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1.
酶制剂对仔猪早期断奶后腹泻的影响 总被引：2，自引：0，他引：2
选用４４头２８±２日龄断奶的仔猪分为对照组和试验组。对照组饲喂基础日粮,试验组饲喂基础日粮＋０．ｌ%酶制剂。结果表明,试验组与对照组相比,平均日增重提高了５．８８%,平均日采食量降低了４．８４%,料肉比降低了１０．３８%;试验组的腹泻发生率、腹泻频率和死亡率分别降低了４．５５%(Ｐ＞０．０５)、２８．０６%(Ｐ＜０．０５)和６６．６４%(Ｐ＞０．０５);干物质、粗蛋白和粗纤维的消化率分别提高了３．１４%、１６．７７%和４５．１４%。提示日粮中添加酶制剂可弥补仔猪早期断奶后内源酶的降低,提高饲料转化率,促进仔猪生长,降低仔猪腹泻发生率和死亡率。 相似文献
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螺旋藻对断奶仔猪生产性能的影响研究 总被引：6，自引：0，他引：6
选用４０头３５日龄（出生相差不超过３ｄ）的杜长大三元杂交断奶仔猪按性别、体重平分成对照组和试验组，试验组用 １％螺旋藻代替１％的国产脱脂鱼粉进行为期１个月的饲养试验。结果表明：１％螺旋藻替代鱼粉添加到日粮中可提高断奶仔猪日增重１５．４１％（Ｐ＜０．０５），降低料重比９．９５％（Ｐ＜０．０５）；另外还可增进食欲、提高采食量３．９３（Ｐ＞０．０５）、减少断奶仔猪腹泻的发生。 相似文献
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利用合成氨基酸配制仔猪低蛋白日粮研究 总被引：3，自引：0，他引：3
选择４２ 日龄平均体重１１．００ｋｇ 的三元杂交断奶仔猪３０ 头, 随机分为对照组和试验组。分别饲喂２０％ 蛋白日粮（ 含异亮氨酸０－６４ ％ ） 和低蛋白（１６ ％ ） 低异亮氨酸（０－４１％ ） 日粮＋ 合成异亮氨酸（０－２３） 。试验结果： 试验组日增重和日采食量分别比对照组提高６ ．２ ％ 和１８ ％ （Ｐ＞０ ．０５） ,饲料增重比降低３ ．７％ （Ｐ＞ ０ ．０５） 。血清尿素氮、总游离氨基酸、葡萄糖、胰岛素和皮质醇含量组间无显著差异。血清氨含量试验组显著低于对照组（Ｐ＜ ０ ．０５） 。结论：通过合理补充合成氨基酸, 能够节约仔猪日粮蛋白质４ ％ ; 通过补充合成异亮氨酸, 血球粉在断奶仔猪日粮中的用量可提高至６％ 而不会降低仔猪生长性能。 相似文献
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饲用酶制剂能提高断奶仔猪的生长,试验通过在降低３％和５％营养水平的玉米－豆粕型日粮中添加“英恒”饲用酶制剂０．１％和０．０８％，探讨其对断奶仔猪生长性能的影响，试验表明：降低３％营养水平＋０．０８％酶制组的平均日增重比对照组提高２．４７％（Ｐ＞０．０５），料肉比降低６．９９％（Ｐ＜０．０５）；降低５％营养水平＋０．０８％酶制剂组的平均日增重比对照组提高１．５１％，料肉比降低４．４９％（Ｐ＞０．０５）；降低５％和３％营养水平添加０．１％酶制剂对断奶仔猪的增重无显著影响（Ｐ＞０．０５），但均能显著降低料肉比（Ｐ＜０．０５）。加酶各组的经济效益都有所提高，降低３％营养水平＋０．０８％的酶制剂和降低３％营养水平＋０．１％的酶制剂对照组相比经济效益都提高了８．２６％。／ 相似文献
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日粮中添加蜂花粉的试验组，与未添加的对照组，两组产蛋率分别为８７－７％ 和８０－２％ ，两组差异显著（Ｐ＜ ０－０５） ；平均蛋重分别为６２－５５±１－２２ｇ 和６２－５４ ±１－３１ｇ ，两组差异不显著（Ｐ＞ ０－０５） ；料蛋比分别为２－３５：１ 和２－５１：１，两组差异显著（Ｐ＜ ０－０５） ；试验组比对照组提高经济效益１５－７％ 。 相似文献
