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由美国ＡＤＭ集团公司与四川畜科院饲料总公司联合举办的“氨基酸在饲料中的合理运用研讨会”近日在蓉召开。来自企业科研等单位的近两百人参加了会议。会议由四川省畜科院饲料公司总经理、副研究员邝声耀主持。美国ＡＤＭ公司亚洲技术经理蔡永久博士在会上对合理发挥饲用氨基酸的最大效益作了详细的技术分析。饲用氨基酸近来在畜禽饲料中得到广泛的应用 ,具有近 1 0 0 %可消化利用性 ,它们的合理使用 ,可使营养价值相对低的植物蛋白转变成类似于营养价值高的动物蛋白 ,从而可以节省饲料成本。要发挥好饲用氨基酸的最大效益 ,关键在饲养配方… 相似文献
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添加剂预混合饲料是一种或多种微量成分(单一添加剂)组成的、加有载体与稀释剂的均匀混合物.既可作为商品直接出售,也可作为生产浓缩料、全价饲料的第一道工序.它是浓缩料、全价配合饲料的重要组成部分,是提高畜禽饲养效果的关键部分,它可以完善饲料的营养价值,提高饲料利用率,促进动物生长,增进动物健康,改善畜产品品质,最终达到提高动物生产性能,降低生产成本的目的. 相似文献
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添加剂预混合饲料是一种或多种微量成分（单一添加剂）组成的、加有载体与稀释剂的均匀混合物。既可作为商品直接出售，也可作为生产浓缩料、全价饲料的第一道工序。它是浓缩料、全价配合饲料的重要组成部分，是提高畜禽饲养效果的关键部分，它可以完善饲料的营养价值，提高饲料利用率，促进动物生长，增进动物健康，改善畜产品品质，最终达到提高动物生产性能，降低生产成本的目的。 相似文献
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<正>在实际畜禽饲养工作中既要弄清确切的维生素的缺乏症状和相应的维生素需要量还要注意科学贮存,只有这样才能保证和提高饲料中维生素的营养价值,才能使畜禽正常生长、繁殖、生产和健康。1维生素的分类及动物缺乏时的症状 相似文献
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黄粉虫的营养价值和喂养技术 总被引：3，自引：0，他引：3
目前，用人工养殖的特种水产品和野味珍禽如甲鱼、鳗鱼、山鸡、野鸭等，由于脂肪含量低，营养价值高，具有独特的风味，受到人们的青睐。当前饲养这些特种动物的难点是饲料问题。这些动物大都属肉食性动物，若采用植物性饲料喂养效果不很理想。在开发生产满足它们生长需要的专用饲料时，人们发现黄粉虫可作为能满足特种养殖需要的高蛋白饲料。1黄粉虫的营养价值及作为动物性饲料的优点1.l品质好黄粉虫含蛋白质60％，各种氨基酸含量丰富，其中赖氨酸5.72％、蛋氨酸0.53％，含脂肪11.9％、钙1.02％、磷1.11％、碳水化合物7.4％，另外还含有多… 相似文献
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<正>动物维持生命和生长需要蛋白质,确切的讲需要氨基酸,是由其食入饲料提供的。各种饲料蛋白质又是由氨基酸组成,实质上蛋白质的营养就是氨基酸的营养,其营养价值决定于组成蛋白质的各种氨基酸。提高饲料蛋白质营养价值,是改善动物蛋白质营养,降低生产成本,提高经济效益的有效措施之一。 相似文献
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1 前言 在现代养殖业生产中,动物营养需要参数及饲料营养价值评定方法不断改进。蛋白质是生长猪最重要的营养物质之一,饲料中蛋白质质量和氨基酸平衡对生长猪生产性能、饲料报酬和饲料成本等有影响,实现配合饲料中氨基酸的平衡,已是大势所趋(王振勇,1997;钟运炎等,1989)。在常用的猪饲料原料中,苏氨酸被认为是第二或第 相似文献
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在畜禽饲养中 ,饲料中加入添加剂 ,可强化日粮的全价性 ,促进动物生长 ,发挥畜禽内在最大的生产性能 ,大大提高饲料的利用率 ,从而提高畜禽生产的经济效益。但是 ,近年来 ,市场上饲料添加剂名目繁多 ,功效重复 ,其中伪劣产品时有出现 ,真假难辨。同时 ,在畜禽饲养中存在着不同程度的模糊认识 ,使用饲料添加剂时出现一些偏差和误区。1 盲目听信和应用所谓“万能型”饲料添加剂不管自己饲养的动物营养上是否需要 ,都一概添加饲料添加剂。这样 ,不但会增加饲料成本 ,而且会给饲养动物带来危害。实际上 ,具有一定综合性功效的饲料添加剂 ,主要… 相似文献
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1应用概况
将酶添加到饲料中提高饲料营养价值和畜禽生产性能的设想和实践,已有数十年的历史。早在20世纪50年代曾有报道,添加粗制淀粉酶和蛋白酶制剂到大麦日粮中,可显著提高鸡的生长速度和饲料转化率。早期是从大麦芽中得到淀粉酶,以后用动物来源的胃蛋白酶和胰蛋白酶; 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