• Asian-Australasian Journal of Animal Sciences
• /
• 제30권9호
• /
• pp.1303-1313
• /
• 2017

Objective: This study evaluated the change and function of the pancreas, and small intestine in relation to growth performance of broilers on diets supplemented with raw soybean meal (RSBM) and protease. Samples of test ingredients and diets, after mixing and prior to being used were also assessed on contents of anti-nutritional factors. Methods: A $3{\times}3$ factorial study was used, with three levels of RSBM (commercial soybean meal [SBM] was replaced by RSBM at 0, 10%, or 20%) and protease (0.1, 0.2, or 0.3 g/kg). Each treatment was replicated six times with nine birds per replicate. Birds were housed in cages, in climate-controlled room and fed starter, grower and finisher diets. Results: Levels of trypsin inhibitors in the diets, containing varying levels of RSBM ranged between 1,730.5 and 9,913.2 trypsin inhibitor units/g DM. Neither RSBM nor protease supplementation in diets significantly affected (p>0.05) the body weight of broilers in the entire periods (0 to 35-d). Increasing the level of RSBM in diets increased the weight of the pancreas at d 10 (p<0.000), d 24 (p<0.001), and d 35 (p<0.05). Increasing levels of RSBM in the diets reduced the apparent ileal digestibility of crude protein (CP), and amino acid (AA) at d 24. Increasing level of RSBM in the diets decreased (p<0.01) pancreatic protein content, but this was increased (p<0.05) when protease was added to the diets (0 to 10-d). Increasing the level of protease improved the pancreatic digestive enzymes, including trypsin (p<0.05), chymotrypsin (p<0.01), and general proteolytic enzymes (p<0.05). Conclusion: The commercial SBM could be replaced at up to 20% by RSBM for broilers. Although protease supplementation slightly improved the digestive enzymes, and the ileal digestibilities of CP and AA, the CP and AA were negatively affected by increasing RSBM.

• Asian-Australasian Journal of Animal Sciences
• /
• 제14권9호
• /
• pp.1228-1232
• /
• 2001

Forty five Soviet Chinchilla rabbits weaned at 35 d of age were fed 5 experimental diets prepared by using oat plant meal ($T_2,\;T_4$) and tall fescue hay ($T_3,\;T_5$) at 25% and 50% level along with control ($T_1$). The gain in body weight at 84 d of age decreased with test material substitution, however, the differences were non significant when compared with oat plant meal and were significant (p<0.05) with tall fescue hay at both the levels. Feed conversion ratio also deteriorated with test material and its increasing proportion and the differences were significant (p<0.05). The performance-index calculated were 42.1, 36.7, 29.4, 33.3 and 18.8 in $T_1,\;T_2,\;T_3,\;T_4$ and $T_5$, respectively. Digestibility of all the organic nutrients decreased significantly (p<0.05) with test material incorporation, as a result nutritive value of the test diets decreased linearly. Nitrogen balance as per cent of intake was higher in oat plant meal substituted diet compared to tall fescue substituted diet. Cost per kg live weight gain was lowest with 50% oat plant meal followed by 25% oat plant meal incorporation. It was highest with tall fescue hay substitution. Nutritive value of oat plant meal as calculated was DCP 5.1%, TDN 35.8% and that of tall fescue hay was DCP 6.5%, TDN 30.8%. Thus, oat plant meal can be substituted safely up to 25% in the feeding regime of weaner rabbits whereas, for tall fescue hay the safe limit is below 25% level and needs to be ascertained.

• Asian-Australasian Journal of Animal Sciences
• /
• 제18권4호
• /
• pp.516-523
• /
• 2005

