日粮添加复合甘草素对肉鸡生长性能和免疫功能的影响

文章旨在探究日粮添加复合甘草素对肉鸡生长性能和免疫功能的影响。试验将磷酸化甘草多糖和甘草提取物混合制成复合物，为复合甘草素（FGS）。试验选用180只1日龄未免疫健康白羽肉鸡，随机分为4组，每组45只，常规免疫新城疫疫苗。其中，3个试验组分别在基础饲粮中添加低、中、高3种剂量的复合甘草素，下文记为FGSL、FGSM、FGSH组，对照组采用常规日粮饲养。试验过程于第7、14、21、28、35天采样，检测体重、血清抗体效价、血清细胞因子含量、sIgA和IL-17含量的变化。结果表明，体重方面：在D7、D21，FGSM组的体重显著高于对照组（P＜0.05），在D35，FGSL和FGSM组体重高于对照组，但无显著差异（P＞0.05）|血清抗体效价变化方面：在各时间段，试验组效价最高，D7各组差异不明显（P＞0.05），但D21、D28、D35，试验组抗体效价均高于对照组（P＜0.05）|在血清细胞因子含量变化方面：在D14、D21、D28，FGSL、FGSM和FGSH组血清IFN-γ含量显著高于对照组（P＜0.05），在D7、D21，FGSL、FGSM和FGSH组的血清IL-2含量高于对照组，但无显著差异（P＞0.05），在D28、D35，FGSL、FGSM和FGSH组的血清IL-2含量显著高于对照组（P＜0.05）|在十二指肠洗液sIgA和IL-17含量变化方面：在D7、D14、D28和D35，FGSL、FGSM和FGSH组血清sIgA含量显著高于对照组（P＜0.05），在D28、D35，FGSL、FGSM和FGSH组的血清IL-17含量显著高于对照组（P＜0.05）。结论：日粮添加复合甘草素能有效增强肉鸡生长性能和免疫功能。 [关键词]复合甘草素|肉鸡|生长性能|免疫功能     

体育运动员的训练及膳食营养摄入研究

运动与营养是一个专业运动员必须兼顾的训练因素,专业的体育运动员在高强度的训练下身体机能的消耗比普通人高,如果没有进行相对应的膳食营养摄入,运动员就如枯草一般处于虚脱的状态,有很大可能还会危及性命。运动也是普通人追求美好生活的基本项目,在现代生活节奏日益加快的时代,运动员身上所具备的运动精神深深影响了运动群体,在向往美好生活的过程中,许多人会根据运动员基础性的运动项目进行锻炼,在膳食营养上也会参考体育运动员的营养摄入基本指标。     

UPLC-MS/MS法测定禽蛋中8种氟喹诺酮类兽药残留

为建立禽蛋中8种氟喹诺酮类兽药残留检测的超高效液相色谱-串联质谱(UPLC-MS/MS)测定方法,我们将匀浆后的样品用1%甲酸酸化乙腈溶液提取,经涡旋、超声、离心、氮吹、过滤一系列操作后,在UPLC-MS/MS上测定。结果表明,测定8种氟喹诺酮类兽药在2~50 ng·mL^-1时线性关系良好。在低、中、高3个加标水平下的回收率为70.25%~113.67%,相对平均偏差小于12%。本研究表明,UPLC-MS/MS法测定8种氟喹诺酮类方法操作简便,提取步骤简单,可实现8种氟喹诺酮类兽药残留的快速检测。     

新文科课程思政建设的主旨:关切、确切和亲切

新文科课程思政建设是为了适应新时代发展和更好落实立德树人的需要。新文科建设必须以课程思政作为提升内涵建设的重要内容,而课程思政建设则为新文科铸魂。新文科课程思政建设的主旨可概括为"三切"即关切、确切和亲切。也就是说,新文科课程思政建设要着力加强辩证唯物主义和历史唯物主义教育,帮助大学生深刻领会习近平新时代中国特色社会主义思想的丰富内涵、历史地位和重大意义,教育引导大学生树立正确的世界观人生观价值观,争做民族伟大复兴的时代新人。     

甜瓜枯萎病发病规律分析与防治措施

<正>甜瓜(Cucumis melon L.)几乎在世界各国都有种植,是营养丰富、品味独特的食用佳品。但多种病害的发生严重影响着甜瓜的品质和产量。甜瓜枯萎病(Fusariumwilt)是一种世界性的甜瓜病害,遍布整个欧     

课程思政与专业课程融合的探索和实践——以兽医临床诊疗技术为例

以兽医临床诊疗技术为例，对课程思政体系构建、课程思政元素发掘、专业课程与课程思政的融合等方面进行了探索和实践。通过在专业课中开展思政教育，学生的学习积极性、专业素养、思想政治觉悟得到了全面提升。课程思政和专业课程的有机融合在培养社会主义建设者和接班人的过程中发挥了积极的作用。     

西南地区抗旱保春耕成效显著

2009年冬2010年春,西南地区发生历史罕见的特大旱灾,造成小春作物严重受灾,并给大春生产造成前所未有的困难.据农业部农情调度,旱情最严重时(3月30日),云南、贵州、广西、重庆、四川5省(区、市)小春作物受旱面积达504.1万hm2,其中严重受旱298.5万hm2、绝收142.3万hm2.水稻育秧、栽秧和旱地作物播种普遍推迟,进度明显慢于2009年同期.对此,党中央、国务院高度重视,"两会"以后国务院连续4次召开专题会议,对抗旱春播工作做出具体部署,提出明确要求.温家宝总理、回良玉副总理等中央领导同志多次深入云南、贵州、广西等重旱区考察指导抗旱工作.     

