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魔芋又称药翦，是天南星科魔芋属的多年生草本植物。我国魔芋资源丰富，有20多种。云南以其独特的地理环境及气候条件，魔芋品种有17个之多，占全国魔芋属种质资源的63％。魔芋飞粉（简称飞粉）是在魔芋精粉的加工过程中，飘落到周围的重量轻、颗粒小的细粉。飞粉作为魔芋精粉加工中产生的副产品，占魔芋粉质量的30％～40％。随着魔芋加工业的发展，产生大量的魔芋飞粉，资源丰富，价格便宜。在饲料中添加部分魔芋飞粉，饲料颗粒的稳定性指数得到了提高，同时还利用了本地资源，降低了配方成本，提高了经济效益。本文综述了近年来魔芋加工副产品在动物生产中的应用研究进展。 相似文献
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魔芋飞粉基质生料发酵研究 总被引：5，自引：1，他引：4
应用微生态学原理，接种有益微生物酵母、乳酸菌、根霉对魔芋加工厂下脚料——魔芋飞粉基质进行生料固态发酵，２８℃厌氧发酵１０ｄ。通过对发酵基质中乳酸菌、酵母、大肠菌群、污染菌总数、酸度的测定及发酵前、后粗蛋白、粗纤维、总淀粉含量的检测，证实了魔芋飞粉基质完全适合有益微生物生长繁殖，并得到改造，为开辟新的饲料资源，研制魔芋飞粉生物料作了有益的探索。 相似文献
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花生麸、木薯粉对生长猪的饲效试验广东省畜牧局张国杭，陈剑儒云浮市畜牧饲料实验中心温景旭，陈志权本试验旨在探讨用花生麸代替豆粕、木薯粉代替玉米对瘦肉型中猪、大猪生长发育及饲料效益有何影响。１．材料与方法１．１试验猪的品种及分组试验猪购自封开县某畜牧良种... 相似文献
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长期以来，在养猪业中普遍使用抗生素类饲料添加剂控制猪的肠道病原菌，防治猪的肠道疾病（如腹泻）和促进猪的生长。由于抗生素作为饲料添加剂使用的副作用日益明显，受到越来越严格的限制，引起人们对用益生菌控制猪肠道病原菌引起疾病的重视，开展了广泛的研究与试验，希望用其替代抗生素类饲料添加剂防治猪肠道病原菌疾病。 相似文献
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随着生活水平的提高，人们对畜禽肉质与健康之间的关系越来越关注。影响肉质的因素很多，其中最重要的是遗传因素，而饲料营养是最重要的环境因素。本文将集中讨论饲料营养对猪、禽肉品质的影响，在日粮和饲养范围内提出改善猪、禽肉品质的营养调控措施。１饲料营养对猪禽... 相似文献
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松针粉色绿，有清香味，富含维生素、必需氨基酸、微量元素及植物杀菌素等，是较理想的畜禽饲料添加剂。国外应用松针粉作畜禽饲料已有三十余年，并已进行工业化、规模生产。国内开发松针粉资源也已多年，但多用于作家禽饲料，鲜见用于生长猪的报道。湖南省会同县县著名的林区，境内马尾松分布极广。松针叶作为常见的林副产品被废弃，为变废为宝、因地制宜开发饲料资源，我们进行了添加松针粉饲喂生长猪的试验。一、松针粉的营养成分1．主要营养成分（1）松针粉的主要营养成分（％）水分11．3、粗脂肪9．5、粗蛋白8．l、粗纤维29．3、无氮浸… 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