The experiment was conducted to study the effect of dietary combinations of vitamin A (VA), vitamin E (VE) and methionine (Met) on growth performance, meat quality and immunity in commercial broilers. Ross chicks (n=3,630) were allocated to five experimental treatments with three replicates per diet. The dietary treatments were: VA 8,000 IU, VE 10 IU (diet 1); VA 12,000 IU, VE 10 IU (diet 2); VA 8,000 IU, VE 100 IU (diet 3); VA 12,000 IU, VE 100 IU (diet 4) and; VA 12,000 IU, VE 100 IU/kg diet and 20% Met higher than other groups (diet 5). The Met content in diet 1 to diet 4 were as per the requirement suggested by NRC. Separate vitamin premixes were prepared for each treatment diet as per the requirement of study. The 35 d study revealed significantly (p<0.0001) higher weight gains in broilers fed diet 3 and diet 5, than in the rest of the groups during starter phase (0-3 weeks) only. The feed intake did not vary significantly at all phases of study, but feed efficiency was significantly (p<0.05) lower in diet 1 during starter and overall phase (4-5 weeks). The bone strength and bone composition, except bone calcium, remained unaffected due to experimental diets studied after 35 d of experimental feeding. The thio-barbituric acid reactive substances (TBARS) were significantly (p=0.0013) lower in the breast meat in group 5, followed by group 3, than in the rest of the groups. The immune studies conducted, antibody titers to sheep red blood cells, thickness index to phytohaemagglutinin-P, and heterophil: lymphocyte ratio, did not show any significant difference among treatments. It could be concluded that supplementation of VA, VE and Met at higher levels could be beneficial to broilers only during the starter phase.

• 한국가금학회지
• /
• 제12권2호
• /
• pp.135-143
• /
• 1985

관절염(또는 건초담), 발육부전증을 보이는 12주령 이하의 브로일러 종계와 브로일러에서 8주의 바이러스를 분리하여 avian reovirus로 동정하였다. 부리된 reovirus는 전자현미경에서 이중막을 갖는 구형으로 virion의 직경은 81nm였으며 한천겔침강반응에서 기지의 reovirus(S-1133 주) 및 항혈청(항 S-1133주 및 R-1주)과 반응하였다. 분리된 revirus는 혈구응집능력이 없었으며 chloroform, IUdR 및 열처리(56$^{\circ}C$, 30분)에 강한 저항성을 나타내었다. Reovirus의 감염성 측정시 계 태아섬유아세포 및 가세포배양과 Vero cell 배양에서 세포분주와 동시에 바이러스를 접종하거나 단층세포가 형성된 후접종하거나 간에 별다른 차이없이 감염 4-5일후에 end point에 도달되었다. 분리된 reovirus를 계태아간세포배양에 5-10대 계대배양한 후 $10^{5.0}$ TCI $D_{50}$의 바이러스를 10일령 발육계란의 장요막상에 접종하였을 때 평균치사시간이 국내분리주는 54-59시간인데 반하여 S-1133주는 73시간으로 약간 길었다.

• 농업과학연구
• /
• 제46권3호
• /
• pp.559-567
• /
• 2019

This experiment was conducted to investigate the effects of pig skin collagen supplementation on growth performance, organ weight, blood characteristics, and intestinal microbiota in broilers. A total of 50 Ross 308 broilers were used for 2 weeks. The five dietary treatments were as follows: NC) basal diet, PC) NC + fish collagen powder 0.1%, T1) NC + pig skin collagen 0.1%, T2) NC + pig skin collagen 0.5%, and T3) NC + pig skin collagen 1.0%. The body weight gain (BWG), feed intake (FI), and feed conversion ratio (FCR) were not affected (p > 0.05) by the dietary treatments in this experiment. Additionally, there were no significant differences (p > 0.05) in the organ weights among the treatments. Broilers fed T1, T2 and T3 diets had higher (p < 0.05) white blood cell (WBC) counts than the broilers fed the NC and PC diets. The Lactobacillus counts in the excreta were improved (p < 0.05) in the broilers fed the T1 and T2 diets. Moreover, the Salmonella counts in the excreta were decreased (p < 0.05) in the broilers fed the PC and T1 diets. In conclusion, supplementation of pig skin collagen in diets improved the white blood cells (WBCs) in the blood and Lactobacillus counts in the excreta, and reduced the Salmonella counts in the excreta. However, when pig skin collagen was increased in the diets, there were no significant differences (p > 0.05). Therefore, the addition of 0.1% pig skin collagen in the feed provided beneficial effects on the blood characteristics and the intestinal microbiota environment.

