猪粪便重金属污染的防控措施分析

当前我国生猪养殖面临着猪粪便重金属污染的窘境,对我国生猪绿色养殖带来了负面影响。文章梳理了近年猪粪便重金属污染防控的措施相关研究,总结分析了猪粪便重金属污染防控的措施,旨在为今后生猪养殖有效防控重金属污染提供可行的科学参考措施,以期实现生猪无害化、绿色和高效养殖。     

猪常见腹泻疫病诊断和防治技术

生猪养殖中猪腹泻病经常发生,目前,我国的生猪养殖环境不断改善,猪腹泻疾病的发病率也逐步降低,但是在生猪养殖中容易出现常见病和多发病,影响经济效益。因此,在生猪养殖中,需要合理的鉴别腹泻病。本文首先介绍生猪养殖中腹泻疾病,然后阐述常见的猪腹泻病类型,并提出猪腹泻病的诊断鉴别方法,最后提出生猪常见腹泻的综合防治措施,为猪腹泻病的防控提供参考。     

猪常见繁殖障碍疾病的防治措施

生猪养殖过程中繁殖障碍疾病的出现严重制约了规模化生猪养殖的发展潜力,常见的生猪繁殖障碍疾病有猪细小病毒病以及猪伪狂犬疾病等,这些疾病均会导致生猪生产性能和繁殖性能的显著下降.猪细小病毒病和猪伪狂犬疾病的防治措施主要是通过猪只的良好饲养管理以及疫苗注射等方式进行.本文将对生猪养殖过程中常见的繁殖障碍疾病猪细小病毒病和猪伪...     

猪痢疾的诊断与防治措施

生猪养殖中传染性疾病的出现会显著降低生猪的生产性能和养殖的经济效益,猪痢疾是生猪养殖中一种常见的肠道传染病,主要是由于感染了螺旋体目、短螺旋体科、短螺旋体属中猪痢疾短螺旋体而出现的一种消化道传染性疾病.患病猪只主要会出现出血性下痢的情况,严重影响生猪的机体健康和生产性能,制约了生猪养殖产业的发展.本文将对生猪养殖中猪痢疾的疾病诊断措施以及疾病的防治措施进行介绍,旨在为生猪养殖产业的健康发展提供帮助.     

浅谈猪腹泻病的治疗

随着养殖业的兴起,目前很多养殖人员开始转型到生猪养殖中,在养殖时产生的疫病不仅会降低养殖经济效益,严重时还会对食品市场产生影响,当前生猪养殖疫病呈现出高发状态,在诸多生猪疫病中以腹泻最为常见,生猪腹泻不仅会严重影响患病猪的生长速度,加大养殖人员的成本支出,而且严重时还会导致生猪死亡,且猪腹泻的诱因较多,养殖管理不善以及引种不规范等均会导致猪腹泻,基于此,本文从猪腹泻病的发病原因入手,介绍了其治疗以及预防措施,以期降低猪腹泻病发病概率,提升其治愈率,进而保障猪群健康生长。     

猪喘气病的临床鉴别与防治思考研究

随着养猪行业的发展,在生猪养殖中猪喘气病比较常见,这种猪病会增加生猪养殖的风险。为了能够保证生猪养殖的经济效益,提高养殖户对生猪疾病的认识,应该要了解并做好猪喘气病的预防工作。本文就猪喘气病的临床鉴别进行分析,同时做好防治猪喘气病的工作,有效地治疗猪喘气病,促使生猪健康生长。     

提高散养户防治猪病技术的措施

当前农村地区养殖生猪环境条件仍然较差,多数散养户不具备生猪养殖管理、疾病防治的知识,因病猪不能够及时治愈而增加养殖成本,猪病流行得不到有效控制造成损失,都严重影响生猪养殖获得的经济效益.探寻提高猪病防治技术的措施,让散养户掌握生猪科学饲养相关的基本知识,树立信心步入生猪养殖业,通过养殖少量生猪来解决家庭生活所需意义重大...     

猪气喘病的临床症状与防治措施

猪气喘病是生猪养殖中一种常见的慢性呼吸道疾病,导致猪气喘病出现的主要原因是由于猪肺炎支原体的感染,患病猪只会出现咳嗽、气喘的症状,同时患病猪只的采食量和生产性能也出现下降的情况,严重影响了生猪养殖产业的经济效益和可持续发展能力.本文将对生猪养殖中猪气喘病的临床症状、诊断以及防治措施进行介绍,旨在为猪气喘病的良好防治以及我国生猪养殖产业的科学发展提供帮助.     

规模化生猪饲养场保育猪养殖管理技术

随着规模化生猪饲养场的规模和数量的不断增多,养殖管理技术显得尤为重要,根据生猪的不同生理阶段进行科学的养殖管理,不仅能够加快生猪的生长发育速度,也能够提升生猪养殖的生产效益,从而达到增产增收的目的。保育猪作为生猪养殖过程中承上启下的一环,有着重要的意义,本文介绍了保育猪的养殖管理技术,希望能够帮助规模化生猪饲养场的管理人员科学的进行养殖与管理。     

兽医治疗猪腹泻病的研究

猪腹泻病在生猪养殖中十分常见,引发猪腹泻病的原因多样,养殖过程中稍有疏忽就会导致生猪感染该病.猪腹泻病如果得不到及时的治疗,将会严重危害生猪的健康,也会对养殖的效益带来严重的影响.本文主要针对猪腹泻病的发病原因,对不同原因引发的猪腹泻病的治疗方法做了研究.     

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。     

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。     

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.