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本试验采用16S-rRNA测序分析泌乳期摄食芸薹子后母鼠及其子鼠盲肠微生物菌群结构和多样性差异,并检测母鼠泌乳性能、母鼠及其子代免疫性能和氧化性能,分析探讨现代芸薹子的药效机理。选取产仔时间前后相差不超过1 d、体重(55.00±2.00)g的产后母鼠20只,并调整至每只母鼠带仔鼠10只,随机分为试验组和对照组,即试验组、对照组分别为10只分娩母鼠及10只仔鼠。试验日粮在基础饲粮中加入5%的菜籽粉,基础日粮用同等能量玉米粉代替。结果显示:(1)芸薹子对母鼠分娩一周内的泌乳量没有显著影响(P > 0.05),但显著提高了小鼠7、14、21日龄均重(P < 0.05),分别提高了14.84%、15.94%、 17.36%,分娩1周内小鼠的日均增重提高了23.58%(P < 0.01)。(2)泌乳鼠摄食芸薹子后,母鼠乳腺免疫球蛋白IgG、总蛋白、总氨基酸、MDA含量无显著差异,但乳腺溶菌酶含量提高了54.46%(P < 0.05),母鼠及子鼠血清中IgG含量降低了10.86%、12.46%(P < 0.05)。(3)泌乳鼠摄食芸薹子后,母鼠及其子鼠盲肠乳杆菌属丰度下降、普氏菌属和拟杆菌属丰度增加。结果提示,泌乳期摄食一定量芸薹子可改变母鼠和子鼠肠道菌群结构,提高母鼠泌乳性能,但对母鼠和子鼠的免疫性能有抑制作用。
[关键词] 芸薹子|泌乳母鼠|肠道菌群结构|泌乳性能|免疫性能 相似文献
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用1,2,3,4号复合维生素和市售华罗多维(对照)饲喂20-60日龄纯种荣昌哺乳仔猪,结果表明:3号维生素组日重分别较1,2,4和对照组提高16.61%(P<0.01),8.75%(P<0.05),9.86%(P<0.05)和17.45%(P<0.01),4号,1号维生素能提高饲料利用率,3号维生素能提高采集量和日增重,综合经济效益以3号维生素组最佳。 相似文献
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半胱胺对AA肉用仔鸡生长性能的影响 总被引:15,自引:0,他引:15
选用刚出壳的AA肉鸡540只,公母各半,随机分为5组,每组设3个重复,每个重复36羽肉鸡,第1组(对照组)饲喂基础日粮,第,2,3,4组分别在基础日粮中添加60,90,120,150mg/kg的半胱胺(CS),试验结果表明:0-21日龄时,添加60mg/kg半胱胺组的平均日增重(ADG)比对照组提高5.03%(P<0.05),22-42日龄时,添加90mg/kg CS组的ADG比对照组提高7.82%(P<0.05),全期(0-42日龄)添加90mg/kg CS组的ADG比对照组提高5.93%(P<0.05),添加150mg/kg CS组的ADG明显低于其它各组,添加150mg/kg CS组的料重比和成活率均明显低于其它各组,其它各组之间料重比和成率均无显著差异。 相似文献
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本文以新疆呼图壁种牛场牧二场1-7胎863头次的西门塔尔牛的产奶量数据为研究对象,利用SPSS(13.0)单因素方差分析过程,分析了胎次对西门塔尔牛产奶量的影响,结果表明:第1胎产奶量最低,第3胎产奶量最高。其中第1胎次奶牛305天泌乳量与第2、3、4、5胎次305d泌乳量差异极显著(P〈0.01),第3胎次奶牛305d泌乳量与第7胎次差异显著(P〈0.05),其他各胎次间差异不显著(P〉0.05)。因此,加强饲养管理、合理调整牛群结构是提高群体产奶量增加经济效益的关键。 相似文献
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泌乳母猪饲粮适宜赖氨酸水平的初步研究 总被引:4,自引:0,他引:4
将30头大长北经产母猪随机分为3组,产后饲喂0.60%(I组),0.80%(II组),1.00%(III组)3种赖氨酸水平的泌乳期饲粮,研究饲粮赖氨酸水平对泌乳母猪生产性能及血液,奶生化指标的影响,结果表明,增加饲粮赖氨酸浓度对哺乳21天的母猪体重,采食量,断奶至再发情天数(P>0.10)和21日龄的平均窝仔数,仔猪腹泻率无显著影响(P<0.05),21日龄仔猪窝重随着饲粮赖氨酸浓度的增加而显著增加(P<0.06),初生至7日龄(P<0.06),14日龄(P<0.03)和21日龄(P<0.01),的窝增重均随饲粮赖氨酸浓度增加而增加,产后14天猪乳蛋白II组,III组极显著(P<0.01)高于I组;固形物含量II组显著(P<0.05)高于I组,产后21天猪乳固形物含量II组显著(P<0.05)高于I组,泌乳期母猪血清尿素氮[浓度I组显著(P<0.05,泌乳14天),极显著(P<0.01,泌乳21天)高于II组,III组;白蛋白浓度II组显著(P<0.05),高于I组,从本次试验的结果看出,在生产条件下,大长北母猪泌乳期饲粮赖,氨酸水平以0.80-1.00%为宜。 相似文献
