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枯草芽孢杆菌对肉鸡生长性能和肠黏膜抗氧化及免疫功能的影响 总被引：2，自引：0，他引：2
试验旨在研究肉鸡日粮中添加枯草芽孢杆菌对其生长性能及其肠黏膜抗氧化和免疫功能的影响。将600羽1日龄健康振宁雏公鸡随机分成4组,每组设3个重复,每个重复50羽。处理组Ⅰ为对照组,饲喂基础日粮;处理组Ⅱ、Ⅲ、Ⅳ分别在基础日粮中添加0.25、0.50、0.75 g/kg的枯草芽孢杆菌制剂(活菌数为108 CFU/g)。试验期77 d。结果表明:与对照组相比,处理组Ⅱ和Ⅲ组肉鸡的日增重有所提高但无显著差异,处理组Ⅳ显著提高了6.86%(P<0.05);空肠黏膜中总抗氧化能力(T-AOC)、谷胱甘肽过氧化物酶(GSH-Px)、维生素C和黄嘌呤氧化酶(XOD)含量显著高于对照组(P<0.05),丙二醛(MDA)明显降低(P<0.05);盲肠和回肠黏膜中细胞因子IL-2、IL-4、IL-10和TNF-α含量均比对照组极显著提高(P<0.01)。提示肉鸡日粮中,添加适量的枯草芽孢杆菌制剂能改善其肠黏膜的抗氧化和免疫功能,从而提高肉鸡的生长性能。 相似文献
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《中国饲料》2017,(6)
为研究不同浓度的枯草芽孢杆菌对蛋鸡血液指标的影响,试验选用体重相近的19周龄健康"大午金凤"蛋鸡240只,随机分成4组,试验Ⅰ组为对照组,饲喂基础日粮;试验Ⅱ组饲喂基础日粮+0.1%的枯草芽孢杆菌;试验Ⅲ组饲喂基础日粮+0.5%枯草芽孢杆菌;第Ⅳ组饲喂基础日粮+1%的枯草芽孢杆菌。预饲期7 d,试验期28 d。结果表明:试验中期和末期,甘油三酯各组之间差异不明显(P0.05);总蛋白第Ⅲ组显著高于对照组(P0.05);试验中期,尿素氮和尿酸第Ⅲ组均显著低于对照组(P0.05);血氨第Ⅱ、Ⅲ组极显著低于对照组(P0.01),第Ⅳ组显著低于对照组(P0.05);IgA试验组极显著高于对照组(P0.01);IgM、IgG试验Ⅲ、Ⅳ组极显著高于对照组(P0.01)。试验末期尿素氮第Ⅲ组均显著低于对照组(P0.05);尿酸各组之间差异不显著(P0.05);血氨第Ⅲ组极显著低于对照组(P0.01),第Ⅳ组显著低于对照组(P0.05);IgA、IgM试验Ⅲ、Ⅳ组极显著高于对照组(P0.01)。IgG试验Ⅱ、Ⅲ、Ⅳ组极显著高于对照组(P0.01)。由此表明,添加0.5%的枯草芽孢杆菌对血清指标的影响比较显著。 相似文献
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《饲料研究》2014,(23)
试验旨在研究日粮中添加枯草芽孢杆菌对AA+肉鸡生产性能、屠宰性能及经济效益的影响。试验选取4 800只1日龄体质量相近且健康的AA+肉鸡,随机分成2组,每组2 400只,每组3个重复。其中,对照组饲喂基础日粮,试验组在基础日粮中添加500 mg/kg枯草芽孢杆菌,预饲期7 d,试验期35 d。结果表明:与对照组相比,试验组鸡末质量和平均日增质量分别提高7.11%和7.44%,均有显著差异(P0.05),且半净膛率和全净膛率分别显著提高1.83%和3.38%(P0.05),料肉比有降低趋势,平均每只鸡增收0.71元。可见,饲粮中添加适量的枯草芽孢杆菌能有效改善AA+肉鸡生产性能和屠宰性能,增加经济效益。 相似文献
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《中国饲料》2017,(8)
为研究不同浓度的枯草芽孢杆菌对初产蛋鸡鸡蛋品质和熟鸡蛋质构的影响,试验选用健康、体重相近的19周龄"大午金凤"蛋鸡240只,随机分成4组,试验Ⅰ组为对照组,饲喂基础日粮;试验Ⅱ组饲喂基础日粮+0.1%的枯草芽孢杆菌;试验Ⅲ组饲喂基础日粮+0.5%枯草芽孢杆菌;第Ⅳ组饲喂基础日粮+1%的枯草芽孢杆菌。预饲期7 d,试验期28 d。结果表明:试验第14天,第Ⅳ组蛋壳相对重高于第Ⅰ、Ⅲ组(P0.05);第Ⅲ组蛋白高度、哈氏单位高于其他各组,但差异不显著(P0.05),熟鸡蛋质构在各组之间差异均不明显(P0.05)。试验第28天,第Ⅲ组蛋壳相对重显著高于第Ⅳ组(P0.05);第Ⅲ组蛋白高度显著高于第Ⅰ、Ⅱ组(P0.05),极显著高于第Ⅳ组(P0.01);第Ⅲ组哈氏单位极显著高于第Ⅳ组(P0.01);第Ⅳ组蛋清弹性显著高于第Ⅱ组(P0.05);第Ⅲ组蛋清黏聚性显著高于第Ⅰ组(P0.05),极显著高于第Ⅱ组(P0.01);第Ⅱ、Ⅲ、Ⅳ组蛋黄弹性明显高于第Ⅰ组(P0.01)。由此表明,添加0.5%的枯草芽孢杆菌对鸡蛋的蛋品质和熟鸡蛋的质构有较显著影响。 相似文献
