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羊只养殖过程中,羔羊的饲养管理及成活率直接关系到羊只养殖的经济效益。刚出生的羔羊,体质弱、抵抗能力低,而母乳有羔羊所需的主要营养,如果母羊在这时候出现母乳不足的情况,羔羊处于饥饿或半饥饿的状态,在加上养殖人员管理不当,或者羔羊感染某些疾病等,都会导致羔羊成活率低。本文对羔羊饲养管理,提高羔羊成活率的方法以及羊只胀肚的解决方法进行介绍,旨在为羊只的科学养殖带来帮助。 相似文献
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陈月梅 《畜牧兽医科技信息》2010,(1):33-34
<正>绵羊痘是各种家畜痘病中危害最为严重的一种急性、热性、接触性传染病。其特征是皮肤与无毛部位的粘膜发生丘疹和水疱。由痘病毒中的一种绵羊痘病毒引起,主要危害绵羊,尤其对羔羊和非疫区引进的羊只危害严重。不同品种、年龄的羊只具有不同的易感性,而以细毛羊最为易感,羔羊又较 相似文献
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提高高寒山区细毛羊繁育率的综合技术措施林毅彬（新疆生产兵团和田管理局）代焕喜张玉华贺天涛刘竹初（整理）（和田一牧场新疆策勒８４８３００）这些年来，新疆生产兵团和田管理局一牧场通过挖掘内涵潜力，从对母羊繁殖和羔羊育成密切相关的放牧管理等６个方面更新技术... 相似文献
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《中国畜牧兽医文摘》2012,(9)
<正>为了提高肃南县细毛羊养殖的综合效益,在大河乡红湾村开展了以细毛羊集中上站开展人工授精、虫病程序化防治、羔羊早期补饲、细毛羊穿衣、羊只标准涂料打号、集中机械剪毛、分级整理、集中拍卖,为内容的标准化生产措施,取得了显著成效,试点村的细毛羊个体只均产毛量高出全县平均水平0.8kg,细羊毛售价高于全县水平5.36元,羔羊售价高于全县水平80～100元。牧 相似文献
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<正>新疆生产兵团和田一牧场,位于昆仑山中部西北麓海拔2400米处,是一个以放牧为主从事细毛羊生产的羊场。该场1990年年初有细毛羊和细毛杂种羊37600只,其中适龄生产母羊20288只,年内3～4月份繁殖春羔17784只,至6月中旬的100天时间内,各种病亡和事故损失165只,成活17619只,成活率为99.07％,是该场近20年来羔羊成活率最高的1年。 和田一牧场1990年羔羊成活率高的原因主要是抓了以下几个方面的工作: 相似文献
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正细毛羊是一种毛肉兼用、发展潜力大、经济效益好的优势畜种。在养殖细毛羊时,若想培育出产能更高、品质更为优良的品种,就需要从羔羊培育阶段开始抓起。羔羊自出生后,母羊能够为羔羊生长发育提供一定营养,养殖户也可通过补饲技术干预。以下就对细毛羊羔羊早期补饲技术进行探讨。1 细毛羊羔羊的培育要点细毛羊羔羊培育要点有:①选择细毛羊公羔羊:首先,应综合父母本、出生体重≥4.5 kg以及毛色皮肤等情况选留,公羊体侧皮肤褶皱不宜过多。②选留公羔羊 相似文献
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羊肉产品具有味道鲜美,营养价值丰富的特点,受到广大消费者的青睐.羔羊育肥过程中的健康状况和生产性能是影响羔羊产肉量以及羊只养殖经济效益的关键因素.羔羊育肥过程中会出现很多疾病问题,例如尿结石、黄膘病等,均显著降低了羊只的健康状况和生产性能,给羊只养殖的经济效益带来负面影响.下文将对羔羊育肥过程中常见的问题以及相关的建议... 相似文献
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和管局一牧场属高寒山区 ,海拔高度2 30 0～ 42 0 0 M。该场从 195 8年起 ,引前苏联高加索与阿斯卡尼细毛羊 ,改良山区型和田半粗毛羊。 6 0年代初腹泻病开始在细毛羔羊中流行 ,70年代形成地方性流行。 80年代后 ,由于采取综合防制措施 ,使该病一度得到控制 ,但 90年代中后期又开始流行 ,现将羔羊腹泻病的调查研究报告于后。1 发病情况 1982年～ 1983年 4月 1～ 30日 ,我们对一牧场牧一、二连 9个母羊群的1881只羔羊 ,进行了存活数、死亡数以及死亡原因的调查。结果表明 :各种原因死亡羔羊2 6 6只 ,而其中死于羔羊腹泻病 6 7只 ,竟占2 5… 相似文献
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我场从1958年开始,以引进的高加索和阿斯卡尼细毛羊为父本,改良山区型和田半粗毛羊,六十年代初到七十年代中期,育种工作进入横交固定与品系繁育阶段,某些 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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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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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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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