碳晶烤房内气体及烤后烟叶的挥发性成分研究

本研究以燃煤烤房为对照，采用固相微萃取-气相色谱/质谱(SPME-GC/MS)联用检测手段及PLS-DA等分析方法研究碳晶烤房对烤房内气体和烤后烟叶中挥发性成分的影响。结果表明：与燃煤烤房相比，碳晶烤房气体中新植二烯、苯甲醛、正十一烷、正十二烷、正二十烷含量极显著降低(P<0.01),占比分别降低2.869、0.089、0.186、0.266个和0.309个百分点；碳晶烤房烤后烟叶中烟碱含量降低4.377个百分点，新植二烯、西柏三烯一醇、苯乙醛含量极显著增加(P<0.01),分别增加3.152、0.017、0.057个百分点。碳晶烤房烤后烟感官评吸质量总分为72.8分，比燃煤烤房提高2.8分，主要在香气质、香气量、余味方面有所提升。综上，碳晶烤房内气体与烤后烟叶中挥发性成分与燃煤烤房存在差异，且烤后烟叶感官评吸质量明显提升，碳晶烤房能够通过减少烘烤过程中烟叶挥发性成分的挥发损耗进而提升烟叶品质。     

MCC950 Improves Growth Performance, Ｕric Acid Metabolism and Kidney Injury of Goslings Fed High Protein Diet by Inhibiting Nucleotide Binding Oligomerization Domain-Like Receptor 3 Inflammasome北大核心CSCD

The aim of this study was to evaluate the effects of MCC950 on growth performance, uric acid metabolism, serum inflammatory factor contents and kidney injury of goslings a fed high protein diet, and explore the potential mechanism of nucleotide binding oligomerization domain-like receptor 3 (NLRP3) / cysteine aspartase-1 (Caspase-1) signaling pathway in gosling gout. A total of 120 Yangzhou goslings of 1-day-old were randomly divided into 3 groups, which were control group, high protein group (HP group) and high protein+ MCC950 group (HP+MCC950 group), with 5 replicates in each group and 8 goslings in each replicate. The control group was fed a normal protein diet with 16.5% crude protein, and the HP group and HP+MCC950 group were fed a high protein diet with 24.0% crude protein. The HP+MCC950 group was intraperitoneally injected with MCC950 every 3 days at a dose of 10 mg / kg BW, and the other two groups were injected with the same amount of normal saline. The experiment lasted for 15 days. The results showed as follows: 1) compared with the control group, the average body weight of goslings at 15 days of age in the HP group was significantly decreased (P<0.05); the serum contents of uric acid (UA), creatinine (Cr), urea nitrogen (UN), C-reactive protein (CRP), interleukin-1β (IL-1β), interleukin 18 (IL-18), interleukin 6 (IL-6), tumor necrosis factor α (TNF-α) and transforming growth factor β1 (TGF-β1) in the HP group were significantly increased (P<0.05); the mRNA relative expression levels of NLRP3, Caspase-1, IL-1β and IL-18 and the protein relative expression levels of NLRP3, Caspase-1 and IL-1β in kidney tissues in the HP group were significantly increased (P<0.05). 2) Compared with the HP group, the average body weight of goslings at 10 and 15 days of age in the HP+MCC950 group was significantly increased (P<0.05); the serum contents of UA, Cr, UN, CRP, IL-1β, IL-18, IL-6, TNF-α and TGF-β1 were significantly decreased (P<0.05), while the mRNA relative expression levels of NLRP3, Caspase-1, IL-1β and IL-18 and the protein relative expression levels of NLRP3, Caspase-1 and IL-1β in kidney tissues in the HP+MCC950 group were significantly decreased (P< 0.05). 3) Histological findings showed that the renal tubules of goslings were dilated, and vacuolar degeneration and necrosis occurred in the HP group, while the structure of renal tubules was relatively normal in the HP+MCC950 group. The urate deposition area in kidney tissues of goslings in the HP group was significantly larger than that in the control group (P<0.05), and which in the HP+MCC950 group was significantly smaller than that in the HP group (P<0.05). Moreover, the urate deposition area in kidney tissues of goslings was significantly positively correlated with the protein relative expression level of NLRP3 (r = 0.681, P<0.05). In conclusion, MCC950 can promote the growth of goslings fed a high protein diet and reduce the serum uric acid content, which may be related to the reduction of inflammatory response and kidney injury through its inhibition of NLRP3 / Caspase-1 signaling pathway. © 2023 Authors. All rights reserved.     

丘北县半夏无公害栽培技术

文章总结了丘北县半夏无公害栽培技术，包括品种选择、地块选择、播种技术、田间管理、主要病虫害的无公害防治、适时采收、产品问题及注意事项，以期为种植户提供参考，建立标准化的种植模式。