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《养殖与饲料．饲料世界》2004,(9):18-18
糖蜜尿素舔砖是牛羊词喂尿素等安全有效的方法。牛羊饲给舔砖，能提高饲料利用率和转化率，节省精料，显著提高增重和母畜的奶量，是一种制做容易，饲喂方便的好方法。 相似文献
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李振 《养殖与饲料．饲料世界》2006,(3):10-11
尿素糖蜜舔砖,它是以糖蜜为碳源,尿素为氮源,同时添加其他物质经压制而成的块状饲料,其形状不一,有的呈圆柱形,有的呈长方形、方形不等。从20世纪80年代起,在联合国粮农组织(FAO)的帮助下,亚、非等一些国家开始研究和推广糖蜜-尿素舔砖,作为反刍动物廉价的补充饲料。1991年国家 相似文献
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尿素糖蜜舔砖的营养、制作和使用方法 总被引：5，自引：0，他引：5
科学实验已经证明 ,使用尿素糖蜜舔砖 (以下简称舔砖 )是给牛羊补充非蛋白氮和矿物质元素的一种较为合理的方式。同时 ,其加工工艺简单 ,原料来源广泛 ,成本低 ,使用安全可靠 ,效果好。1 使用舔砖的意义1 .1 这是发展牛羊饲养业的有效措施我国人多耕地少、粮食少 ,在发展畜牧业中 ,人畜争粮日趋紧张。适当调整畜牧业产业结构 ,加大牛羊饲养业发展力度 ,是缓解人畜争粮的重要途径。而使用舔砖喂牛羊 ,是牛羊利用尿素及其附产品的安全有效措施。1 .2 提高放牧的饲养效果我国牛羊饲养业大部分分布农村。农民利用零星自然草地放牧牛羊。由于… 相似文献
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印度一项尿素糖蜜舔砖课题七年研究的主要成果赖志强广西畜牧研究所王士长广西农业大学前言印度国家奶业发展委员会和国家奶业研究所有一个课题《从控制瘤胃发酵方面来研究改善反刍动物的补充料──尿素糖蜜矿物质舔砖的利用效能》，由Ｇ．Ｐ．Ｓｉｎｇｈ博士和Ｍ．Ｍｏｈ... 相似文献
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《黑龙江畜牧兽医》2015,(19)
为了研究补饲糖蜜尿素舔砖对放牧羊瘤胃中细菌种群结构随时间变化的规律,试验采用基于16S DNA的PCR变性梯度凝胶电泳(DGGE)技术,在放牧羊舔食舔砖的不同时间点取样,进行瘤胃液的DGGE分析。结果表明:舔食糖蜜尿素舔砖后放牧羊瘤胃细菌主要以拟杆菌门、硬壁菌门为主。在舔食15 d后瘤胃细菌多样性显著增加,舔食30 d后瘤胃细菌多样性达到最高。糖蜜-尿素对瘤胃微生物种群具有明显的筛选作用,舔食前以Capnocytophaga canimorsus为优势菌群,舔食一段时间后各菌群或出现或消失,呈动态变化和定植过程;30 d后瘤胃种群结构基本保持稳定,Prevotella ruminicola Bryant处于优势地位。说明舔食舔砖前后细菌种群结构存在明显差异,舔砖可明显增加瘤胃微生物多样性。 相似文献
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补饲糖密—尿素舔砖对秸秆营养成分在水牛瘤胃中降解率的影响 总被引：1，自引：0，他引：1
利用瘤胃尼龙袋法测定在不补饲和补饲糖蜜－尿素舔砖2种情况下，稻草、甘蔗叶、玉米秸3种秸秆营养成分在水牛瘤胃中停留48h后的降解率。结果表明：补饲糖蜜－尿素舔砖可使稻草、甘蔗叶、玉米秸的干物质降解率比不补饲时分别提高10．3％、9．8％、9．2％，差异显著（P＜0．05）；中性洗涤纤维降解率分别提高11．2％、9．9％、8．6％，差异显著（P＜0．05）；粗蛋白降解率差异不明显（P＞0．05），但有提高趋向。说明补饲糖蜜－尿素舔砖能提高秸秆的瘤胃降解率，具有较好的实用价值。 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