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本试验旨在研究藤茶中二氢杨梅素(dihydromyricetin,DMY)对瑶山鸡免疫器官指数、血清生化指标及胸肌品质的影响。选用健康的40日龄贵州瑶山鸡96只,随机分为4个处理组,每个处理组3个重复,每个重复8只鸡。Ⅰ组饲喂基础日粮,试验Ⅱ、Ⅲ、Ⅳ组分别饲喂添加了0.025%、0.05%和0.1% DMY 的基础日粮,试验期70 d。结果显示,日粮中添加0.05% DMY极显著提高了瑶山鸡的胸腺指数(P<0.01),各试验组对脾脏指数和法氏囊指数的影响差异均不显著(P>0.05);日粮中添加不同剂量的DMY对血清白蛋白(ALB)、总蛋白(TP)含量无显著影响(P>0.05),但添加0.05% DMY可显著降低血清中谷草转氨酶(GOT)活性(P<0.05),也显著提高了血清溶菌酶活性(P<0.05);DMY可极显著降低瑶山鸡胸肌的剪切力和滴水损失(P<0.01),但对肌肉pH、肉色、熟肉率影响差异均不显著(P>0.05)。结果表明,日粮中添加DMY可在一定程度上促进瑶山鸡的免疫器官发育,提高免疫功能及肝细胞进行物质代谢的功能,并改善瑶山鸡的胸肌品质。 相似文献
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二氢杨梅素对肉仔鸡生长性能、免疫器官指数及血液生化指标的影响 总被引:2,自引:0,他引:2
1日龄AA肉公雏300只,随机分为5个组,每组6个重复,每个重复10只鸡。试验Ⅰ、Ⅱ、Ⅲ、Ⅳ、Ⅴ组在基础日粮中分别添加0%、0.025%、0.05%、0.1%和0.25%的二氢杨梅素(DMY),研究DMY对肉仔鸡生长性能、免疫器官指数及血液常规理化指标等影响。结果表明:1)日粮中添加不同剂量的DMY对肉仔鸡日增重有提高的趋势,0.05%的DMY显著提高肉仔鸡饲料转化率(P<0.01);试验期间,各组试验鸡生长发育正常,各组织器官未见异常。2)0.05%DMY显著提高21d肉仔鸡法氏囊指数(P<0.05);3)0.25%DMY组显著降低21d肉仔鸡血清总蛋白、白蛋白含量,对球蛋白无显著影响;4)0.025%、0.05%DMY显著降低21d肉鸡血清谷丙转氨酶(GPT)活性(P<0.05,P<0.01),0.025%~0.1%剂量的DMY能显著降低42d肉鸡血清GOT活性(P<0.05);5)各剂量的DMY对21、42d肉鸡血清谷草转氨酶(GOT)无显著影响。 相似文献
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《饲料工业》2016,(4)
试验旨在研究二氢杨梅素(Dihydromyricetin,DMY)对鲤鱼的生长性能、形体指标、抗氧化活性及全鱼鱼体组成的影响。选取120尾体重相近的鲤鱼,随机分为5个组,每个组3个重复,每个重复8尾。以基础日粮组作为对照组,试验组在基础日粮中分别添加浓度为0.075%、0.10%、0.125%、0.25%DMY,试验期为64 d。试验结果表明:不同浓度的DMY对鲤鱼的生长性能和形体指标有促进作用,添加0.125%和0.25%DMY极显著提高了鲤鱼WGR(P0.01),添加0.25%DMY使其SGR显著提高(P0.05),添加0.075%、0.10%、0.125%、0.25%DMY各浓度使其FCR极显著降低(P0.01),添加0.125%和0.25%DMY使其HSI、CF极显著提高(P0.01)。不同浓度的DMY可以提高鲤鱼血清的抗氧化性,添加0.25%的DMY使其SOD活性显著增强(P0.05)、CAT活力显著降低(P0.05);添加0.075%、0.10%、0.125%、0.25%DMY使其MDA含量极显著降低(P0.01)。添加不同浓度DMY对鲤鱼全鱼鱼体组成没有显著性影响(P0.05),但是在一定程度上也有改善的作用。 相似文献
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本试验旨在研究二氢杨梅素(DMY)对内仔鸡肠黏膜形态结构及碱性磷酸酶(AKP)活性的影响.420只0日龄AA肉仔鸡雄雏,随机分为5个处理组,日粮中分别添加0%、0.025%、0.05%、0.1%和0.2%的DMY.试验期42d.结果表明,日粮添加0.025%的I)MY可显著提高肉仔鸡日采食量和日增重(P<0.05),并可使料重比降低了6.6%(P>0.05);添加0.025%~0.05%Gj DMY可显著提高肉仔鸡肠上皮细胞碱性磷酸酶活性(P<0.05),提高小肠绒毛高度和黏膜厚度,降低小肠隐窝深度(P<0.05). 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