共查询到20条相似文献，搜索用时 62 毫秒
1.
我国中草药资源十分丰富，现有中草药材13000多种,我国又是世界第二大饲料生产国．在发展中草药饲料添加剂方面有巨大的潜力。中草药属纯天然物质．有促进生长、增强体质、促进代谢、提高性能、抗应激和防治疾病等作用。中草药饲料添加剂是以天然中草药的物性、物味、物间关系的传统理论为主导，辅以饲料和饲料工业等学科理论和加工技术而制成的纯天然饲料添加剂， 相似文献
2.
我国中草药资源丰富，中草药饲料添加剂来源广泛，是一种使用安全，无毒副作用的高效廉价添加剂，近几年在生产中已较稳妥，扎实地显示出我其独特的优势，中草药饲料添加剂具有促进畜禽生产，增加其体质，防治疾病和提高饲料利用率等作用，它在拓宽中草药应用范围中具有重要意义，本文主要介绍了中草药饲料添加剂的种类，对畜禽的影响，作用机理及其配方原则。 相似文献
3.
中草药饲料添加剂能够促进畜禽生长发育,提高生产性能,同时还能增强机体的抗病能力,且无耐药性,无毒副作用或毒副作用小等优势,因而越来越在畜牧生产中被广泛应用。本文综述了中草药饲料添加剂对猪生长性能、胴体性状及肉质特性的影响。 相似文献
4.
中草药饲料添加剂具有健胃、消炎、抑菌、增加食欲、补充营养、调节脏腑机能，改善机体免疫状态及促进生长和提高饲料转化率等多种功效，由于它既无抗药性和耐药性，也无药害的残留和副作用，并在生产上已经较稳妥，扎实地显示了独特的优势，所以近年来中草药饲料添加剂受到了人们的青睐，本文主要介绍了中草药饲料添加剂的种类，作用机理及其配方原则。 相似文献
5.
奶牛中草药饲料添加剂的应用研究 总被引：5，自引：0，他引：5
胡美华 《兽药与饲料添加剂》2002,7(5):31-33
近年来，随着对中草药的免疫功能、药理学、药代动力学的研究，世界各国掀起了研究应用中草药饲料添加剂的热潮。中草药源于食物，取自于自然界的动物、植物和矿物等，是动物体最易接纳的纯天然物质。中草药饲料添加剂种类繁多，且涉及多种动物，本文就中草药饲料添加剂在奶牛等反刍动物中的应用研究作一综述。１中草药饲料添加剂在奶牛业中的应用中草药饲料添加剂具有许多独特优势，在奶牛业生产中的应用研究越来越受到有关专家和学者的重视。据报道，在奶牛泌乳早期应用中草药饲料添加剂可明显提高奶牛的产奶量，改善乳汁成分犤１，２犦。… 相似文献
6.
中草药饲料添加剂的功能及畜牧业的应用概述 总被引：5，自引：0，他引：5
随着饲料工业及饲养业的发展，饲料添加剂的品种日趋增多，其中中草药添加剂为天然物质，避免了其它类型添加剂（如化学合成药物、抗生素等）的抗药性、残留、毒副作用等缺陷，在我国中草药品种多、产量大、有着丰富的资源优势和悠久的应用历史。 １中草药添加剂的分类 根据作用的差异，中草药添加剂可分为营养性和非营养性两大类，但这种分法不是绝对，中草药品种繁多，功用各异，一药多用，多药协同。因此，多数中草药添加剂同时具有营养性和非营养性两方面作用。 １．1营养性中草药添加剂 某些中草药添加剂含有丰富的氨基酸。微量元素、… 相似文献
7.
中草药饲料添加剂在养殖业的应用 总被引：2，自引：0，他引：2
余伯良 《兽药与饲料添加剂》1998,3(4):11-13
近年来,很多国家兴起一了对天然物中草药饲料添加剂的开发研究[1]。我国地域辽阔,中草药资源十分丰富,开发利用中草药饲料添加剂具有得天独厚的条件。现在已知有100多种中草药可以作为饲料添加剂,如大蒜、辣椒、艾叶、松针叶、生姜、肉桂、花椒、胡椒、山苍子、穿心莲。板蓝根、甘草、苍术、麦冬以及仙鹤草等。许多中草药作为添加剂,具有营养保健、调味促生长、改善肉质等作用,有的中草药还能用于饲料的防腐抗氧化。中草药饲料添加剂与人工合成的饲料添加剂特别是与抗生素饲料添加剂相比,具有效果显著,毒副作用小,无致癌、致畸、致… 相似文献
8.
中草药饲料添加剂的应用效果及其研制 总被引：6，自引：1，他引：5
刘学剑 《兽药与饲料添加剂》1999,4(3):39-41
中草药饲料添加剂是目前畜牧科技工作者研究开发的热点，本文就中草药作饲料添加剂的应用效果及其研制应注意的问题作一简述，供参考。1中草药饲料添加剂的作用中草药饲料添加剂是由不同性味功能的中草药依据中兽医学的理论和动物不同生理需要配制而成。由于中草药种类繁多、结构复杂、成分多样，决定了不同的中草药添加剂具有不同的功效.但归纳起来，主要有：1）从中兽医学的理论分析，中草药饲料添加剂大致由下列几方面的作用组合而发挥作用：(1)理气消食，助脾健胃即具有调理、疏通气机，消食健胃，健脾养胃等作用。常用的性味药如陈皮、… 相似文献
9.
本文从现有研究成果出发,归纳了中草药饲料添加剂在畜禽养殖中五个方面的作用：即预防疾病,营养保健,调味促生长,改善肉质以及饲料防腐等作用。提出当前中草药饲料添加剂开发利用存在的一些问题,呼吁加强中草药饲料添加剂的研究。 相似文献
10.
在现代畜禽养殖生产中 ,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 ,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愈来愈受到重视。中草药饲料添加剂具有促进畜禽生长和保健作用 ,并因其毒副作用小、无残留、无耐药性的独特优势愈来愈被重视。１中草药饲料添加剂种类中草药饲料添加剂配方千变万化 ,目前尚无统一的分类。现根据动物生产特点、饲料工业体系和中草药性能 ,将中草药饲料添加剂作如下分类。１．１免疫增强剂以提高… 相似文献
11.
12.
13.
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
14.
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
15.
16.
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
17.
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
18.
19.
20.
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