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天然色素对肉鸡脚胫着色的研究 总被引：2，自引：0，他引：2
肉、蛋品质通常包括 4个方面 ,即感观品质、深加工品质、营养价值和卫生质量。随着生活水平的提高 ,人们在追求产品的营养价值高的同时开始注重其感观品质。感观品质是人们的视觉、嗅觉、味觉和触觉对畜禽产品的综合感受 ,对家禽而言 ,人们对皮肤、蛋黄等的着色程度要求越来越高 ,认为肉鸡的皮肤、胫、喙越黄越健康 ,蛋黄越黄越有营养。因此 ,尽管鸡的皮肤及蛋的色泽与营养价值毫无关系 ,但作为商品 ,根据顾客需要 ,仍为衡量肉鸡及鸡蛋质量的一项重要的经济指标。着色剂 (ｐｉｇｍｅｎｔ) ,指在饲料中添加的色素物质 ,经畜禽吸收后能改变畜… 相似文献
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家禽着色剂的使用与其它阎之春人们对金黄色的禽产品有所偏爱，使得这样的产品更容易销售并往往可售得更好的价格。有些消费者还认为肉鸡的胫、喙和皮肤越黄越健康，蛋黄的颜色越黄越富有营养，酒店茶楼对肉鸡本身的色素尚嫌不足，还要再涂上一层食品色素。目前，禽产品的... 相似文献
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近年来,广东以及省外的养鸡户和消费者对肉鸡皮肤着色程度要求越来越高,一些饲料企业为迎合市场需要,不得不加大化学着色剂的添加量,原来每吨只需添加30～40元的着色剂,现在竟增加到140～150元的着色剂,甚至更高。仅着色剂一项,每吨饲料增加成本100元以上,不少饲料企业为陷入这一“黄色怪圈”而深感忧虑。 造成这一现象的原因是多方面的。有人认为:广东人有吃黄鸡的习惯,要求肉鸡饲料着色效果好,色“黄” 相似文献
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近年来,广东以及省外的养鸡户和消费者对肉鸡皮肤着色程度要求越来越高。一些饲料企业为迎合市场需要,不得不加大化学着色剂添加量,原来每吨料只需添加30—40元的着色剂,现在竟增加到140—150元的着色剂,甚至更高。仅着色剂一项,每吨饲料增加成本100元以上,不少饲料企业为陷入这一“黄色怪圈”而深感忧虑。 相似文献
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近年来,广东以及省外的养鸡户和消费者对肉鸡皮肤着色程度要求越来越高。一些饲料企业为迎合市场需要,不得不加大化学着色剂的添加量,原来每吨料只需添加30～40元的着色剂,现在竟增加到140～150元的着色剂,甚至更高。仅着色剂一项,每吨饲料增加成本100元以上。 造成这一现象的原因是多方面的。有人认为,广东人有吃黄鸡的习惯,要求肉鸡饲料着色效果好,这是市场的要求,色“黄”有它的商品 相似文献
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广东温氏食品集团所属饲料厂，1996年共生产肉鸡配合饲料21万吨，出栏肉鸡4700多万只，取得了较好的经济效益。令人惊奇的是，在不少企业为提高肉鸡着色效果而在饲料中加大进口化学着色剂用量时，“温氏”却坚持不用化学着色剂，仅此一项就减少成本数百万元。他们的奥秘何在呢？一是饲养的三黄鸡品种好。不同鸡品种对饲料中色素的沉积作用的差异较大。“温氏”由于有自己的家禽研究所和育种场，培育出来的鸡品优良，对色素的沉积利用率高。二是饲料原料选择得好。“温氏”对玉米的要求很高，不使用贮存时间太长、叶黄素破坏较大的玉米，但同… 相似文献
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郁明发 《国外畜牧学(猪与禽)》1985,(3)
斑螫黄(canthaxanthin)是一种广泛使用的类胡萝卜素着色剂。具有红染作用,加于饲料中用以改进肉鸡皮肤、蛋黄、鲑鳟类鱼肉、鲤鱼、金鱼等的色泽,尤能使蛋黄的色泽大大浓染。 相似文献
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在饲料中加入类胡萝卜素着色剂,使蛋黄和肉鸡皮肤颜色满足市场要求是现代养禽业广泛采用的方法.但由于影响类胡萝卜素着色效果的因素很多,实际生产中常常出现着色不良的问题.本文将分析一些影响因素并介绍一种简单、易行的肉鸡皮肤快速着色方法. 相似文献
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在饲料中加入类胡萝卜素着色剂，使蛋黄和肉鸡皮肤颜色满足市场要求是现代养禽业广泛采用的方法。但由于影响类胡萝卜素着色效果的因素很多，实际生产中常常出现着色不良的问题。本文将分析一些影响因素并介绍一种简单、易行的肉鸡皮肤快速着色方法。 相似文献
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着色剂及其在肉鸡生产中的应用 总被引：1，自引：0，他引：1
在饲料中添加着色剂主要是为了增加畜禽及水产养殖动物产品的色泽，使其具有更为鲜艳美观的色泽，以提高其商品价值。此外，还可通过着色剂改变饲料的颜色，刺激畜、禽的食欲。近年来，随着消费水平的提高，愈来愈多的人士关』已肉鸡皮肤着色等问题。为了适应广大消费者的消费心理，有必要改善肉鸡的肤色，使之与自然放养状况的黄肤色相接近。仅依靠饲料主要原料中的天然色素已很难达到目前用户要求的着色效果，只能靠添加人工提纯或合成色素来实现。本文就着色剂这一问题作一阐述，供参考。l春色剂中色素沉着的生理基础在正常情况下，蛋黄… 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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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
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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