• Animal Bioscience
• /
• 제34권7호
• /
• pp.1157-1168
• /
• 2021

Objective: The aim of this study was to investigate the effects of different amounts of wheat bran (WB) inclusion and postbiotics form by Saccharomyces cerevisiae and phytase co-fermented wheat bran (FWB) on the growth performance and health status of broilers. Methods: Study randomly allocated a total of 300 male broilers to a control and 4 treatment groups (5% WB, 5% FWB, 10% WB, and 10% FWB inclusion, respectively) with each pen having 20 broilers and 3 pens per treatment. Results: The WB does not contain enzymes, but there are 152.8, 549.2, 289.5, and 147.1 U/g dry matter xylanase, protease, cellulase and β-glucanase in FWB, respectively. Furthermore, FWB can decrease nitric oxide release of lipopolysaccharide stimulated chicken peripheral blood mononuclear cells by about two times. Results show that 10% FWB inclusion had significantly the highest weight gain (WG) at 1 to 21 d; 5% FWB had the lowest feed conversion rate at 22 to 35 d; 10% WB and 10% FWB inclusion have the highest villus height and Lactobacillus spp. number in caecum; and both 5% and 10% FWB can increase ash content in femurs. Compared to control group, all treatments increase mucin 2, and tight junction (TJ), such as occludin, claudin-1, zonula occludens-1, and mRNA expression in ileum by at least 5 folds. In chicken peripheral blood mononuclear cells, nicotinamide adenine dinucleotide phosphate-oxidase-1 mRNA expression decreases from 2 to 5 times, and glutamate-cysteine ligase catalytic subunit mRNA expression also increases in all treatment groups compared to control group. The mRNA expression of pro-inflammatory cytokines, including interleukin-6 (IL-6), nuclear factor-κB, and IL-1β, decreases in 5% and 10% FWB groups compared to control group. Conclusion: To summarize, both WB and FWB inclusion in broilers diets increase TJ mRNA expression and anti-oxidation and anti-inflammation, but up to 10% FWB groups have better WG in different stages of broiler development.

• Asian-Australasian Journal of Animal Sciences
• /
• 제22권4호
• /
• pp.471-482
• /
• 2009

Nutrient availability may control muscle growth directly and indirectly through its influence on regulatory factors. We analyzed the effects of nutrient availability on the breast muscle insulin-like growth factor system. Real time RT-PCR was used to quantify the level of transcription in breast muscle from Langshan (LS) layer and Arbor Acres (AA) broiler chickens subjected to different feeding regimens during embryonic and postnatal development. The AA chickens were fed AA diet (AA, control group) while the LS chickens were either fed LS diet (LL) or AA diet (LA). According to our results, insulin-like growth factor (IGF)-II (embryonic day 16 (E16) - postnatal day 42 (P42)), IGF-I receptor (IGF-IR, E18-P42), and IGF binding protein (IGFBP)-2 (E18-P42), -5 (E16-P14), -7 (E12-P0), and -3 (E12-P0) were positively correlated with IGF-I, while IGFBP-3 (P0-P28) was negatively correlated with IGF-I. In comparison, IGF-IR (E18-P42), IGFBP-2 (E18-P42), IGFBP-5 (E14-P0), and IGFBP-3 (E16-P0) were positively correlated with IGF-II, while IGF-IR (E10-E16) and IGFBP-3 (P0-P28) were negatively correlated with IGF-II. Moreover, IGFBP-2 (E16-P42), -7 (E10-E16), and -3 (E10-E16) were positively correlated with IGF-IR, while IGFBP-3 (P0-P28) was negatively correlated with IGF-IR. Finally, IGFBP-7 (E12-P0) was positively correlated with IGFBP-3, while IGFBP-2 (P0-P28) and -7 (P0-P42) were negatively correlated with IGFBP-3. Overall, the AA chickens exhibited higher levels of IGF-I, IGF-IR, and IGFBP-2 mRNA expression than the LL chickens, while the opposite was true for IGFBP-7. No strain differences in IGF-I, IGF-IR, and IGFBP-7 mRNA expression were detected between LA and AA chickens; however, a strain difference was observed for IGFBP-2. LA chickens exhibited higher levels of IGFBP-2 than LL chickens, while the opposite was true for IGFBP-7. Our data show the first evidence that certain genes may be correlated during specific developmental periods and that strain differences in the expression of those genes in LS and AA chickens are due to differential responses to the same diet.

