共查询到20条相似文献，搜索用时 62 毫秒
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一、关于饲料产品质量这里所说的质量,系指饲料产品的营养质量、卫生质量和加工质量。没有好的营养质量,饲料产品就无法满足动物营养需要,动物的健康和生产性能就会受损,养殖业主就不会获得好的经济效益。饲料产品的卫生质量不仅关系到被饲喂动物的安全和健康,同时会间接影响人的卫生、安全。合格、良好的加工质量是饲料产品营养、卫生质量的保障条件。我们强调饲料产品质量,是由于饲料产品是人的间接食品。养殖业主用饲料饲喂动物,生产人类所需要的动物产品。没有营养、卫生和加工合格的饲料产品,就难以生产出供人消费的营养、卫生… 相似文献
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浅谈商品饲料污染与绿色饲料开发 总被引：2，自引：0，他引：2
饲料安全和卫生直接关系到饲喂动物的安全和人类的健康。如1998年英国疯牛病的风波,1999年比利时发生的“二英事件”等都是由于饲料污染所致。此外,有些饲料企业由于原料配置不合理,重金属及有害物质残留和卫生指标超标,也会造成畜禽中毒及其产品污染。畜牧科学工作者已经充分认识到畜牧生产中环境污染和畜产品毒物残留的严重性和危害性,防止和控制商品饲料的污染,直接关系到动物和人类的健康,是解决问题的关键。1防止和控制饲料污染,是解决畜产品有害物质残留的关键饲料产品质量首先应该是以安全为基本前提。饲料产品质量标准应该包括营养… 相似文献
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饲料是饲养动物的物质基础,近几十年来现代化、集约化的动物饲养业尤其是养猪业的蓬勃发展离不开现代化的配合饲料工业的崛起.动物的优良遗传性能,必需有营养较为齐全的配合饲料才能充分发挥作用,丰富的饲料来源和饲料的加工以及饲料配合技术,是配合饲料的关键.我国十三亿人口的温饱问题已基本解决,现在则要求吃好,讲营养,注重健康长寿,普及和推广配合饲料,可以大大提高动物产品质量适合人们健康营养的需要.
在几十年普及和推广配合饲料中,即至目前的配合饲料,尤其是猪的配合饲料,主要饲料成分多集中在玉米、豆粕、添加剂、维生素、微量元素等,几种较为单一的成分,除了营养较为单一以外,影响最大的是玉米、豆粕等粮价不断攀升,致使养猪成本不断提高,猪肉价格又影响了物价的稳定,影响城乡居民对猪肉的需求.猪是杂食动物,较单一的饲料对猪肉产品的质量也有影响.为此,利用我国丰富的饲料资源,发展饲料加工技术和饲料配合技术不仅可以降低猪的饲料成本,更为重要的是提高了猪肉营养丰富的质量品质. 相似文献
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饲料加工对营养的影响及研究方向 总被引：3，自引：0，他引：3
饲料是畜禽生产上开支最大的一项。在美国,饲料支出约占总养殖成本的６０％～６５％,而在中国,饲料支出约占总成本的６５％～７０％。可见,采用恰当的加工技术,使饲料达到最大效率,对养殖动物至关重要。饲料加工的目的正是为了充分发挥饲料营养价值的潜力,提高产品质量和饲养效果。饲料加工对营养的影响一直是饲料加工商和营养学家关心的问题,它是科学配方得以实现的保证。将加工工艺与动物营养科学研究有机结合,会使得动物生产性能、畜禽健康和畜产品的质量有更大的提高。加工工艺对营养影响的研究内容很广,可大致分为研究加工工… 相似文献
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《中国畜牧兽医文摘》2016,(2)
<正>1概述随着我国畜牧业生产和饲料工业的兴起与发展,人们对饲料的质量问题也日益重视。饲料质量主要包括3项内容:1营养质量;2卫生质量;3加工质量。对这3方面质量都有一定要求,而这些要求具体体现在各种畜禽的饲养标准、饲料卫生标准及饲料加工标准等方面。这三类标准互相联系,又各有自身的特殊性,不可互相替代。没有好的营养质量,饲料产品就无法满足动物的营养需要,动物的健康受损、生产性能得不到长期充分的发挥, 相似文献
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控制有毒有害物质，提高饲料卫生质量 总被引：1，自引：0，他引：1
控制有毒有害物质，提高饲料卫生质量江西农业大学牧医学院霍明仁饲料产品质量包括营养质量、卫生质量和加工质量三个方面，这三者对饲料质量来说是同等重要的，在评价饲料质量时，缺少哪一方面都不能反映饲料质量的好坏，尤其是饲料的卫生质量。因为，它不仅直接影响畜禽... 相似文献
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饲料加工过程中的质量控制 总被引：1，自引：0，他引：1
饲料工业的最终产品——肉、蛋、奶直接影响全国人民的膳食结果及卫生健康,因此,提高和稳定饲料产品的质量显得尤其重要。影响饲料产品质量的因素是多方面的,主要有原料本身的质量;饲料的配方是否科学合理;生产工艺是否符合生产的需求;加工机械的选型能否适合生产的需求;操作管理人员的技术素质以及仓储、运输等环节都能影响饲料产品的最终质量。就饲料加工过程来说,只有在饲料加工工艺适应饲料产品要求的前提下,才能保证饲料产品的质量。因此,当前饲料加工厂不仅要着眼于最终产品的质量把关,同时还需要从全生产过程进行控制。概… 相似文献
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饲料加工工艺设计与设备的选择是高效生产饲料的重要途径。饲料加工对动物营养的影响一直是饲料加工工艺学家和营养学家共同关心的问题,是科学配方得以实现的保证。将加工工艺学科与动物营养学科有机结合,使得动物生产性能、机体健康和动物产品的质量有更大的提高。鉴于此,《新饲料》杂志从2011年第6期开设新工艺新设备栏目,为饲料生产企业提供参考。 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