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探讨不同剂量的稀土添加剂对断奶湘东黑山羊血液理化指标的影响。选27头断奶湘东黑山羊随机等分为对照组、试验1组和2组,试验1组按10 mg/kg体重,试验2组按15 mg/kg体重剂量的稀土,隔天饮水1次。补饲30 d后采血,进行血液葡萄糖(Glu)、总脂(TL)、总蛋白(TP)、非蛋白氮(NPN)、白蛋白(A)、血红蛋白(Hb)、球蛋白(G)、酸碱度(pH)及谷丙转氨酶(GPT)、谷草转氨酶(GOT)的测定。结果表明:试验组测定指标除G和Hb外,较对照组有所提高;2组GOT值组间差异显著(P<0.05);其检测值,组间差异不显著(P>0.05),但与对照组比较,TL、TP、A、G、pH、GPT、GOT值差异显著(P<0.05),Glu、NPN、Hb值差异不显著(P>0.05)。 相似文献
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按照年龄、体重、性别等相近的原则选取日龄和体重相似的72头杜长大三元猪,配对随机分为4组,每组18头,组内设三个重复,每个重复6头仔猪（3♂＋3♀）。4个组分别在基础日粮中添加0mg／kgGABA（对照组）、50mg／kgGABA（试验Ⅰ组）、100mg／kgGABA（试验Ⅱ组）和120mg／kgGABA（试验Ⅲ组）。预试期7d,试验期30d。试验结果表明：在育肥猪日粮中添加50mg／kg、100mg／kg和120mg／kgGABA,日增重分别比对照组提高8．09％（P〉0．05）、13．47％（P〈0．05）和11．41％（P〈0．05）,降低料肉比5．98％（P〉0．05）、7．17％（P〈0．05）和5．58％（P〈0．05）;各试验组可以提高血清中总蛋白（TP）的含量（P〉0．05）和葡萄糖（GLU）的含量（P〈0．05）,同时降低血清中尿素氮（SUN）的水平（P〈0．05）;日粮中添加50mg／kg、100mg／kg和120mg／kgGABA平均每头猪净收入分别比对照组多j2．97元／头、51．19元／头和19．15元／头。GABA能明显提高育肥猪的日增重和饲料转化率,改善育肥猪的营养物质的代谢效率。综合提高养猪的经济效益,因此在育肥猪日粮中添加GABA具有重要的现实意义。 相似文献
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将80只昆明小白鼠随机分为4组（每组20只）：空白对照组（Ⅰ组）、三聚氰胺高剂量组（300mg／kg）（Ⅱ组）、三聚氰胺中剂量组（150mg／kg）（Ⅲ组）和三聚氰胺低刺量组（37．5mg／kg）（Ⅳ组）,试验周期为30d。试验期内观察小白鼠一般情况、体质量变化及食物利用率。结果显示：三聚氰胺染毒组小鼠体增重缓慢,食物利用率极显著降低（P〈0．01）;Ⅱ、11组小鼠血清ALT、AST、BUN、Cr和UA值显著高于Ⅰ组（P〈O．05）,Ca和P显著低于Ⅰ组（P〈0．05）;Ⅱ组小鼠肝、肾指数显著高于I组（P〈0．05）,Ⅱ、Ⅲ组脾指数显著低于Ⅰ组（P〈o．05）;Ⅱ、Ⅲ组小鼠肺、肝、脾、肾及膀胱有病理变化。结果表明,三聚氰胺亚慢性毒性会影响动物生长,造成肺、肝、肾及脾损害。 相似文献
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试验将1日龄艾维菌肉鸡健雏200只随机分为4组,分别喂以基础日粮（Zn 100mg／kg,A组）、高锌日粮Ⅰ（Zn1500mg／kg,B组）、高锌日粮Ⅱ（Zn2000mg／kg,C组）和高锌日粮Ⅲ（Zn2500mg／kg,D组）,试验期为7周。结果表明：B组血清碱性磷酸酶（AKP）活性显著升高（P〈0．05）,D组显著降低（P〈0．05）;血清碱性磷酸酶的同工酶亦受到不同程度的影响;谷丙转氨酶（GPT）、淀粉酶（AMY）活性各试验组显著升高（P〈0．05）;肌酸激酶（CK）活性在试验初期升高,中期不同程度降低（P〈0．05）,试验结束时与对照组无显著差异（P〉0．05）;血清总蛋白（TP）、球蛋白（GLB）含量随锌水平的升高而升高,白蛋白（ALB）含量下降,但均与对照组比较差异不显著（P〉0．05）;血清锌含量随饲料锌水平增高而显著升高（P〈0．05）;血清中钙、磷含量则与饲料锌水平呈负相关。 相似文献