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选取前2胎产仔数相近、体况一致的新西兰白兔妊娠母兔48只,随机分成3组,探讨木瓜粉对母兔繁殖性能、泌乳量及血清激素等指标的影响。对照组饲喂基础日粮,试验Ⅰ、Ⅱ组分别在基础日粮中添加5%、10%木瓜粉。妊娠18天时试验开始至仔兔30日龄断奶时结束,为期42天。结果显示:与对照组相比.试验组仔兔初生窝重、21天窝重、断奶窝重显著提高(P〈0.05),产仔数、活仔数、断奶数等差异不显著(P〉0.05).两试验组间差异不显著(P〉0.05);木瓜粉显著提高母兔7、14、21天的泌乳量(P〈0.05),提高21天血清E2、PRL水平(P〈0.05)。结果表明添加木瓜粉可提高母兔的繁殖性能和泌乳性能。 相似文献
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分别进行了用赖氨酸螯合铁和硫酸亚铁饲喂妊娠、哺乳期母猪、用葡萄糖铁给初生仔猪补铁的试验。结果表明,饲喂赖氨酸螯合铁组母猪所生仔猪比对照组母猪所生仔猪断奶成活率高9.2个百分点(P<0.05),平均断奶重高18.8%(P<0.01);比饲喂硫酸亚铁组母猪所生仔猪断奶成活率高3.1个百分点(P>0.05),平均断奶重高9.9%(P<0.05);与给3日龄仔猪注射葡聚糖铁相比,成活率和断奶重分别提高0.2个百分点和2.3%(P>0.05)。 相似文献
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以维生素和有机微量元素、活性酵母、植酸酶、缓冲剂等绿色饲料添加剂为主体开发生产安全性种羊预混料,具有增加种公羊射精量,改善其精液品质和提高母羊妊娠、哺乳期生产性能,增加羔羊断奶重等的显著效果,使用安全环保。与对照组相比,可提高无角陶赛特公羊一次射精量0.16ml(P〈0.05),精子密度1.70亿/ml(P〈0.01),精子活力0.07(P〉0.05),使小尾寒羊母羊头均产活仔数、羔羊初生重和羔羊断奶重分别提高0.3只、10g/只和0.72kg/只(P〉0.05)。 相似文献
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VA,VE,Se提高母猪繁殖力效果试验 总被引:6,自引:0,他引:6
VA、VE、Se在母猪生产上的应用研究,旨在提高母猪窝产仔数及仔猪断乳成活率。同时观察对仔猪初生重、断乳体重及母猪泌乳量的影响。试验母猪在断乳后第3天至妊娠21天、产前1周至产后1周分两阶段口服VA、VE,肌注亚硒酸钠,与对照组猪同等条件饲养。试验结果为,试验母猪平均窝产仔11.8头,仔猪初生重平均1.48千克,断乳体量平均8.63千克,断乳成活率88.7%,母猪产后7天每天平均泌乳量3.63千克;对照组母猪平均每窝产仔10.2头,仔猪平均初生重1.63千克,断乳体重平均8.15千克,断乳成活率79.5%,母猪产后7天每天平均泌乳3.32千克。结果表明,试验母猪窝产仔数平均比对照母猪提高1.6头(P<0.05),断乳成活率提高9.2%,产后7天内泌乳量提高9.3%。 相似文献
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魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
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本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
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以国际标准强毒R株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离MG,并收集感染鸡所产蛋分离MG。结果表明,人工感染48小时后上、下呼吸道及肺已被全面感染,96小时气囊已被感染,120小时输卵管已能分离到MG,卵巢始终分离不到MG。人工感染鸡自144小时便能在其所产蛋中分离出MG。药物治疗能在72小时内消除感染,油乳剂苗则需24天后逐渐降低蛋内MG分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内MG,但以研制的种蛋浸泡剂药浴效果为最好。 相似文献
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REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air. 相似文献
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Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF
Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo. 相似文献