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试验旨在研究枯草芽孢杆菌对肉鸡生长性能、屠宰性能、肉品质、免疫功能、抗氧化功能和肠道形态的影响。将120只白羽肉鸡随机分成4组,每组3个重复,每个重复10只鸡。对照组肉鸡饲喂基础日粮,Ⅰ组、Ⅱ组、Ⅲ组分别在基础日粮中添加100、200、400 mg/kg枯草芽孢杆菌。试验期42 d。结果显示,与对照组相比,22～42日龄、1～42日龄时,各试验组肉鸡的平均日增重均显著升高（P<0.05）,Ⅱ组、Ⅲ组肉鸡末重均显著升高（P<0.05）,Ⅱ组肉鸡的料重比显著降低（P<0.05）。与对照组相比,Ⅱ组、Ⅲ组肉鸡半净膛率、滴水损失率、烹煮损失率均显著升高（P<0.05）;Ⅱ组肉鸡屠宰率、胸肌率及肌肉pH值均显著升高（P<0.05）。Ⅱ组肉鸡脾脏指数显著高于对照组（P<0.05）。与对照组相比,各试验组肉鸡血清免疫球蛋白G (IgG)含量均显著升高（P<0.05）,尿素氮（BUN）含量显著降低（P<0.05）;Ⅱ组、Ⅲ组肉鸡血清免疫球蛋白A (IgA)、总蛋白（TP）、丙二醛（MDA）含量均显著高于对照组（P<0.05）。Ⅱ组肉鸡血清谷丙转氨酶... 相似文献
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本试验旨在研究枯草芽孢杆菌对肉鸡生长性能、抗氧化功能和肠道形态的影响。选取1日龄雄性爱拔益加(AA)肉鸡420只,随机分为4组,每组7个重复,每个重复15只鸡。对照组饲喂基础饲粮,枯草芽孢杆菌组在基础饲粮中添加200 g/t枯草芽孢杆菌,杆菌肽锌组在基础饲粮中添加250 g/t杆菌肽锌,枯草芽孢杆菌+杆菌肽锌组在基础饲粮中添加200 g/t枯草芽孢杆菌和250 g/t杆菌肽锌。试验期42 d。结果表明,与对照组相比,饲粮中添加枯草芽孢杆菌显著提高了22~42日龄肉鸡的平均日增重(ADG)和血清丙二醛(MDA)含量(P<0.05),显著降低了1~21日龄肉鸡的ADG、平均日采食量(ADFI)及血清超氧化物歧化酶(SOD)活性和空肠隐窝深度(P<0.05)。饲粮中添加枯草芽孢杆菌和杆菌肽锌对22~42日龄肉鸡的料重比(F/G)、1~42日龄欧洲效益指数和肝脏MDA含量有显著交互作用(P<0.05)。综上所述,饲粮中添加200 g/t的枯草芽孢杆菌能提高22~42日龄肉鸡的生长性能,在一定程度上改善肉鸡空肠黏膜形态;饲粮中添加200 g/t的枯草芽孢杆菌和250 g/t的杆菌肽锌能够提高肉鸡的生长性能。 相似文献
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《饲料研究》2016,(5)
为探讨枯草芽孢杆菌对仔猪生产性能与抗病力的影响及在饲粮中的适宜添加量。试验选用180头三元杂交仔猪,随机分4个组,每组3个重复,每重复15头小猪。各组日粮如下:Ⅰ组为基础日粮;Ⅱ组为基础日粮+1.5 g/kg菌;Ⅲ组为基础日粮+2.0 g/kg菌;Ⅳ组为基础日粮+2.5 g/kg菌。结果表明:在日增质量方面,Ⅱ与Ⅲ组显著高于Ⅰ组(P0.05),Ⅲ组显著高于Ⅳ组(P0.05);料重比方面,Ⅱ与Ⅲ组显著高于Ⅰ组(P0.05),Ⅲ组显著高于Ⅳ组(P0.05);腹泻率方面,Ⅲ组极显著高于Ⅰ和Ⅳ组(P0.01),显著高于Ⅱ组(P0.05),Ⅱ组显著高于Ⅰ和Ⅳ组(P0.05)。因此,饲粮添加2.0 g/kg枯草芽孢杆菌可明显提高仔猪的生产性能与抗病力。 相似文献
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试验随机选取5 100只同批孵化、体重相近、健康的1日龄AA+商品肉鸡作为研究对象。试验设2个处理组,每组3个重复各850只,其中对照组饲喂基础日粮,试验组在基础日粮中添加500 mg/kg枯草芽孢杆菌制剂,预饲期7 d,试验期38 d。探究枯草芽孢杆菌对AA+肉鸡生产性能、氨气浓度以及经济效益的影响。试验结果如下:①试验组末重较对照组提高8.14%(p <0.05)、平均日增重提高了8.15%(p <0.05)、料肉比降低4.23%(p> 0.05),出栏率提高1.34%(p> 0.05);②试验组鸡舍NH3、H2S浓度分别降低6.33%(p> 0.05)、10.0%(p <0.05);③在经济效益方面,试验组比对照组肉鸡多增收0.57元/只。 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