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正1主要成分枣壳素是采用台湾高科技从野生酸枣中提取的夜湘产物(俗称木醋酸液)。富含200多种高分子活性物质,其主要成分为乙酸甲醇、丙酮等50种有机化合物。功效:枣壳素有一定的生物特性,具有杀菌、消毒、脱臭、保鲜及促进动植物生长功效,其作用机理是酸性的木醋酸通过降低消化道环境的ph值,抑制消化道中致病菌繁殖,帮助有益菌成为优势菌群,从而提高动物健康水平,促进动物对饲料营养物质的消化吸收。再者,木醋酸液中含有的生物菌激活剂能短时间 相似文献
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木醋酸作为饲料添加剂，国外已有研究报道，且效果显著，而国内在这方面的研究报道却很少。本试验旨在探讨蛋鸡饲料中添加木醋酸对蛋鸡的饲养效果、适宜的添加量、饲料利用率以及经济效益等问题，为今后开发利用木醋酸添加剂、提高蛋鸡生产性能的可行性提供依据。提供依据。一、材料与方法１木醋酸：由安徽农业大学有机及生化实验室提供。２供试鸡的选择及分组：在合肥蜀山种鸡场，选取健康、体重相近的４２周龄罗曼蛋鸡２０００只，随机分成４组，每组５００只。３饲养管理：四组供试鸡饲养管理条件完全相同，在同一栋鸡舍内，三层全阶梯笼… 相似文献
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锌是动物机体所必需的微量元素 ,在体内代谢所需的 2 0 0多种酶中均发现有锌的存在 (Ｄｅｌｌ,1 9 92 )。动物缺锌会影响蛋白质代谢并导致动物采食量减少 ,生长迟缓 ,饲料利用率降低 ,长骨变粗变短 ,皮肤角化及免疫和繁殖功能异常。但在动物饲料中添加过量的锌会增加粪便中锌的排出造成环境污染 ,因此准确评定锌的生物利用率对畜禽生产具有重要意义。谷物饲料 (小麦、大麦、黑燕麦、黑麦和燕麦 )中含较高水平戊聚糖 (阿拉伯木聚糖 )、β-葡聚糖以及少量己聚糖 (如纤维素、甘露聚糖、半乳聚糖等非淀粉多糖 ) ,单胃动物消化道由于缺乏降解非淀… 相似文献
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离子注入选育高产木聚糖酶黑曲霉及其发酵条件研究 总被引：1，自引：0，他引：1
木聚糖酶是一类能够特异降解木聚糖的酶类,其水解产物以低聚木糖为主,并伴有少量木糖和阿拉伯糖。研究表明,饲料中含有的非淀粉多糖(NSP)是饲料中重要的抗营养因子,木聚糖是其中之一。在饲料中添加木聚糖酶可消除木聚糖的抗营养作用,通过降低肠道内容物的黏度,提高动物内源性消化酶的活性,从而提高饲料转化率,促进养分的消化吸收。木聚糖酶酶解产生的低聚木糖有利于促进肠道内健康菌的形成,刺激动物机体的免疫反应机能,抑制病原菌的生长,减少疾病(陈瑞娟,1 993)。木聚糖酶与其他非淀粉多糖酶(如纤维素酶、β-葡聚糖酶、果胶酶)复合使用作… 相似文献
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关于利用木醋酸减轻鸡粪臭气的研究 总被引：3，自引：0，他引：3
以针叶树，阔叶树为原料制成的木醋酸兴酒在新鲜鸡粪上，测定其除臭效果，并添加在鸡饲料中喂鸡，检查其对鸡粪性状，卵质和产卵成绩的影响，结果表明，木醋酸液有降低鸡粪氨气浓度的作用。在饲料中添加２％的木醋酸液不会降低卵质和产卵成绩，对鸡是安全的，而且还显示出了对鸡粪臭的掩蔽效果。 相似文献
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木醋酸添加剂的加工技术 总被引：1，自引：0，他引：1
研究证明,用常年青阔叶树能生产出湿度调节剂、水质净化剂、健康饮料和动物用的饲料添加剂等10多种产品,其中木醋酸液、粉是健康饮料和饲料添加剂中的佳品。在饲料中加 0.4％～1.0％的木醋酸粉喂淘汰蛋鸡,鸡肉的饱和脂肪酸和不饱和脂肪酸含量均优于对照区;在生产鱼+鸡肉的火腿肠时加木醋酸液,能取代防腐剂、着色剂,其制成品的蛋 相似文献
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木醋酸过去是用于有效消除家畜排泄物臭味的物质。其具体做法是,将木醋酸直接喷洒在排泄物上,或者与沸石混合添加到饲料中,或者与软质炭粉混合添加到饲料中,也可直接撒在畜床上面。据报道,这些方法可降低排泄物产生的氨浓度,减少臭味。另据报道,给鸡投喂食用醋可提高产蛋率, 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