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饵料中添加酵母水解物对中华鳖成鳖的诱食效果 总被引：1，自引：0，他引：1
本研究选用平均体重为197g的1320只中华鳖成鳖，随机平均投放于4个饲养池中，分别投喂含酵母水解物0mg／kg（对照）、500．0mg／kg（Ⅰ组）、1000．0mg／kg（Ⅱ组）、1500．0mg／kg（Ⅲ组）、2000．0mg／kg（Ⅳ组）和2500．0mg／kg（Ⅴ组）的饵料。通过测定摄食量和摄食速度，比较酵母水解物在饵料中的不同添加量对中华鳖的诱食效果。试验结果表明，当酵母水解物的添加量在1000．0-2000．0mg／kg的范围内，酵母水解物对中华鳖的诱食效果均显著（P〈0．05）优于未添加组，而且酵母水解物在饵料中的添加量以2000．0mg／kg的饵料组具有最佳的诱食效果，经过对4个饲养池的观察，中华鳖的采食量为165～173g／2h，采食速度为1．39～1．45g／min之间。 相似文献
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不同剂量的维生素E对产蛋后期蛋种鸡繁殖性能的影响 总被引：1，自引：0，他引：1
此试验选择50周龄海兰褐父母代种母鸡452只,公鸡18只,随机分为6组。对照组饲喂基础日粮,试验组在基础日粮上分别添加维生素E501U／kg、1001U／kg、175IU／kg、2501U／kg、5251U／kg。结果表明：①对照组产蛋率与试验Ⅰ、Ⅴ组差异不显著（P〉0．05）,与其他各组差异显著（P〈0．05）;试验Ⅰ组和Ⅴ组料蛋比分别比对照组提高了2．54％、1．0％,试验Ⅱ,Ⅲ、Ⅳ组分别比对照组降低了15．48％、7．97％、19．25％,试验Ⅳ料蛋比最低。试验各组的平均采食量与对照组差异均不显著（P〉0．05）;②试验Ⅰ组与其他各组差异显著（P〈0．05）,试验其他组间差异不显著（P〉0．05）;试验各组种鸡产蛋后期入孵蛋孵化率、受精蛋孵化率、死胎率与对照组相比差异不显著（P〉0．05）;⑤种鸡产蛋后期种蛋合格率试验Ⅱ、Ⅴ与其他各组差异显著（P〈0．05）;试验Ⅱ组破软蛋率与其他各组相比差异显著（P〈0．05）,其他各组间差异不显著（P〉0．05）;试验各组畸形蛋率差异不显著（P〉0．05）。 相似文献
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稀土添加剂对湘东黑山羊育肥性能的影响 总被引：3，自引：0，他引：3
试验Ⅰ、Ⅱ组湘东黑山羊分别用添加15mg/kg体重、10mg/kg体重的稀土日粮，试验Ⅲ组为对照组（不添加稀土）进行育肥试验。对试验Ⅰ、Ⅱ组的日增重、料重比与试验Ⅲ组进行F检验，组间差异显著（P＜0.05）。试验Ⅰ、Ⅱ组的经济效益分别比对照Ⅲ组提高12.93%和8.14%，且试验Ⅰ组高于Ⅱ组4.79%，结果表明：日粮中以每kg体重添加15mg的稀土对湘东黑山羊育肥效果为佳。 相似文献
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脂肪乳化剂对肉鸡生长性能和脂肪代谢的影响 总被引：1，自引：0，他引：1
试验选用400只哈巴德黄羽肉鸡,随机分为4组,每组4个重复,每个重复25只鸡,对照组饲喂基础日粮,试验Ⅰ组添加250mg／kg蔗糖酯和单甘酯的混合物（混合酯）,试验Ⅱ组添加500mg／kg混合酯,试验Ⅲ组添加500mg／kg大豆卵磷脂。试验结果表明：肉鸡日粮中添加250mg／kg混合酯和500mg／kg大豆磷脂可显著提高肉鸡生长性能（P〈0．05）,添加250mg／kg混合酯能显著提高肉鸡粗脂肪的消化率（P〈0．05）,添加250mg／kg混合酯和500mg／kg大豆磷脂可显著降低肉鸡血清甘油三酯（TG3）含量,提高血清游离脂肪酸（VFA）含量,添加乳化剂对肉鸡血清总胆固醇（TC）、高密度脂蛋白胆固醇（HDL-C）和低密度脂蛋白胆固醇（LDL-C）水平无显著影响。 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