Recently, the use of antibiotics to improve animal productivity in livestock industry was strictly restricted. For these reason, probiotics have been regarded as one of promising materials for an antibiotic alternative. In this study, we investigated how the probiotics influences on the performance of broiler chicken via meta-analysis. Eighteen researches from 1997 to 2010 were used for meta-analysis. The standard summary effects were calculated via fixed effect model and random effect model (Borenstein et al., 2009). Heterogeneity was calculated by using the Cochran’s Q statistics (Kook et al., 2009) and publication bias was calculated via Egger’s regression (Lee et al., 2011). In fixed model average daily gain, body weight serum protein content and cecal LAB showed positive effect significantly. Feed intake, feed/gain and serum cholesterol showed significant negative effect. In serum triglyceride, negative effect was found but significance was not shown. In random model, average daily gain body weight and cecal LAB showed positive effects with significance and feed/gain and serum cholesterol represented significant negative effects. Publication bias was found only in feed/gain.

This experiment was conducted to investigate the effects of dietary supplementation of oriental herb extracts (Alpha PlusⓇ (AP)+Dried Foxglove Powder (DFP)) on growth performance and proliferation of splenocytes in broiler chicken raised under low or high density stocking conditions. A total of 240 male broiler chicks were randomly divided into four treatment groups with three replicates composed of ten birds in low density stocking groups and thirty birds in high density stocking groups. The four treatment groups were as follows: C1 (low density without AP and DFP); T1 (low density with AP 0.2% and DFP 0.03%); C2 (high density without AP and DFP); T2 (high density with AP 0.2% and DFP 0.03%). The feed intake of the high density stocking group was significantly lower than that of low density stocking groups during overall experimental period (p＜0.05). The body weight of high density stocking groups was lower than that of low density stocking groups (p＜0.05). The decrease of feed intake and body weight gain in growing stage (7~25day) under the high density stocking condition seems to be recovered in final stage (26~34day). Meanwhile dietary supplementation of AP+DFP in low and high density stocking groups tended to have higher daily body weight gain than control groups. The proliferation of splenocytes in treatment groups was significantly higher than control groups (p＜0.05). In conclusion, the result of the present study suggested that the oriental herb extracts (AP+DFP) could be used as an alternative feed additive resources to improve growth performance and immune activity in broiler chickens.

The potential of encapsulated inuloprebiotics from domestic Jerusalem artichokes (Helianthustuberosus) as natural antibacterial growth promotor for an antibiotic replacement in broiler chickens was presently assessed through assays of growth performance, serum immunoglobulin production and influence on caecal microflora. Two hundred-forty, 1-day-old, male broilers (Ross 308) were randomly allotted to four treatments (T1–T4), with three replicate pens per treatment and 20 chicks per pen. Broiler chicks were fed a basal diet (T1: control) or basal diet plus antibiotics (T2: Chlorotetracycline, 0.10%), 300 ppm of the inuloprebiotics (T3), or 450 ppm of the inuloprebiotics (T4) for 35 days. Body weight, dressing percentage or weight of breast and thigh muscles relative to carcass weight of T3 and T4 broiler chickens was significantly (P＜0.05) higher than T1 and T2 broiler chickens. The weight of abdominal fat from T3 and T4 broiler chickens were significantly (P

This study was conducted to evaluate effects of feeding earthworm meal on the meat safety and performance of broiler chicks. A total of 60 broiler chicks at 7 days of age were fed the commercial diet and water until 47 days of age, earthworm meal divided into three treatments, 0% (control), 0.4% (treatment-1) and 0.6% (treatment-2) of dry earthworm meal. The body weight gain and feed/gain tend to be increase fed a 0.4 to 0.6% than 0% of earthworm meal. The effects tended to be higher in 0.4% than 0.6% of earthworm meal. As, Cd, Cr, Hg and Pb were detected at level of 4.41, 1.23, 1.18, 0.00 and 3.39ppm in earthworm meal, respectively, but those were not detected in the chicken meat (breast and thigh meat). It was assumed that supplementing 0.4% of earthworm meal in the broiler diet, improved the performance of broiler chicks and it still did not affect meat safety.

The effect of feeding extracts from rhus trees on performance of broiler were performed to investigate development of natural antibiotic in process of broilers production. A total of 320 broiler chicks at 7 day of age were fed the commercial diet and water, water containing 0 ppm (control), 300 ppm (T1), 600 ppm (T2) and 1000 ppm (T3) of extracts from rhus trees for 7 weeks. The body weight gain and feed conversion ratio were improvement by feeding extracts from rhus trees at 7 to 21 days of age (P＜0.05), but amount of feed intake and mortality were not different among the four group. When 21 to 35 days of age, body weight gain, amount of feed intake, feed conversion ratio and mortality were almost same results when 7 to 21days of age, but it was not significantly different. When 35 to 49 days of age, body weight gain in T1 and T3 group was significantly improvement than control group (P＜0.05), also feed conversion ratio was improve by feeding extracts from rhus trees. There was a decrease in the microflora population of both E coli. and salmonella in the cecum contents and feaces in broilers by feeding extracts from rhus trees. Emission of ammonia and VFA gas from excreta were significantly decreased at 5 to 10 days of storaged period (P＜0.05). The digestibility of dry matter, crude fat, and crude ash of feed were tend to increased in broiler feeding extracts from rhus trees. Digestibility of crude protein of feed in broiler three treatmental groups was significantly improved (P＜0.05) as compared with those in control group. These results indicated that the feeding extracts from rhus trees of 300 to 1000 ppm of broiler production were improvement in the body weight gain, feed conversion ratio, and mortality due to increasing nutrients digestibility from feed, decreasing of microflora population of both E coli. and salmonella in the cecum contents and feaces, decreasing emission of ammonia and VFA gas from excreta.

