 pens ; four pens per treatment and 10 birds per pen. The body weight gain and feed intake did not show ant differences among the treatment groups, but feed conversion was significantly higher (P〈0.05) in CMR 8% group than that of the control group. Hunt L and b did not show ant differences among the treatment groups, but hunt a was darker (P〈0.05) in CMR 4 and 8% group than that of the control group. The blood concentrations of total protein, sugar, glutamic-oxaloacetic-transaminase (GOT), glutamic-pyruvic-transaminase (GPT) Hemogloben were not different among the treatment groups. The pH of thigh muscle were lower in CMR 4 and 8% groups than that of the control group, but crude fat, crude ash of thigh muscle and bone hardness in brolier chicks did not show ant differences among the treatment groups. The saturated fatty acid content of the thigh muscle tende to decrease dietary CMR increased.