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广西山羊毛几种微量元素含量的测定 总被引：1，自引：0，他引：1
对广西12个县(市)的山羊毛中7种微量元素Co、Cu、Zn、Mn、Fe、Se、I含量进行了测定。结果表明。其微量元素Se、Mn、Cu的含量较高，不同毛色、不同地区的山羊毛微量元素含量有差异，而年龄、性别之间的差别不大。 相似文献
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采用HNO3-HCLO4(体积比4:1)的消解体系,在常压低温微沸条件下消解,用火焰原子吸收光谱法(FAAS)测定了牛蛙体内8种组织器官(肾脏、肝脏、皮肤、心脏、肺脏、精巢、卵巢、肌肉)中Fe、Mn、Zn、Cu的含量.方差分析结果表明:牛蛙体中4种微量元素含量高低为Fe＞Zn＞Mn＞Cu;4种微量元素在牛蛙各组织器官中的含量均差异极显著(P＜0.01).相关性分析表明:Fe和Mn含量呈显著负相关(P＜0.05),相关系数为-0.414;Fe和Cu的含量呈极显著正相关(P＜0.01),相关系数为0.855;Mn和Cu的含量呈极显著负相关(P＜0.01),相关系数为-0.584. 相似文献
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为了查找种公牛精液品质下降的原因并探讨精液品质与微量元素的关系,试验测定了种公牛基础日粮及血液、被毛、精液中锌(Zn)、铜(Cu)、铁(Fe)、锰(Mn)、铬(Cr)5种微量元素含量。结果表明:饲料中Zn、Cu含量明显低于美国NRC推荐标准,Fe、Mn、Cr三种元素能满足种公牛的营养需要;精液品质正常牛及异常牛血液、被毛、精液中Fe、Mn、Cr差异不显著(P>0.05),被毛、血液中Zn、Cu两种元素含量差异显著(P<0.05),精液中Zn元素含量差异极显著(P<0.01)、Cu元素含量差异显著(P<0.05)。 相似文献
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产奶量对热应激和非热应激期奶牛体内微量元素影响的研究 总被引：3，自引：1，他引：3
研究产奶量对热应激和非热应激期间奶牛血液、乳、和毛中微量元素的影响.结果表明,①测到全血中7种微量元素中,在非热应激期间,产奶量为10～20 kg时,奶牛血液中Zn、Mn的含量明显增加（P＜0.05）,Fe的含量减少,差异显著（P＜0.05）.热应激期间,Fe、Cu的含量随产奶量增加逐渐减少,Zn含量增加,其它元素的含量无规律性变化.在热应激期,随奶牛的产奶量的增加,排泄到乳中的Zn也明显增加.非热应激反应的牛,随着产奶量的增加,而排泄到乳中的Cr明显增加（P＜0.05）,而热应激反应牛,Cr含量有明显下降的趋势（P＜0.05）,高产奶牛的乳中Se含量明显高于低产牛的（P＜0.05）,在产奶量为5-10 kg时排泄到乳中Mn的含量比其它产奶阶段有明显增加（P＜0.05）.在非应激期,不同的产奶量对毛中Fe、Cr、Se有明显的影响（P＜0.05）.对毛中的Zn、Co、Cu、Mn无明显影响.在热应激期,不同的产奶量对毛中Fe、Se、Co分布影响极明显（P＜0.01）. 相似文献
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以异育银鲫为试验对象,在实用饲料中按照L9(34)正交设计方案补充Fe、Cu、Mn、Zn,经过60 d养殖后,分析鱼体器官、组织与饲料中Fe、Cu、Mn、Zn 4种微量元素的含量、相互比例的相关性。试验结果表明,Fe、Cu、Mn、Zn在鱼体各器官、组织中具有明显的分布特征:鳍中的Fe、Mn、Zn,头骨中的Cu、Mn、Zn,心脏、肝胰脏、脊椎骨中的Fe、Cu,全鱼Cu、Zn,脾中Cu、Mn,肾脏中Mn、Zn,肌肉、卵、肠中Cu,鳃骨中的Zn,鳞中的Mn受饲料中相应元素供给量的影响很大;鱼体器官、组织中Fe、Cu、Mn、Zn比例模式有3种基本类型,脾、肌肉、脑、心脏、肾脏和全鱼属于Fe比例高的类型(称为高Fe型),与饲料中的Fe、Cu、Mn、Zn比例模式非常相近,具有显著的相关性;脊椎骨、鳃骨、肠、头骨和鳍中Fe、Zn两者比例比较接近,属于Fe、Zn比较高的类型(称为高Fe、高Zn型),而鳞和卵属于Zn比例高的类型(高Zn型),这两类类型的Fe、Cu、Mn、Zn比例与饲料中比例模式相关性差。 相似文献
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矿物质元素对斑点叉尾(鱼回)生长的影响 总被引：1，自引：0，他引：1
按照L12(211)正交表设计11种微量、常量矿物质元素12种组合的配合饲料,进行54 d的室内养殖试验.结果表明在现有的斑点叉尾(鱼回)微量、常量矿物质元素需要量的基础上,Mn、Cu、Co、Mg增加50%用量后显著促进了斑点叉尾(鱼回)的生长速度;酵母Cr的添加(0.5 mg/kg)非常显著地抑制了生长速度,在斑点叉尾(鱼回)饲料中不能添加Cr;Zn、Fe 、I用量增加显著抑制了生长速度,在实际使用时不能增加用量.Fe、Zn、I、Se、P的用量增加将使斑点叉尾(鱼回)的饲料系数也增加,尤其是Fe、Zn、I、Se较为明显;而Cu、Mn、Co、Cr、Ca、Mg用量的增加使饲料系数降低.Fe、Cu、Mn、Co、I、Mg使内脏比增加,以Fe最为明显;而Zn、Se、Cr、Ca、P使内脏比减少,以Cr最为明显.Fe、Zn、I的增加可使体长/体重比增加、使体长生长快于体重的增长,其结果使鱼体向"长条形"发展;而Cu、Mn、Co、Se、Cr、Ca、P、Mg的增加使体长/体重的值减小,可使体重的增长大于体长的生长,使鱼体向"肥"、"粗壮"体型发展.综合分析以第5组的组合最佳,使斑点叉尾(鱼回)的生长速度比第1组高30%、饲料系数低21%. 相似文献
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采用电感耦合等离子体质谱法(ICP-MS)对沈阳某地区稻壳粉与玉米芯进行元素分析,二者均含有Ca、P、Na、Mg、Se、Zn、Mn、K、Cu、Fe等微量元素,方法回收率在90.4%~108%之间。将稻壳粉和玉米芯中部分微量元素与瘦肉型生长育肥猪饲料国家标准进行对比发现,稻壳粉及玉米芯中均含有瘦肉型生长育肥猪饲料所需微量元素,但Ca、P、Na、Mg、Se、Zn含量均低于国家标准。稻壳粉中,K、Fe含量略低,Cu含量达标,但Mn元素含量远远高出国家标准,摄入过多会导致中毒现象发生;玉米芯中,K、Cu、Fe、Mn元素含量均可达到国家标准。因此,在进行饲养瘦肉型生长育肥猪时,应选用玉米芯来进行喂养,同时可添加含有Ca、P、Na、Mg、Se、Zn元素的营养物质进行辅助喂养。 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