A study was conducted to investigate the effect of supplementing earthworm meal on the growth performance and nutrient digestibility of feed in broiler chicks. A total of 120 broiler chicks at 7 days of age were fed the experimental diets containing 0%(Control), 0.2% and 0.4% of earthworm meal for 6 weeks. When fed on both starter and finisher diets, the body weight gain and amount of feed intake were significantly higher (P＜0.05) in the chicks fed 0.4% of earthworm meal than those fed 0% and 0.2% of earthworm meal. There were no significantly differences in feed conversion ratio and mortality among the treatments. When fed on both starter and finisher diets, digestibility of dry matter of feed was not affected by the dietary treatment, but crude fat and crude ash digestibilities of feed were tend to increased in chicks fed earthworm meal Digestibility of crude protein of feed in chicks fed 0.4% of earthworm meal was significantly(P＜0.05) improved as compared with those in 0.2% or control group. These results indicated that the dietary supplementations of 0.4% earthworm meal were effective in improve digestibility of crude protein of diet resulted improved broiler performance in broiler chicks.

당귀(當歸)와 시호근부(柴胡根部) 혼합분말을 육계사료(肉鷄飼料)에 0. 0, 0. 4, 1. 0, 2. 0%씩 첨가하여 6주간 급여한 결과는 다음과 같다. 당귀와 시호근부 첨가구의 사료섭취량(飼料攝取量)이 대조구보다 많았음을 볼때 기호성(嗜好性)은 좋게 평가되었다. 증체량(增體量)은 혼합제 1. 0% 첨가구에서 1,752g으로 대조구 보다 수당(首當) 130g 이상 높았다. 사료요구율(飼料要求率)은 1. 0% 첨가구에서 1. 85로서 대조구의 1. 99보다 유의하게 높았다(P < 0. 05) 도체량(屠體量)은 1. 0% 첨가구(1,261g)에서 높았으나 도체율은 0. 4% 첨가구에서 69. 48%로 높았다. 가슴살고기량은 0. 4% 첨가구에서 233g으로 대조구보다도 20g이상 더 높았다. 다리고기는 0. 4% 첨가구에서 대조구의 353g보다 50g이상 높았다. 당귀와 시호근부 첨가수준이 높아질 수록 간장(肝臟)의 중량이 무거워지는 경향이 있으며 비장(脾臟)과 심장(心臟) 및 근위(筋胃)의 중량과 복강과 근위주위 축적지방량(蓄積脂肪量)은 0. 4% 복합첨가구에서 높았다. 혈청(血淸) 총단백질(總蛋白質)과 혈청 총 콜레스테롤 및 트리글리세라이드 농도는 2. 0% 복합첨가구에서 높았으며 증체중이 높은 1. 0% 복합첨가구에서는 헐청 단백질과 콜레스테롤 및 트리글리세 라이드 농도가 낮은 경향으로 나타났다.

초생웅리(初生雄離)Hibreed Ross P. S 120 birds) 120수를 철제(鐵製) 케이지에서 6주간(1994년 6월 24일TEX〉~7월 4일) 수용하여, 전후기(前後期) 육계사료(肉鷄飼料)에 자호근부(紫胡根部)를 분말화하여 0.0, 0. 2, 0. 5, 1. 0 %씩 밀기율과 대체(代替)하여 급여한 결과를 요약하면 다음과 같다 1 자호근부(紫胡根部) 첨가부(添加區)의 사료섭취양(飼料攝取量)을 대조구보다 높게 나타나 기호성(嗜好性)은 좋았다. 2. 증체양(增體量)은 시호근부 1. 0% 첨가구에서 1, 845g으로 대조구의 1, 619g보다 수당(首當) 226g 높아14% 이상 증체효과(以上 增體效果)가 나타났다 3. 사료요구율(飼料要求率)은 대조구에서 2. 02로 가장 높았고 1. 0% 시호근부 첨가구에서 1.81로 유의(有意)하게 낮았다 (P〈0,01) . 4. 도체양(屠體量)은 시호근부 1.0% 첨가구에서 높았고, 도체율(屠體率)은 유의하게 향상되었다(P〈0. 01). 5. 가슴고기 생산량은 1.0% 시호근부 첨가구에서 253g으로 대조구보다 42g이 더 많았으머 생체중(生體重)에 대한 가슴고기량의 비율에서도 높았다. 6. 다리고기 생산량은 시호근부 첨가수준이 증가될수록 향상되는 경향을 보여 시호근부 1.O% 첨가구에서 높았으며 생체중에 대한 다리고기 비율도 우수 하였다. 7. 간장(肝臟), 비장(脾藏), 심장(心臟) 및 근위(筋胃)의 중량은 생체중이 무거울수록 각 장기 중량도 높아지는 경향으로 나탸나 시호근부 1.0% 첨가구에서 무거웠다. 8. 복경(腹經)과 근위주위(筋胃周圍) 축적 지방은 시호근부 1.0%첨가구에서 50.21g으로 높게 측정 되었다. 9. 혈청(血淸) 총(總) 단백질(蛋白質) 함량은 대조구예서 가장 높았고, 시호근부 첨가수준이 증가 할수록 감소되는 경향을 보여주었다. 혈청 cholesterol과 triglyceride 함량(含量)은 생체중에 대한 지방축적률(脂肪蓄積率)이 높아짐에 따라 이들의 함량도 증가되는 것으로 분석(分析)되었다.