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关键词： 媒介学   播音课程   思政融入   中华民族共同体意识  

摘要： 随着媒介融合时代的到来，高校播音课程在培养专业技能的同时，亟需承担起中华民族共同体意识传播的责任。基于媒介学视角，本研究探讨了该课程中思政教育的融入策略，重点分析了课程内容优化、教学方法创新、融媒体技术应用以及评价反馈机制的构建，以增强学生的社会责任感和舆论引导能力。研究发现，跨学科融合、构建校内外协同育人机制及推动数字化升级，可以有效提升思政教育的传播力和影响力，提升传媒人才培养与时代的适配性，推动中华民族共同体意识在传媒行业中的广泛传播。

关键词： digestive enzymes   feed domestication   immune   intestinal microorganism   Siniperca chuatsi  

摘要： This study aimed to compare and analyze the differential effects of formulated feed versus live bait feeding on the digestive function, immune capability, and intestinal microbial composition of Siniperca chuatsi. Six net cages were set up in the culture pond with 200 Siniperca chuatsi fingerlings in each cage. Three cages served as the formulated feed group fed commercial mandarin fish formulated feed, while the other three cages served as live bait group fed silver carp fingerlings. Through 5 months feeding experiment, the digestive enzyme activities in stomach, liver and gut, serum biochemical indexes, intestinal microbial composition of Siniperca chuatsi were examined. The results showed as follows: in stomach, the pepsase activity of Siniperca chuatsi in the formulated feed group was significantly lower than that in the live bait group (P < 0. 05) . Although the gastric mucosa structure remained basically intact, the gastric glands exhibited a trend of atrophy. In gut, both trypsin and cellulase activities in the formulated feed group were significantly lower than those in the live bait group (P<0.05) . No obvious damage was observed in the gut of both groups, but the number of goblet cells in the formulated feed group increased. In liver, however, the trypsin activity of Siniperca chuatsi in the formulated feed group was significantly higher than that in the live bait group (P<0.05), and no obvious damage was observed in the liver tissues. For serum biochemical indexes, the activities of lysozyme and alkaline of Siniperca chuatsi in the formulated feed group were significantly higher than those in the live bait group (P<0.05), and the serum albumin content in the formulated feed group was significantly lower than that in the live bait group (P < 0. 05) . Additionally, intestinal microbial composition analysis revealed that Mycoplasma was the dominant bacterium in the formulated feed group, while Acinetobacter was dominant bacterium in the live bait group. The

关键词： cecal microbiota   growth performance   immune function   Plantago asiatica polysaccharide   yellow-feathered broilers  

摘要： This study aimed to investigate the effects of Plantago asiatica polysaccharide (PLP) on the growth performance, organ development, immune function and cecal microbiota of yellow-feathered broilers. Four hundred 1-day-old healthy Daheng broiler roosters were randomly divided into 2 groups with 10 replicates per group and 20 broilers per replicate. Broilers in control group were fed a basal diet, and those in PLP group were fed the basal diet supplemented with 1% PLP. The feeding experiment lasted for 49 days. At 21 and 49 days of age, samples were collected for immune organ indexes, intestinal morphology, and serum immune indexes determination. At 49 days of age, cecal contents were collected for metagenomic sequencing analysis. The results showed as follows: 1) compared with control group, the final body weight, average daily gain and average daily feed intake of broilers in the PLP group were significantly increased (P<0.05), and the increased ( P<0.05), and the ratio of feed to gain was significantly reduced ( P<0.05). 2) At 21 days of age, the Fabricius index, duodenal villus height and villus height/crypt depth ratio in the PLP group were significantly higher than those in the control group ( P<0.05);at 49 days of age, the duodenal villi height in the PLP group was significantly higher than that in the control group (P<0.05). 3) The contents of serum total protein (TP) (21 and 49 days of age), immunoglobulin A (IgA) (21 and 49 days of age) and immunoglobulin G (IgG) (49 days of age) in the PLP group were significantly higher than those in the control group (P<0.05). 4) The metagenomic sequencing results showed no significant differences in ct diversity of cecal microbiota between control group and PLP group (P>0.05);compared with the control group, the relative abundances of cecal Clostridium, Anaeromassilibacillus, Roseburia, Eisenbergiella and BittareUa in the PLP group were significantly increased (P<0.05). 5) KEGG results showed that there was no significan

关键词： 黄芩   间作   豆科植物   根际微生物  

摘要： 为探究间作豆科植物对黄芩品质的影响，以此筛选合理的间作模式，提升黄芩品质。实验以单作黄芩为对照，设置黄芩与黄芪、甘草、绿豆和大豆4种豆科植物间作为处理，系统分析其品质、农艺性状、光合特性及根际土壤微生物等指标的差异情况。结果表明，间作对黄芩品质提升有较大影响。间作处理下，黄芩的根粗、茎长和根鲜重等指标均有不同程度的提高，药材品质也相应实现了不同水平的优化。其中黄芩-黄芪间作提高程度最大，提升幅度达到15.4%，显著高于黄芩单作模式；微生物群落分析揭示，间作显著改变了根际土壤细菌群落结构。与单作相比，有益菌群的相对丰度在间作处理下显著高于单作模式。综上所述，黄芩-黄芪间作处理通过调控根际微生物群落结构、增强养分利用效率及光合作用，改变了黄芩土壤细菌群落组成，增加其丰富度及功能的丰富性，提高黄芩光合效率，能提升黄芩品质并有效缓解黄芩连作障碍，为建立生态友好的黄芩栽培模式提供了理论依据和技术支撑，可作为缓解黄芩连作障碍、提升黄芩品质的有效措施。