试论宁夏肉羊产业的发展方向

针对宁夏养羊业存在的主要问题，通过分析入世后宁夏养羊业面临的机遇与挑战，认为宁夏发展肉羊业必须实现四个转变，同时，提出了宁夏肉羊业的发展思路和对策。     

草地生态环境建设对宁夏养羊业的影响与对策

生态环境建设是我国西部大开发战略的重要组成部分 ,传统的养羊方式加速了宁夏草地生态环境的恶化。养羊业与生态建设具有长期交互影响 ,科学合理处理二者关系 ,促进经济与环境建设协调发展是西部开发战略成功的标志。草地生态建设对宁夏养羊业提供了很好发展的机遇的同时 ,也势必对宁夏传统的养羊方式产生极大的冲击 ,对宁夏养羊业产生深远的影响。宁夏以优质肉羊生产体系建设为突破口 ,促使养羊业转入科学饲养现阶段。     

转变观念迎接挑战发展宁夏养羊业

1 宁夏养羊业发展的挑战与机遇 宁夏是回族聚集的地区,羊肉是宁夏回、汉等各民族的当家肉食,养羊是宁夏的传统优质产业,历史悠久.     

陕西省羊病发生特点、流行趋势及防控对策

目前陕西省养羊业发展迅速,但是由于对羊病缺乏有效的防控手段,致使羊病种类繁多难以控制,给养羊业造成重大的经济损失。本文从陕西省养羊业的现状、羊病发生的总体情况、羊病防控中存在的问题以及对羊病防控的几点建议等四个方面综述了陕西省羊病防控存在的问题及如何控制羊病的发生,为陕西省羊病的防控提供参考资料。     

新疆养羊业可持续发展与生态环境研究

<正>养羊业是我国新疆地区传统的产业之一,在当地农牧区经济占据很重要的地位,解决好新疆养羊业可持续发展与生态环境的问题,能够有效促进新疆地区经济的增长和地区的发展。本文分析了新疆养羊业发展存在的主要问题,提出了推进养羊业可持续发展的措施,以供参考。1新疆养羊业发展基本情况及主要做法1.1促进草原畜牧业生产方式的转变首先新疆地区要加大对山羊、绵羊放牧区等工程的建设力度,用实际行动来进行草原的环境保     

论循化县养羊业科学发展前景的探讨

对循化县养羊业发展现状深入调查的基础上,分析和提出了现实条件下科学发展循化县养羊业的生产模式,以及应该大力应用和发展的相关技术,以期提高养羊业的科技水平,促进养羊业健康快速发展。     

定边县肉羊产业现状与发展对策

根据定边县养羊业生产现状,针对定边县肉羊生产中存在的问题,结合发展养羊业所具有的饲料资源、地理位置等优势,提出了今后定边县肉羊业发展的具体建议.     

如何提高母羊的繁殖力

发展养羊业,就是要争取经济效益最大化,必须科学养羊,增加收入,减少支出,特别要降低饲料成本。影响羊场经济效益的因素是多方面的:羊场疫病的防控是搞好养羊业的前提;采用优质的饲草饲料是搞好养羊业的基础;品种改良是养羊业持续发展的根本;母羊的繁殖力是羊场经济效益的保障。     

上海市养羊业现状调查及发展对策探讨

随着上海市产业结构调整和食物结构的变化,养羊业在农业和食品消费中的地位日趋重要。为了加快养羊业的发展,研究发展过程中存在的问题,2013年4—6月对上海市各区县羊的养殖现状和农作物副产物的利用情况展开了调研活动。本文在深入调研的基础上概述了上海市羊养殖现状和羊饲料及农作物副产物利用现状,分析了养羊业发展中存在的问题,并提出了加快发展上海市养羊业的建议。     

实施退耕还林、封山禁牧 如何发展庆阳市养牛和养羊业

随着我国加入世贸组织和人民生活的不断提高，养殖业已成为农业经济发展的支柱产业，从庆阳市目前养殖现状和国内外形势分析来看，发展养牛养羊业前景广阔，是农民增加收入最具有发展潜力的产业，但是随着生态步伐的加快，近几年各地在积极实施退耕还林工程的同时，加大了对林草的管护力度，采取了“封山育林”的措施，禁止牛羊上山放牧。封山禁牧后．如何发展庆阳市的养牛养羊业。笔者认为，只有调整发展思路，转变饲养方法，科学舍饲，庆阳的养牛养羊业才有出路。     

商会自治的基石——商会自治规范研究

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。     

癸氧喹酯干混悬剂含量测定的改进

采用高效液相色谱法测定癸氧喹酯干混悬剂的含量,在2-250μg/mL范围内,峰面积的常用对数与进样量浓度的常用对数呈良好的线性关系,R^2=1(n=5),平均回收率为99.24%~99.51%,RSD在0.05%~0.28%。此方法分析时间短,样品前处理简便、定量结果准确,重现性好,结果满意,为其质量控制提供了依据。     

猪毛色遗传的研究进展

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。     

Comparison of 2 methods of centesis of the bursa of the biceps brachii tendon of horses

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.     

不同样本商品蜂蜜中硒含量的测定

用硝酸和高氯酸消化蜂蜜,使硒游离出来,在微酸性环境下,硒和2,3-二氨基萘(DAN)生成有较强荧光的物质,用环己烷萃取,在激发波长378nm,荧光波长518nm处测定其荧光强度。蜂蜜中硒含量范围:0.10～0.82μg/g。表明:蜂蜜应视为天然富硒营养品。     

乳酸杆菌益生作用机制的研究进展

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。     

中华人民共和国农业部公告 第267号

为贯彻落实《兽药生产质量管理规范》(简称《兽药GMP》),进一步推动兽药GMP实施进程,我部制定了《兽药生产质量管理规范检查验收办法》,现予公告。本公告自2003年6月1日起施行。附件:兽药生产质量管理规范检查验收办法二○○三年四月十日第一章 总则 第一条 为推动《兽药生产质量管理规范》(以下简称兽药GMP)的实施,规范兽药GMP检查验收工作,制定本办法。 第二条 农业部负责全国兽药GMP管理和检查验收工作;负责制修订兽药GMP检查验收管理规定;负责兽药GMP检查员队伍建设和监督管理工作,负责国际兽药贸易中GMP互认工作。 …     

鸡败血支原体垂直传播模式及其阻断方法

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。     

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.