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本文对蛋氨酸铁螯合物的研制作一简单介绍,并对母猪和生长猪进行了饲喂试验,试验结果：蛋氨酸铁组比硫酸亚铁组仔猪初生重高５０克／头（Ｐ＞０．０５）,断奶重高０．６公斤（Ｐ＜０．０５）,产仔死亡率降低８．６％（Ｐ＜０．０５）,断奶成活率提高６．２％（Ｐ＜０．０５）,生长猪日增重提高９．５６％（Ｐ＜０．０５）,采食量提高１．８８％（Ｐ＞０．０５）,饲料报酬提高７．０９％（Ｐ＜０．０５）,生长猪血红蛋白含量增加２．３７克／１００毫升（Ｐ＜０．０５）。 相似文献
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早期断奶仔猪日粮中添加不同种类酸化剂的效果 总被引：49，自引：2，他引：47
选用杂种仔猪（杜洛克×长白×大白）１２５头，于２８±３日龄断奶，以玉米－豆粕－鱼粉型日粮饲喂，进行为期２８天的饲养试验，研究日粮中添加柠檬酸（１％）、磷酸（０．３％）及复合酸（０．３％和０．５％）对仔猪生产性能、日粮蛋白质消化率、胃肠道消化酶活力及肠道大肠杆菌数的影响。结果表明，日粮中添加各种酸化剂可提高仔猪日增重９－１７％（Ｐ＞０．０５）；日粮中添加柠檬酸和复合酸则可显著提高饲料转化效率１１－１５％（Ｐ＜０．０５）；日粮中添加０．３％磷酸可提高饲料利用效率８％（Ｐ＞０．０５）。添加酸化剂对日粮蛋白质消化率无影响。柠檬酸和磷酸有降低胃肠道ｐＨ值、提高胰蛋白酶、淀粉酶活力及减少结肠中大肠杆菌数的趋势。 相似文献
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６６头体重２０ｋｇ左右的仔猪分成２组，每组３个重复，每个重复１１头，分别饲喂含抗生素和低聚果糖日粮，研究其对仔猪生长性能的影响。结果表明，与抗生素组相比，添加０．１５％低聚果糖组日增重提高４．７１％（Ｐ〉０．０５），采食量提高５．８６％（Ｐ〉０．０５），饲料转化率降低１．２％（Ｐ〉０．０５），生物学综合评定值提高１．８％。由此可见，低聚果糖可替代抗生素应用于仔猪饲饲粮中。 相似文献
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本试验采用随机分组的设计方法,选用５ ～１０ｋｇ 体重范围的长×大二元杂交断奶仔猪６０ 头,随机分为３ 个组,每组２０ 头。试验１ 组添加０ ．０２ ％ 益生健,试验２ 组添加０ ．０５ ％ 的益生健,对照组则不添加。在一致的饲养条件下进行了添加 该微生态调 节剂对仔猪 饲喂效果的 试验,试验期 ３１ 天。结 果表明：试验１ 组的平均头日增重与饲料利用率比对照组分别提高了１３ ．１２ ％ 和８ ．１６ ％ ,腹泻率由４ ．９６ ％ 降低为３ ．０５ ％ ;试验２ 组的平均头日增重与饲料利用率比对照组分别提高了１２ ．９７ ％ 和１０ ．８８ ％ , 腹泻率则由４ ．９６ ％ 下降为３ ．１５ ％ 。在断奶头１ 周２ 个试验组仔猪的采食量明显大于对照组,这说明添加益生健可明显改善仔猪日粮的适口性和可消化性。而在２ 个试验组中添加０ ．０５ ％ 的试验２ 组比添加０ ．０２ ％的试验１ 组的饲料利用率稍高。 相似文献
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选择９６头三元杂交仔猪分为两组，试验组饲喂以新技术配制的日粮，对照组喂常规日粮。结果表明，断奶前两组生产性能没有显著差异，断奶后一周，试验组日增重提高９７ｇ（Ｐ＜０．０５），每千克增重少耗料０． ２２ｋｇ（Ｐ＞０． ０５），腹泻率降低 １１． ２４％。对照组的断奶应激对以后的生产性能产生一定影响。 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