共查询到20条相似文献，搜索用时 140 毫秒
1.
2.
半乳甘露寡糖对肉鸡生产性能和免疫机能的影响 总被引：21，自引：0，他引：21
本试验研究了日粮中添加半乳甘露寡糖对肉鸡生产性能及免疫机能的影响。试验选用 36 0只肉鸡 ,随机分为 4组 ,即抗生素组、0 .0 8%半乳甘露寡糖 +抗生素组、0 .12 %半乳甘露寡糖 +抗生素组、0 .12 %半乳甘露寡糖组。结果表明 :( 1)半乳甘露寡糖对饲料转化率和平均日增重没有显著影响 (P >0 .0 5 ) ,但日粮采食量有提高的趋势 ;( 2 )添加半乳甘露寡糖与添加抗生素相比 ,胸腺、脾脏和法氏囊相对重量差异不显著 (P >0 .0 5 ) ,但脾脏和法氏囊的相对重量有提高的趋势 ;( 3)半乳甘露寡糖组与抗生素组相比 ,血清新城疫抗体滴度显著提高 (P <0 .0 5 )。 相似文献
3.
外源寡糖对奶山羊血清生化指标和抗氧化指标的影响 总被引：2，自引：0，他引：2
为研究外源寡糖对奶山羊血清生化指标和抗氧化指标的影响,试验选用体况良好、年龄相近、体重（３２．８０±２．４５）ｋｇ的崂山奶山羊 ６只,采用分期分组试验设计,分别饲喂添加 １％（以有效含量计）甘露寡糖、半乳甘露寡糖、果寡糖、寡木糖和异麦芽寡糖的试验饲粮,另设不添加寡糖的对照组。试验共分为 ４期,每期 ３５ｄ,其中预试期 ７ｄ,正试期 ２８ｄ。结果表明：与对照组相比,果寡糖可显著降低血清丙二醛和低密度脂蛋白胆固醇含量（Ｐ＜０．０５）,显著提高血清中总蛋白和球蛋白含量（Ｐ＜０．０５）;甘露寡糖可显著降低血清丙二醛含量和谷丙转氨酶活性（Ｐ＜０．０５）,提高血清中球蛋白和血清磷含量（Ｐ＜０．０５）;半乳甘露寡糖可显著提高血清中总蛋白（Ｐ＜０．０５）、球蛋白（Ｐ＜０．０１）、高密度脂蛋白胆固醇（Ｐ＜０．０５）和血清磷含量（Ｐ＜０．０５）,增强血清总超氧化物歧化酶活性（Ｐ＜０．０５）,降低血清丙二醛（Ｐ＜０．０１）、尿素氮（Ｐ＜０．０５）、甘油三酯（Ｐ＜０．０５）和低密度脂蛋白胆固醇（Ｐ＜０．０５）含量,降低血清谷丙转氨酶活性（Ｐ＜０．０５）。各种寡糖对奶山羊血清谷草转氨酶、谷胱甘肽过氧化物酶活性和白蛋白、葡萄糖、总胆固醇、血清钙含量无显著影响（Ｐ＞０．０５）。综上所述,饲粮中添加不同寡糖能够在一定水平上提高奶山羊的抗氧化能力,改善机体脂质代谢、蛋白质合成以及钙、磷的吸收,且对肝脏和心脏无损害,建议在奶山羊饲粮中添加的寡糖种类有果寡糖、甘露寡糖和半乳甘露寡糖,其中半乳甘露寡糖为首选。 相似文献
4.
5.
6.
半乳甘露寡糖对猪门静脉血流速率、氨基酸和葡萄糖的净吸收量及耗氧量的影响 总被引：4，自引：0，他引：4
通过对10头15kg体重试验猪实施门静脉血管插管等外科手术,并结合回肠肠系膜静脉灌注对氨基马尿酸(PAH)技术,探讨半乳甘露寡糖对生长猪门静脉血浆流率(PVPF)和血液流率(PVBF)、氨基酸和葡萄糖的净吸收量及耗氧量的影响。10头杜长大阉公猪随机分为2个处理,每个处理5头,单笼饲养于可调节不锈钢代谢笼内,经过14d适应期后,在门静脉、肠系膜静脉、颈动脉安装插管,开始15d正式试验。对照组饲喂玉米-豆粕型基础饲粮,试验组饲喂基础饲粮 0.20%半乳甘露寡糖。结果表明,经过15d饲喂期后,与对照组相比,饲粮添加半乳甘露寡糖可显著降低试猪食后8h内门静脉的平均血浆流率和血液流率,显著提高食后8h内门静脉对氨基酸和葡萄糖的净吸收量,显著降低食后8h内门静脉的耗氧量,也就是说半乳甘露寡糖可通过减少生长猪小肠黏膜对氨基酸和葡萄糖的氧化而增加肠外组织对其吸收。 相似文献
7.