• 한국가금학회지
• /
• 제8권1호
• /
• pp.7-14
• /
• 1981

여름철 고온다습기에 사료를 저장시 문제되는 미생물의 증식과 사료의 영양가 손실이 부로일러의 성장 및 사료효율에 미치는 영향을 구명하기 위하여 수분함량이 낮은 저수분사료(수분 12%)와 수분함량이 높은 고수분사료(수분 15%)에 항곰팡이제인 Sorbic acid를 0.02%와 0.04% 그리고 Ca-Pro-pionic acid를 0.1%와 0.2% 첨가하여 Anak계부로일러로 실험하여 다음과 같은 성적을 얻었다. 1. 항곰팡이제는 호기성이나 염기성세균 보다 곰팡이나 효모의 증식 억제에 효과가 있었으며 특히 수분 15%에서는 Sorbic acid 0.04% 첨가가 억제효과가 가장 컷다. 2. 수분 15%인 분쇄옥수수의 전분손실은 14% 정도이었으나 항곰량이제를 첨가하므로서 3-7%로 크게 낮아졌으며, Sorbic acia가 Ca-propionic acid보다 효과적이었다. 3. 지방함량 손실은 고수분구에서 15% 였으나 Sorbic acid 0.04% 첨가로 Ca-propionic acid보다는 지방손실은 7%로 줄일 수 있었다. 4. 부로일러 전기의 증체량을 저수분구에 Sorbic-acid를 첨가한 것은 타구에 비하여 유의적으로 높았고 고수분구에 항곰팡이제 무첨가구와 Ca-propionic acid 0.1% 첨가구는 타구에 비해 유의적으로 낮았다 (P＜0.05). 5 전기의 사료효율은 고수분구에 항곰팡이제 무첨가구에서만 유의적으로 낮았으나(P＜0.05) 항 곰팡이제의 종류나 수준 그리고 수분의 고, 저에는 유의차가 인정되지 않았다. 6. 부로일러후기의 증체량은 고수분구에 항곰팡이제 무첨가구는 유의적으로 낮았고. 저수구분에 Sorbic acid 0.04% 첨가구는 고수분구에 Ca-propionic acid 0.1%와 저수분에 Ca-propionic acid 0.1% 첨가구에 비해서 유의적으로 좋았다 (P＜0.05). 7. 후기의 사료효율에 있어서 고수분구에 함곰장이제 무첨가구는 유의적으로 낮았으며 저수분구에 Sorbic acid 0.02%와 0.04% 첨가가 저수분구에 Ca-Propionic acid 0.1%와 0.2% 첨가보다 유의적으로 높았다 (P＜0.05) 8. 장내 징생물 변화는 소장보다 맹장에서 세균이나 곰팡이가 많았고 세분함량에 의한 장내미생물의 차이는 없었으나 항곰팡이제 첨가는 장내에서 곰팡이 억제효과가 있었다. 9. 수분 15% 기타 대조구에서 뇌 연화증 이 발생하였으며 기타구에서는 별다른 이상이 없었다. 이상의 시험결과 하절기 고수분사료에는 Sorbic acid 0.04%나 CP 0.2%를 첨가하거나 사료의 수분함량을 12% 이하로 낮추는 것이 부로일러 성장과 사료효율 증진에 유효하다고 사료된다.

