共查询到20条相似文献，搜索用时 46 毫秒
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杭州市余杭区的畜牧业在传统农业向都市农业转轨、农业产业结构战略性调整的进程中已经成为集畜禽养殖、畜产品加工、饲料兽药、畜牧业服务为主的大产业链。畜禽养殖业结构经过战略性调整、优化，优势畜牧业产业带已初步形成。 相似文献
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中草药饲料添加剂在畜禽生产中的应用 总被引：2，自引：0，他引：2
随着畜牧业集约化发展,化学合成药及抗生素等饲料添加剂在畜禽生产中的广泛应用,不仅造成其在畜禽体内残留和蓄积,产生毒副作用,还引起细菌耐药性产生、动物免疫力下降、环境污染等问题。中草药作为新型的饲料添加剂正引起国内外的广泛重视,被认为是解决以上问题的有效途径之一。为此,笔者对中草药饲料添加剂及其在畜禽生产中的应用进行了简单综述。 相似文献
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随着农业产业结构调整的不断深入,畜牧业在农业产业结构中的比重越来越大,所占地位也越来越突出.畜牧业发展不断壮大、效益渐好的今天,由于畜禽流通的快速发展,畜禽疫病仍在零星暴发,严重影响并制约了农村养殖业的经济效益.畜牧业服务体系建设滞后的问题也日益凸现,为保障畜牧业稳步快速发展,完善和健全畜牧兽医队伍建设对保障农村畜牧业的持续发展显得尤为迫切和必要. 相似文献
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杨祥启 《畜牧兽医科技信息》2023,(11):51-53
生物除臭技术逐渐被广泛应用,采用该技术,可大幅度降低畜禽养殖和周围环境中的恶臭,降低环境污染,加快畜牧业的发展,为保证畜禽养殖场内环境和空气标准提供必要条件。 相似文献
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陆国香 《上海畜牧兽医通讯》2007,(2):74-74
随着2004年年初东南亚禽流感疫情发生，越来越暴露出了我县传统畜牧业生产中的许多薄弱环节。本人认为推进畜禽养殖小区建设是规范畜禽生产、有效控制重大动物疫病发生和改善农村畜粪污染最有效的方式，对促进农业产业结构的调整、推动畜牧业健康有序地发展、帮助农民致富等都具有十分重要的意义。现就我县畜禽养殖的现状，提一些想法和建议。 相似文献
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正近年来,随着农业产业结构不断优化升级,常熟市现代农业总体呈现出了良好的发展态势。作为现代农业的重要组成部分,全市畜牧业发展也表现出了强劲的发展势头,尤其是通过3年的畜禽养殖污染专项整治行动后,畜牧业结构进一步优化,畜禽疫病防控体系建设不断加强,畜产品质量稳步提高,生态环境有效改善。总体来看,常熟市畜牧业发展稳中有升。2016年,在畜禽总量不断减少的情况下,常熟市实现畜牧业产值5.315 5亿元,同比增长2.0%。截至2016年 相似文献
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随着畜禽饲养规模的不断扩大，畜禽粪便产生量急剧增加，大大超过目前土地有效使用量，大量废弃的畜禽粪便已成为环境污染的重要杀手，同时也制约了畜牧业可持续发展。因此推进畜牧业健康、稳定发展，必须解决畜牧发展和环境污染的矛盾，对畜禽粪便实施资源化利用，按照“减量化、无害化、资源化”的原则，通过农业措施、生物措施、工程措施等多种形式，积极探索与土地资源和种植结构相配套， 相似文献
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环境问题与畜牧业的可持续发展(上) 总被引：4，自引：0，他引：4
本文依据国内外有关资料 ,以及北京所属大型养殖场有关调查数据 ,对畜禽饲养中的环境污染现状及其成因进行描述性分析 ,在此基础上 ,对人口、环境与畜牧业可持续发展之间的关系作出进一步阐释 ,并据此提出治理畜禽饲养中环境污染的对策措施 ,以期促进我国畜牧业和经济、社会的可持续发展。 相似文献
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规模化畜牧生产对环境的污染及防治措施 总被引：1，自引：0，他引：1
随着人类生活水平不断提高，畜牧业迅速发展，在畜禽生产过程中的排泄物、废弃物等已成为重要的污染源之一。笔者论述了畜牧业对环境污染造成的原因、特点及危害，并提出了减少环境污染的生态技术措施。 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