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《黑龙江畜牧兽医》2020,(14)
为了比较丹麦440、青海444、青燕1号、青引1号在新疆塔城、石河子地区的生长状况,并筛选出适宜当地种植的燕麦品种,试验采用完全随机区组设计,测定不同地区不同品种燕麦株高、干草产量、中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)、可溶性碳水化合物(WSC)、粗蛋白(CP)、粗脂肪(EE)、粗灰分(Ash)及相对饲喂价值(RFV)等指标,并通过隶属函数对不同品种燕麦在不同地区的生产性能进行综合评价。结果表明:塔城地区丹麦440干草产量最高,为12.25 t/hm~2,与塔城地区其他燕麦品种差异显著(P0.05);石河子地区青燕1号干草产量最高,为7.91 t/hm~2,除丹麦440外,与石河子地区其他燕麦品种差异显著(P0.05)。青引1号株高在塔城和石河子地区均为最高。塔城地区青海444 RFV显著高于本地区其他品种(P0.05),石河子地区青引1号RFV显著高于本地区其他品种(P0.05)。塔城地区青燕1号CP含量最高,为9.88%,与青海444差异显著(P0.05);石河子地区丹麦440 CP含量最高,为11.68%,显著高于本地区其他品种(P0.05)。塔城地区青海444 NDF、ADF含量显著低于本地区其他品种(P0.05),分别为45.02%、22.30%;石河子地区青引1号NDF含量显著低于其他品种(P0.05),为46.27%;丹麦440 ADF含量最低,为20.99%,除青引1号外,与本地区其他2个品种差异显著(P0.05)。塔城地区青燕1号WSC含量、Ash含量最高,分别为11.03%、7.08%,除丹麦440外,与其他2个品种均差异显著(P0.05);石河子地区丹麦440 WSC含量、EE含量显著高于其他品种,分别为11.04%、4.64%(P0.05)。塔城地区青燕1号EE含量显著高于其他品种(P0.05),为6.07%。石河子地区青燕1号Ash含量最高,为7.87%,与丹麦440差异显著(P0.05)。说明塔城地区适合种植青海444,石河子地区适合种植丹麦440。 相似文献
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为了对新疆石河子地区野生熊蜂进行种类鉴定,试验采用形态学鉴定及线粒体细胞色素C氧化酶亚基Ⅰ(COⅠ)基因序列扩增、测序,并与GenBank登录的熊蜂参考序列进行遗传进化分析等分子生物学鉴定。结果表明:本次采集的石河子地区熊蜂经形态学鉴定为真熊蜂亚属(Bombuss.str.),分子生物学鉴定其为明亮熊蜂,COⅠ基因DNA序列的碱基组成A+T含量(76.45%)较高;石河子地区明亮熊蜂与吉尔吉斯斯坦明亮熊蜂同源性(97.0%～97.8%)最高,与北京地区明亮熊蜂同源性(90.8%～92.4%)最低;石河子地区明亮熊蜂与吉尔吉斯斯坦明亮熊蜂聚为同一支,与德国、英国、瑞士等欧洲明亮熊蜂及蒙古国明亮熊蜂、内蒙古地区明亮熊蜂形成一个大支,与北京地区明亮熊蜂形成一个类群。 相似文献
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尼拉蛋鸡混合感染枝原体与沙门氏菌崔建华（新疆石河子总场一分场８３２０１２）１９９６年元月，石河子地区某鸡场饲养商品尼拉蛋鸡３２００只。在育成期间发生类似于传染性关节炎与沙门氏菌混合感染的疾病。鸡群感染率８０％，发病鸡６５０只，发病率２３．３％，共淘汰... 相似文献
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为了解新疆石河子地区某猪规模化猪场O型口蹄疫病毒(FMDV)、猪瘟病毒(CSFV)、猪繁殖与呼吸综合征病毒(PRRSV)、猪圆环病毒2型(PCV-2)的抗体水平以及猪伪狂犬野毒(PRV)感染情况,本研究应用ELISA检测技术对该场84份血清进行了FMDV、CSFV、PRRSV、PCV-2、PRV gE蛋白抗体检测.结果发现,FMDV抗体阳性率为70.24％;CSFV抗体阳性率为82.14％;PRRSV抗体阳性率为97.62％;PCV-2抗体阳性率为54.76％;PRV gE蛋白抗体阳性率为75.00％.该结果为了解该猪场5种常见传染病的整体免疫水平,进一步制定合理的免疫程序和防制措施提供参考. 相似文献
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为了解石河子地区规模化猪场主要疫病的血清流行病学现状,为猪场制定更为科学合理的免疫程序提供依据,减少养殖户的损失,采集石河子地区4个规模化猪场(分别编号为A、B、C、D)猪只血清,用酶联免疫吸附试验(ELISA方法)检测3种疫病的血清抗体阳性率。结果显示检测的587份血清中,猪蓝耳病抗体总阳性率为88.42%;620份血清中,猪瘟抗体阳性率为81.77%;344份血清中,猪O型口蹄疫的抗体阳性率为87.79%。3种传染病中猪瘟的抗体阳性率最低,口蹄疫的抗体阳性率最高,说明石河子地区养殖场应加强对猪瘟的预防接种,防止猪瘟的暴发。 相似文献
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近年来，新疆石河子地区鸡传染性法氏囊病的发生较为频繁，而且与以往的发病情况发生了较大变化，主要表现为以下几点。3～5周龄的鸡较多发，而且白羽肉鸡、黄羽肉鸡的发病率比蛋鸡高：发病鸡群的死亡率不大，一般发病率10％～加％，死亡率5％～8％左右。个别发病严重的鸡群死亡率在10％-15％左右：首免使用法氏囊中毒偏强疫苗的鸡群在免疫后2～3天，有个别死亡现象， 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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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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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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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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乳酸杆菌作为益生菌广泛用于人和动物.本文综述了乳酸杆菌改善宿主健康的机制.乳酸杆菌可通过产生抗菌物质如乳酸、过氧化氢、细菌素,或者通过竞争营养或肠道黏附位点来抑制致病菌;通过诱导黏附素的分泌或阻止细胞凋亡而增强肠道的屏障功能,从而保护肠道.文章重点讨论了乳酸杆菌表面成分(表面蛋白、脂磷壁酸和肽聚糖)与肠道受体(C型凝集素受体、Toll样受体和Nod样受体),阐述了他们结合后启动免疫调节信号,调控肠道免疫功能以发挥改善健康作用的机制. 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