• 한국가금학회지
• /
• 제41권3호
• /
• pp.165-171
• /
• 2014

본 실험에서는 Cu-soy proteinate(Cu-SP)와 Herb-Mix(HBM)을 단독 또는 혼합 급여가 육계의 생산성, 혈액 성상, 면역 및 분내 미생물에 미치는 영향을 조사하기 위해 실시하였다. 육계(Ross308) 1,000수를 공시하여 5처리 4반복으로 반복 당 50수씩 완전 임의 배치하여, 자유 섭식하게 하였으며, 35일간 전기(0~21일), 후기(22~35일)로 나누어 실시하였다. 처리구들은 대조구(Control : negative control), 항생제구(Antibiotics : avilamycin 6 ppm 첨가구), Cu-SP(Cu-soy proteinate로 Cu 100 ppm 첨가구), HBM(지황 10%, 산약 10%, 당귀 20%, 오미자 5%, 감초 5%, 천궁 10%) 0.15% 첨가구, Cu-SP + HBM(Cu-soy proteinate로 Cu 100 ppm 첨가구 + HBM 0.15%) 첨가구 총 5 처리구였다. 35일의 사양 시험 결과, 전기 기간(0~21일)은 증체량, 사료 섭취량, 사료 요구량, 폐사율은 처리구 간에 유의적인 차이는 나타나지 않았다. 반면, 후기 기간(22~35일)에 사료 섭취량과 사료 요구량은 대조구가 유의적으로(P<0.05) 높았다. 전 기간(0~35일)에 증체량은 첨가구들이 유의적으로(P<0.05) 높았다. 반면, 사료 섭취량, 사료 요구량은 첨가구들이 유의적으로(P<0.05) 낮았다. 림프구(LY)는 Cu-SP + HBM구가 유의적으로(P<0.05) 높았으며, HE : LY 비율은 대조구가 유의적으로(P<0.05) 가장 높았다. 혈장 IgG 함량은 HBM 첨가구들이 유의적으로(P<0.05) 높았다. 혈장 IgA 함량은 처리구 간에 유의적인 차이는 나타나지 않았다. 유해균인 Cl. Perfringens는 대조구가 유의적으로(P<0.05) 높았으며, E. coli와 Lactobacillus는 처리구 간에 유의적인 차이는 나타나지 않았다. 결론적으로 Cu-SP와 HBM의 단독 급여나 혼합 급여는 둘 다 생산성을 증가시키며, 면역성상을 개선시키는 역할을 한다. 또한 소장 내 유해 미생물을 억제하는 긍정적인 효과를 보여주었다.

• 한국가금학회지
• /
• 제15권1호
• /
• pp.1-19
• /
• 1988

본 연구는 한국재래오골계의 품종보존과 육종개량을 위하여 주요 경제형질중의 하나인 산육능력을 규명하고자 천연기념물 265호로 지정된 연산오골계 총 300수를 공시하여 4주까지는 육계전기식료, 5주부터 16주까지는 육계후기사료로 사육하였다. 조사항목은 체중, 증가율, 가식부와 불가식부의 중량 및 비율, 흉부와 퇴경부의 체형 등이며, 나타난 결과를 요약하면 다음과 같다. 1) 재동오골계의 체중은 6주령부터 암수간에 유의한 차이를 나타내었다. 수컷과 암컷의 기중은 8주령 $659.0{\pm}154.9$와 $588.3{\pm}68.0$g이었고, 10주령시 $938.1{\pm}72.6$, $810.1{\pm}104.4$g이었다. 암수의 평균체중은 8주령 $623.7{\pm}121.9$, 10주령 $874.1{\pm}109.4$g으로 나타났다. 2) 증체율은 암수간에 큰 차이가 없었고, 암수의 평균증체율은 2~4주, 4~6주, 6~8주, 8~10주에 각각 166%, 106%, 41% 그리고 40%로 나타났다. 3) 총가식부의 증가양상은 12주령까지 암수 모두에서 고도로 유의하게 증가하였고 성간에는 6주령부터 익부, 배부 퇴경부 및 총가식부의 중량은 8주와 10주령시 수컷은 $395.4{\pm}98.5$와 $597.54{\pm}7.25$이고 암컷은 $355.6{\pm}42.0$과 $518.7{\pm}69.7$g이었다. 암수 평균총가식부 중량은 8주와 10주령시 각각 $375{\pm}72.7$g이었고 체중에 대한 비율은 60~63%정도로 나타났다. 4) 가식내장의 체중에 대한 비율은 8주와 10주령시 암수간에 큰 차이가 없었고, 암수 평균은 4~6%정도로 나타났다. 5) 불가식부의 체중에 관한 비율은 주령이 경과함에 따라 점차 낮아지는 경향을 보였고, 암수간에는 비슷한 비율을 나타내었다. 암수평균한 8주령시 비율은 혈액 4%, 우모 7%. 불가식내장 12% 그리고 총불가식부 31%를 차지하였다. 6) 흉부와 퇴경부 체형구성요소들에서는 흉각과 각경을 제외하고는 10주령까지 유의하게 증가하였고, 8주와 10주령시 암수간에는 흉위, 흉골장, 퇴경부 둘레 및 각경에서 유의한 차이가 있었다. 7) 체중과 가식부중량에 대하여 체형구성요소중에 흉위와 퇴경부 둘레가 유의한 상관을 나타내었고, 체중구성요소중에는 가식부의 비율들이 체중에 밀접한 상관관계를 보였으며 특히 흉부와 퇴경부의 비율과 총가식부비율간에는 고도로 유의한 상관관계를 나타내었다.