《中国兽医杂志》2014,(6)
本试验在基础日粮中添加天蚕素、免疫多糖、圆葱寡糖和维吉尼亚霉素,对肉仔鸡的生产性能、免疫器官及功能的影响进行了研究。结果表明,添加天蚕素的试验组与添加免疫多糖、圆葱寡糖和维吉尼亚霉素的对照组在肉仔鸡体重和饲料报酬方面无显著性差异(P>0.05)。28d时天蚕素试验组的脾脏重和脾脏指数、胸腺重和胸腺指数显著高于免疫多糖组和维吉尼亚霉素组(P<0.05),表明天蚕素对肉仔鸡免疫器官的影响与圆葱寡糖一致,高于免疫多糖和维吉尼亚霉素。28 d时添加天蚕素组、免疫多糖组和圆葱寡糖组的ND抗体效价显著高于添加维吉尼亚霉素组(P<0.05);添加天蚕素与圆葱寡糖组的白细胞数显著高于免疫多糖组(P<0.05),极显著高于添加维吉尼亚霉素组(P<0.01)。表明天蚕素、圆葱寡糖和免疫多糖具有促进免疫细胞生长,增强肉仔鸡免疫功能的作用。 相似文献
8.
半乳甘露寡糖对早期断奶仔猪生长性能及腹泻的影响研究 总被引：7，自引：0，他引：7
选用体重(8.4±0.27)kg(杜×长×大)28d断奶仔猪72头,随机分为3个处理组,每个处理组6个重复,每个重复4头猪。3组处理日粮分别为:处理1为基础日粮添加0.12%的半乳甘露寡糖;处理2为基础日粮添加50×10-6的金霉素+0.08%的半乳甘露寡糖;处理3为基础日糖添加100×10-6的金霉素。结果表明:处理1的平均日增重和平均日采食量最高,且处理1和2之间差异显著(P<0.05),饲料转化率3个处理组间差异不显著。试验期间,处理2、3组各有1头猪轻微腹泻,注射青链霉素1d后好转,处理1无腹泻发生。试验表明半乳甘露寡糖可提高仔猪生产性能且有减少腹泻发生的趋势。 相似文献
9.
半乳甘露寡糖对早期断奶仔猪生长性能的影响 总被引：7，自引：0，他引：7
试验旨在研究日粮中添加不同比例的半乳甘露寡糖替代抗生素对早期断奶仔猪生长性能及腹泻的影响。试验选用体重 (8.4± 0 .2 7)kg(杜×长×大 ) 2 8d断奶仔猪 72头 ,随机分为 3个处理 ,每个处理 6个重复 ,每个重复 4头猪。三组处理日粮分别为 ,处理 1为基础日粮添加 0 .12 %的半乳甘露寡糖 ;处理 2为基础日粮添加 5 0mg/kg的金霉素 + 0 .0 8%的半乳甘露寡糖 ;处理 3为基础日粮添加 10 0mg/kg的金霉素。结果表明 :处理 1的平均日增重和平均日采食量最高 ,且处理 1和 2之间差异显著 (p <0 .0 5 ) ,处理 1的平均日增重比处理 2提高 17.5 5 % ,比处理 3提高 7.13% ;饲料转化率 3个处理间差异不显著。另外 ,试验期间 ,处理 2、3组各有一头猪轻微腹泻 ,注射青链霉素一天后好转 ,处理 1无腹泻发生。试验表明 ,半乳甘露寡糖可提高仔猪生长性能且有减少腹泻发生的趋势。 相似文献
10.
半乳甘露寡糖(Galacto-Mannan-Oligosaccha-rides,GMOS)又称为半乳甘露低聚糖,是由我国科研人员自主开发出的一个寡糖品种。近3年多来,包括笔者在内的多名研究人员已经验证了其在早期断奶仔猪、常规断奶仔猪、生长育肥猪和泌乳母猪的应用效果,现作一综述。1半乳甘露寡糖的原料目前生产和制备GMOS的主要原料为半乳甘露聚糖胶,如田菁胶等。田菁[Sdsbania cnnabina(Retz)Pers]原产于低纬度热带和亚热带沿海地区,为灌木状草本植物,耐盐、耐涝,是优良的改良土壤的绿肥植物。它的适应范围很广,在我国大部分地区都能种植生长,特别是沿海地区… 相似文献
11.
12.
13.
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
14.
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
15.
16.
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
17.
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
18.
19.
20.
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