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中草药饲料添加剂在仔猪生产上的应用 总被引:2,自引:0,他引:2
近年来,随着人们对抗生素、化学合成物作为饲料添加剂使用容易使动物产生抗药性和药物残留等用药弊端的认识加深,无公害的中草药饲料添加剂越来越多地受到关注。中草药添加剂可解决长期困扰畜牧业发展的抗生素残留问题,提高生产率,减少畜牧业对环境的污染,发展绿色畜牧业,满足人们对食品的安全要求,具有重要的经济意义和社会效益。中草药饲料添加剂具有增强机体免疫机能,提高动物抗应激、抗病能力,改善动物生产性能,且无残留、不易产生耐药性等优点。20世纪80年代以来,有关中草药饲料添加剂在猪(尤其在仔猪)饲养中应用效果进行了大量研究。… 相似文献
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饲用抗生素滥用导致细菌耐药性、残留给人类健康、畜牧业发展和环境保护带来很大的危害.新形式下,能有效防止畜禽疾病的发生、促进动物生长,又毒副作用小、无残留、无耐药性的绿色饲料添加剂日益成为国内外研究的热点.中草药添加剂在促进动物生长和提高免疫功能方面有独特优势,合理搭配使用对动物无任何毒副作用,本文主要阐述中草药添加剂的主要作用及在畜产品生产中的应用,可为中草药添加剂在饲料替抗之路中提供理论依据. 相似文献
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随着我国畜牧业的快速发展,中兽药(亦称兽用中草药,以下简称中草药)添加剂已成为动物营养学研究的一大热点。大力开发中草药饲料添加剂对解决抗生素残留问题,提高生产率、发展绿色畜牧业,满足人们的食品安全需求,增强我国畜产品在国际市场的竞争力具有重要的经 相似文献
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近年来,随着人们对抗生素、化学合成物作为饲料添加剂使用容易使动物产生抗药性和药物残留等用药弊端的认识加深,无公害的中草药饲料添加剂越来越多地受到关注。中草药添加剂可解决长期困扰畜牧业发展的抗生素残留问题,提高生产率,减少畜牧业对环境的污染,发展绿色畜牧业,满足人们对食品的安全要求,具有重要的经济意义和社会效益。20世纪80年代以来,有关中草药饲料添加剂在猪(尤其在仔猪)饲养中应用效果进行了大量研究。通过研究表明,在仔猪饲料中添加中草药,对增 相似文献
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近年来,中兽药(亦称兽用中草药,以下简称中草药)添加剂已成为动物营养学研究的一大热点。大力开发中草药饲料添加剂对解决抗生素残留问题,提高生产率,发展绿色畜牧业,满足人们的食品安全需求,缩小我国畜牧业与发达国家的差距,增强我国畜产品在国际市场的竞争力具有重要的经济意义和社会效益。 相似文献
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在现代规模化畜禽养殖生产中,人们普遍在畜禽饲料中添加抗生素、激素和化学合成药物等,但这些物质的长期使用,易引起病原微生物产生抗药性、畜产品药物残留和环境污染等问题,严重威胁着人类健康。因此,新型药物饲料添加剂的研制和使用已成为畜牧业共同关心的问题。中草药作为饲料添加剂,具有与食物同体、同源、同用的特点。此外,中草药还含有丰富的维生素、氨基酸以及矿物质等多种营养成分,达到促进机体生长发育、新陈代谢等功效,能够改善动物生产性能,提高动物机体抗疾病能力以及抗应激性,增强机体免疫力,不易使机体产生耐药性。在畜牧业中应用中草药作为饲料添加剂可显著提高畜牧产业的生产效率,从而解决以往由于添加抗生素导致抗生素残留动物体内等问题,使畜牧业对环境的污染减少,在满足人们健康饮食的同时,促进畜牧业稳步发展。 相似文献
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随着我国养殖业的快速发展,大量人工合成的饲料添加剂如:抗生素、激素、防腐剂等在饲料中的广泛应用,对推动养殖业的快速发展起到了巨大的推动作用,然而,长期、大量使用化学药物添加剂导致的药物残留和耐药性等问题备受人们的重视,随着生活水平的不断提高,人们对食品安全的认识也逐渐加深,要求畜牧畜牧产业提供绿色、安全、无公害的产品的呼声越来越高,而中草药添加剂不仅具有纯天然、无毒副作用、无耐药性、无污染及残留低等特点,还且还具有增强动物免疫功能、提高动物抗应激能力、促进动物生长、改善畜禽品质等功能,其深受广大养殖户的青眯,因此,绿色的中草药添加剂取代抗生素等化学合成药物已是必然所趋,我国中草药资源十分丰富,开发中草药饲料添加剂具有很大市场潜力。本文对中草药饲料添加剂的特性及在养殖业中的应用现状进行详细概述,这为进一步研究中草药饲料添加剂提供参考。 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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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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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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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