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在育肥猪饲料中添加不同剂量的半胱胺．探讨半胱胺对育肥猪生产性能的影响。试验选择健康的（杜X长X大）三元杂交育肥猪30头，体重58kg左右，随机分为3组。对照组饲喂基础日粮．试验1组为基础日粮＋130mg／kg半胱胺．试验2组为基础日粮＋200mg／kg半胱胺。结果表明。试验1组和2组与对照组相比。平均日增重分别提高7．13％和7．74％（P〈O．05）差异显著：料重比分别下降2．11％和2．41％（P〈O．05）差异显著；毛利收入增加6．66％和5．4％。试验1组和试验2组相比。试验2组日增重提高O．57％、料重比下降O．31％，但差异不显著（P〉0．05）；而经济收入减少1．16％。表明在育肥猪饲粮中添加130mg／kg和200mg／kg的半胱胺，均可显著提高育肥猪的日增重和饲料转化率，增加经济收入。而以添加130mg／kg半胱胺的综合效果较好。 相似文献
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4应用生理调节剂
据报道，在仔猪日粮中添加柠檬酸，对仔猪增重提高3．60％～38．67％；添加延胡索酸，仔猪增重提高7．0％-13．8％；添加剂复合酸，可提高仔猪日增重11．41％，饲料报酬提高6．62％，仔猪腹泻率降低52．78％。与添加柠檬酸和磷酸组相比，日增重提高3．45和5．5个百分点，饲料报酬提高3．68和6．5个百分点。综合酸化剂对仔猪日增重和饲料报酬的作用表明，复合酸的效果优于单一酸。 相似文献
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半胱胺盐酸盐对仔猪胃黏膜细胞H+-K+-ATPase活性和生长抑素表达的影响 总被引：1，自引：0，他引：1
将分离的仔猪胃粘膜细胞分为4组，在含10％胎牛血清的DMEM高糖培养液中培养24h后，分别在新鲜的基础培养液中添加0（对照组）、0．001（低水平组）、0．01（中水平组）和0．1（高水平组）g／L的半胱胺盐酸盐，继续培养20h后收集细胞。测定细胞H^＋-K^＋-ATPase活性，同时用相对定量RT—PCR法测定细胞H^＋-K^＋-ATPase和生长抑素（SS）mRNA的相对丰度。结果表明：（1）低水平的半胱胺盐酸盐对H^＋-K^＋-ATPase的表达和活性没有影响（P〉0．05），但中、高水平的半胱胺盐酸盐显著提高了H^＋-K^＋-ATPase的表达和活性（P〈0．05），其中H^＋-K^＋-ATPase mRNA的相对丰度分别提高了36％和44％，H^＋-K^＋-ATPase活性分别提高了57％和53％。（2）低水平半胱胺盐酸盐对SSmRNA的表达没有影响（P〉0．05），中、高水平的半胱胺盐酸盐显著提高了SSmRNA的相对丰度（P〈0．05），提高幅度均为52％。以上结果提示半胱胺盐酸盐可增强体外培养的仔猪胃黏膜细胞H^＋-K^＋-ATPase的表达及活性，而这一作用可能由SS所介导。 相似文献
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真假半胱胺盐酸盐饲料添加剂鉴别比较方法 总被引：1，自引：0，他引：1
半胱胺对动物生长抑素的特异性抑制的研究,引发了人们用半胱胺作饲料添加剂的兴趣,因此半胱胺添加在饲料中改善动物生产性能的大量研究报道屡见不鲜。我国自从上海华扩达生化科技有限公司2002年9月取得中国第一张饲料与饲料添加剂新产品证书(新饲证字(2002)01号,半胱胺盐酸盐(C 相似文献
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饲粮中添加保护性添加剂对仔猪生长性能的影响初报 总被引：1，自引：0，他引：1
饲粮中添加保护性添加剂，可明显提高仔猪的生长速度和饲料利用率，同时对控制肠道疾病疗效显著。据试验，在仔猪饲料中添加０．２５％保护性添加剂，可提高生长速度１０．４％，料重比下降７．９％，饲料生物学价值提高９％。 相似文献
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目的探讨猪用饲料香味对仔猪的饲喂效果。将30头断奶仔猪随机分为两组进行为期30天的对比饲喂试验。结果试验组比对照组分别提高采含量9％，日增重提高21．4％，饲料利用率提高11．6％，经济效率提高30．7％。说明在仔猪日粮中添加一定量的猪用饲料香味剂，能增加仔猪的采食量，能刺激消化液分泌增加，使饲料中的营养成份充分被消化并吸收转化，提高了饲料利用率，经济效益显著。 相似文献
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催乳保健Ⅱ号饲喂哺乳母猪的试验和对小鼠增重及免疫机能的影响 总被引：2，自引：0，他引：2
将催乳保健Ⅱ号从怀孕母猪产前４－７ｄ按０．３％比例添加于饲料中至仔猪３５日龄断奶，以观察其对哺乳仔猪断奶重，成活率，生长速率的影响；将催乳保健Ⅱ号注射液每只小鼠腹腔注射０．１ｍＬ，连续３ｄ，以探讨该方作用机理。 相似文献
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我们应用由牛、羊瘤胃内容物中分离培养的金黄色瘤胃纤维分解细菌，对碱化秸秆粉进行营养转化，使粗蛋白提高到24．62％、粗脂肪提高到12．62％、粗纤维降低到21．06％，制成我们编号的1号秸秆饲料。为了观察此饲料对猪的影响，在个体养猪户合的同窝仔猪中进行了饲养试验。在基础日粮中，加入20％1号玉米秸秆饲料，经过7个月的饲养后证明，该饲料对猪的增重有一定的作用，可节省成本费0．06元／日，计每头猪可节省12．79元。同时对胃肠卡他和胃肠炎有一定的治疗和预防作用。1．材料和方法1．11号秸秆饲料的制备：取当年产优质无霉变的干燥玉… 相似文献
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在日粮中添加不同剂量半胱胺，研究半胱胺对仔猪免疫机能的影响。选用90头新生“杜×长×大”三元杂交仔猪，随机分为3组，每组30头，分别饲喂基础日粮、基础日粮+120 mg/kg半胱胺、基础日粮+200 mg/kg半胱胺。试验期为45 d。每窝随机选取20头仔猪,分别在14、24、32、45日龄进行前腔静脉采血，测定部分免疫指标。结果表明，日粮中添加半胱胺能显著提高仔猪体重、平均日增重，降低料重比；显著提高断奶后仔猪血清IgA、IgG含量及白细胞吞噬率和T-淋巴细胞转化率。添加120 mg/kg半胱胺的日粮有较好的促生长作用，而添加200 mg/kg半胱胺的日粮更能增强仔猪的免疫机能。试验结果显示，日粮中添加适量半胱胺，可有效抑制仔猪断奶应激，提高仔猪免疫力。 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