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生长激素（PST）脂质体对育肥猪生产性能的影响 总被引：3，自引：0，他引：3
选择18头体重20kg左右的太湖二元杂交小公猪，分成A、B、C3组，每组6头。A组为对照组；B组颈部肌肉注射生长激素（PST）4ml/头；C组颈部肌肉注射PST脂质体28mg/头；结果表明PST与PST脂质体对育猪的生产性能影响较为接近，与对照组相比，均可显著提高育肥猪的日增重，饲料报酬，改善猪的胴体品质，说明PST脂质体可代替PST用于生产实践。 相似文献
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为研究马铃薯淀粉对育肥猪胴体特征的影响,本研究选用300头体重为55.10±2.55 kg的健康“杜×长×大”三元杂交育肥猪为研究对象,随机分成5组,对照组、A组、B组、C组、D组;每组60头,分3个平行,每个平行20头;对照组育肥猪饲喂不添加马铃薯淀粉的配方饲料;A组、B组、C组、D组分别在基础日粮中添加10 g/kg、20 g/kg、30 g/kg、40 g/kg的马铃薯淀粉;整个试验为期45 d;试验结束后对猪只进行屠宰,对其屠宰率、平均背膘厚、体直长、体斜长和眼肌面积进行测量;结果显示,C组和D组猪的屠宰率显著高于A组、B组和对照组（P<0.05）;C组和D组猪的平均背膘厚显著低于A组、B组和对照组（P<0.05）;D组的眼肌面积显著高于其他组别（P<0.05）;综上所述,40 g/kg马铃薯淀粉组育肥猪的胴体特征优于其他组别。 相似文献
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PRRSV对仔猪免疫力的影响 总被引：2，自引：0，他引：2
为了研究PRRSV对仔猪免疫力的影响,试验将13头46日龄的健康仔猪随机分A、B、C 3组,48日龄时A组猪进行滴鼻接种PRRSV LC毒株(TCID50为1×10-5.25/0.1 mL)3 mL/头,B组猪滴鼻接种未接毒正常细胞培养物3 mL/头;50日龄时A组、B组猪免疫猪瘟疫苗4头份,C组猪肌肉注射生理盐水4 mL;免疫后1,7,14,21,28,35天利用ELISA和MTT等方法检测试验组猪猪瘟抗体水平和外周血T淋巴细胞转化率.结果表明,A组猪瘟抗体水平和T淋巴细胞转化率显著低于B组(P<0.05)有极显著的,说明PRRSV对仔猪免疫力有一定的抑制作用. 相似文献
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文章旨在探究日粮中添加不同水平大豆活性肽对育肥猪生长性能、胴体性状、血清生化指标及肠道微生物的影响。试验选择体重（72.40±1.10） kg的育肥猪120头,随机分为4组,每组3个重复,每个重复10头猪。对照组育肥猪饲喂基础日粮,A组、B组和C组分别在基础日粮中添加0.2%、0.4%、0.6%的大豆活性肽。试验期42 d。结果显示,日粮中添加大豆活性肽能够显著提高育肥猪的平均日增重（P<0.05）,与对照组相比,B组育肥猪的料重比显著降低（P<0.05）,C组育肥猪的料重比和平均背膘厚显著降低（P<0.05）。添加大豆活性肽能够改善肉色,显著降低B组和C组滴水损失（P<0.05）。与对照组相比,试验组育肥猪血清丙二醛（MDA）含量显著降低（P<0.05）,B组和C组血清尿素氮（BUN）含量显著降低（P<0.05）、免疫球蛋白M (IgM)含量和总抗氧化能力（T-AOC）显著升高（P<0.05）,C组育肥猪血清谷草转氨酶（AST）和谷胱甘肽过氧化物酶（GSH-Px）活性显著降低（P<0.05）,免疫球蛋白G (IgG)含量显著升高（P&l... 相似文献
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《畜牧兽医科技信息》2016,(8)
正本研究选取育肥猪40头,随机分为A、B、C、D四个组,每组10头。前三组在日粮中分别添加0.5%、0.6%、0.7%的中草药,D组为对照组,饲喂基础日粮。结果表明:试验组A、B、C的平均日增重、饲料转化率、经济效益显著高于对照组D,但A、B、C间差异不显著,且以添加0.5%时效果最好。1材料与方法1.1试验的动物55~65日龄的育肥仔猪60头,挑选发育良好,健康无 相似文献
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目的:探究替米考星不同给药方式对猪气喘病的防治效果.方法:选取养殖的猪群中90头猪,主要分为阶段性预防用药组(A组)、育肥期治疗用药组(B组)以及对照组,每组各30头,对比其猪气喘病防治效果.结果:A组猪群呼吸道症状得分平均(1.8±0.2)分,B组猪群呼吸道症状得分平均(2.6±0.3)分,对照组猪群呼吸道症状得分平均(2.8±0.2)分,A组与对照组结果对比存在显著差异,具有统计学意义;B组与对照组结果对比不存在显著差异,具有统计学意义;A组猪群增重最多,与对照组对比,对照组结果对比存在显著差异,具有统计学意义;B组猪群增重与对照组结果对比不存在显著差异,具有统计学意义.结论:阶段性预防用药效果良好,因此,对猪气喘病的防治应以阶段性预防用药为主. 相似文献
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试验旨在研究日粮中添加不同比例的全株发酵杂交构树替代豆粕对育肥猪生长性能、胴体性状、肉品质和养分表观消化率的影响。选择48头初重（60.44±2.51） kg、健康的“杜×长×大”三元杂交育肥猪,随机分为4组,每组3个重复,每个重复4头猪。A组（对照组）育肥猪饲喂基础日粮,B组、C组、D组育肥猪分别饲喂使用3%、5%、7%全株发酵杂交构树替代豆粕的试验日粮。预试期10 d,正式试验期45 d。结果显示,与A组相比,B组育肥猪的平均日增重增加了2.78%(P>0.05);各试验组育肥猪的眼肌面积、肌内脂肪、蛋白质含量均显著升高（P<0.05）;C组、D组育肥猪对日粮酸性洗涤纤维、粗脂肪、中性洗涤纤维、钙、磷的表观消化率均显著升高（P<0.05）。研究表明,使用3%全株发酵杂交构树代替豆粕对育肥猪的生长性能、肉品质和表观消化率的影响作用较好。 相似文献
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<正>1实验室研究本研究对猪I型PRRS活疫苗(MLV)免疫接种和MLV与灭活疫苗(KV)的组合免疫接种的免疫应答进行了比较。实验设计如下(如表1),将32头小猪随机分成4组,每组8头。A组、B组、C组各组猪于1.5月龄时注射I型PRRS弱毒疫苗,D组为不注射疫苗的对照组。在猪4.5月龄时,A组注射第2次I型PRRS弱毒疫苗,B组和C组注射I型PRRS灭活疫苗(PROGRESSIS,法国Marial公司生产,2 mL,肌肉注射)。在猪5.5月龄时,C组再注 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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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
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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