| 2 | Effect of organic acids—essential oils blend and oat fiber combination on broiler chicken growth performance, blood parameters, and intestinal health显示文摘This study evaluated the effect of organic acids-essential oils blend with or without oat hulls(OH)on growth performance,organ weights,blood parameters,gut morphology,microbiota,and short-chain fatty acids(SC FA)in broilerchickens.Day-old broiler chickens were randomly allocated to 4 dieta ry treatments consisting of 1)a corn-soybean meal-wheat based diet(BAS),2)BAS+0.05%bacitracin methylene disalicylate(BMD),3)BAS+protected organic acids-essential oils at 300 g/1,000 kg of feed(OE),and 4)BAS+protected organic acids-essential oils at 300 g/1,000 kg of feed+3%OH(OEOH),in 8 replicate groups.Feeding was in starter(d0 to 14),grower(d 14 to 24),and finisher(d 24 to 36)phases.Body weight(BW),feed intake(FI),feed conversion ratio(FCR),and mortality were determined weekly.On d 36,8 chickens per treatment were sampled for blood biochemistry,organ weights,cecal SCFA production,and microbiota.Treatments had no effect on FI and FCR at all phases.Both OE and OEOH treatments reduced(P<0.001)the body weight gain of birds at the starter phase.Birds fed the OEOH treatment had higher(P<0.001)gizzard weight,while those offered the BMD diet showed a tendency(P=0.08)to have higher cecal weight.Birds in the OEOH treatment recorded increased ileal villus height and villus height-to-crypt depth ratio,as well as reduced duodenal crypt depth,while birds in the OE treatment had increased j ej unal villus height and villus height-to-crypt depth ratio.Both OEOH and OE treatments increased the number of goblet cells produced in the duodenum and jejunum.Treatments had no effecton SCFA concentrations.Birds in the OE treatment recorded the lowest concentration of blood urea(P=0.05)and cholesterol(P<0.05).Both OE and OEOH treatments increased(P<0.05)the relative abundance of potentially beneficial bacteria in the genus Firmicutesunclassified,Ruminococcus,Turicibacter,and Erysipelotrichaceaeunclassified,while reducing(P<0.001)the relative abundance of potentially harmful Coprobacillus.Conclusively,both protected organic acids-essential oils blend and its combination with oat fibers show potential as tools to achieve antibiotics reduction in broiler production. | Deborah I.Adewole Samson Oladokun Elizabeth Santin | 2021 | Animal Nutrition2021，，4： | 1 |
| 3 | 硒对家禽免疫反应的影响显示文摘硒对人和动物都是一种非常重要的必需微量元素。它能够抗氧化,清除免疫反应所产生的大量自由基。日粮中补硒是硒的主要来源,在家禽生产中,对营养需要量包括硒的计算是建立在试验基础之上的,在试验中,动物所受到的环境压力是较低的。然而在实际生产中,动物所处的环境是不同的,条件是严酷的,免疫程序复杂,因此动物免疫系统长期处于激活状态。很多研究表明,免疫激活反应会增加营养、维生素和微量元素的需要量。本文综述了硒对免疫反应的影响以及硒在家禽生产上的实际应用。 | 黄鑫 戴晋军 李彪 谭斌 李春松 Marina B.Saad Luiz R.Gertner Tania D.M.M.Bona Elizabeth Santin | 2013 | 国外畜牧学(猪与禽)2013，，3： | 1 |
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