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复方穿心莲对AA+肉鸡肠黏膜结构的影响 总被引：1，自引：0，他引：1
本试验旨在研究复方穿心莲对AA+肉鸡肠道黏膜结构的影响。将1日龄240只AA+肉仔鸡随机分为A、B、C、D 4组,试验组添加不同浓度的复方穿心莲,饲喂至42日龄,取7、35和42日龄肉鸡肠道组织,制成切片测量其绒毛长度、隐窝深度、肠壁厚度。结果表明,与空白组相比,A、B组肉鸡7、35和42日龄肠绒毛长度显著增加（P＜0.05）;隐窝深度显著降低（P＜0.05）;C组肉鸡35日龄肠壁厚度显著（P＜0.05）高于其它组。复方穿心莲能明显增加AA+肉鸡绒毛长度,降低隐窝深度和肠壁厚度。 相似文献
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将420只1日龄肉仔鸡随机分为6组,每组2个重复,每个重复35只,试验期为42d,试验将苦豆籽粕-双歧杆菌合生元混于肉仔鸡饲料中,每周龄末清晨7:00空腹称量体质量,计算平均日增重;结算饲料消耗量,计算平均日采食量;根据试验期增重量和耗料量,计算料肉比;分别于7、14、21、28、35、42日龄每组随机抽取10只剖杀,制作小肠各肠段组织切片,测量肠黏膜绒毛高度、隐窝深度和黏膜厚度。结果显示:苦豆籽粕-双歧杆菌合生元能显著提高肠黏膜绒毛高度、黏膜厚度和V/C值(绒毛高度/隐窝深度)、降低隐窝深度(P0.05)。结果表明:肉鸡饲料中添加苦豆籽粕-双歧杆菌合生元可以改善肉仔鸡的肠道组织结构的形态发育,从而提高肉鸡的生产性能。 相似文献
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试验旨在研究中药复方制剂对高温下肉鸡小肠黏膜厚度、绒毛长度、隐窝深度的影响。选用1日龄美国艾维茵白羽肉鸡180只为试验对象,随机分成3组,分别为高温对照组、中药1组、中药2组,每组设4个重复,每个重复15只鸡。试验期为42 d,分两个阶段:1~21日龄和22~42日龄。在21、42日龄取材,采用组织切片及组织化学染色方法检测肉鸡十二指肠、空肠、回肠的黏膜厚度、绒毛长度与隐窝深度。结果表明:在21、42日龄,与对照组相比,添加中药复方Ⅰ和中药复方Ⅱ后,肉鸡十二指肠、空肠和回肠的黏膜厚度和绒毛长度显著增加(P<0.05);十二指肠和回肠隐窝深度显著下降(P<0.05),空肠隐窝深度在21日龄时有升高趋势,42日龄差异不显著(P>0.05)。以上结果提示添加中药复方可显著改善高温应激条件下肉鸡的小肠黏膜形态结构。 相似文献
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试验选择120只1日龄罗丝308商品肉鸡,随机分为4个处理组,每个处理组3个重复,每个重复10只鸡。对照组饲喂基础日粮,试验AWEⅠ组、AWEⅡ组和AWEⅢ组分别在基础日粮中添加100、300和500mg/kg沙葱乙醇提取物(AWE),以研究沙葱乙醇提取物对肉仔鸡小肠黏膜发育的影响。结果表明,添加500mg/kgAWE可显著提高28日龄肉仔鸡十二指肠绒毛长度及42日龄肉仔鸡空肠绒毛长度(P<0.05)。对照组及各试验组小肠绒毛宽度和隐窝深度无显著差异(P>0.05)。日粮添加沙葱乙醇提取物对肉仔鸡十二指肠V/C比值有显著提高作用(P<0.05),各试验组十二指肠V/C比值显著高于对照组(P<0.05)。28日龄时各试验组空肠V/C比值及回肠V/C比值显著高于对照组(P<0.05)。上述结果显示,在日粮中添加沙葱乙醇提取物对肉仔鸡小肠黏膜的正常发育有一定促进作用,增强了小肠的吸收能力,其中以500mg/kgAWE的添加效果最佳。 相似文献
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试验旨在研究饲料中添加不同剂量的卷心菜浆液对肉鸡生长性能和肠道发育的影响。选取健康、体重相近的1日龄肉仔鸡240只,随机分为4组,每组5个重复,每个重复12只鸡。对照组饲喂基础日粮,试验Ⅰ组、Ⅱ组和Ⅲ组分别在基础日粮中添加10、15、20 g/kg卷心菜浆液,试验期42 d。于试验第21、42天分别称重、计算采食量,采集十二指肠、空肠、回肠检测肠道发育指标。结果表明:与对照组相比,试验Ⅲ组22～42日龄的采食量、日增重显著提高(P0.05);与对照组相比,饲粮中添加15、20 g/kg卷心菜浆液,能够显著提高肉仔鸡21日龄的十二指肠绒毛长度、绒毛/隐窝比和42日龄的绒毛长度(P0.05),饲粮中添加20 g/kg卷心菜浆液,能够显著提高肉仔鸡21日龄的空肠绒毛长度、隐窝深度和42日龄回肠平滑肌厚度(P0.05)。提示在试验条件下,饲粮中添加卷心菜浆液,可改善肉鸡肠道发育状况,20 g/kg为较合适的添加剂量。 相似文献
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研究了日粮中添加不同配比油脂对肉仔鸡小肠形态的影响。试验选取324只1日龄AA肉鸡,随机分成6组,每组6个重复,每个重复9只。CON为对照组(饲喂基础日粮),SO组为正对照组(日粮添加豆油),LO组为负对照组(日粮添加猪油),COP、COC、COV组分别在日粮中添加以棕榈油为主的配比油脂、以椰子油为主的配比油脂和多种植物油配比的油脂,饲养至21日龄。结果:COP组的十二指肠和空肠的绒毛高度与隐窝深度的比值高于SO组(P<0.05),空肠的隐窝深度低于CON和SO组(P<0.05)。COC组的十二指肠绒毛宽度高于SO组和LO组(P<0.05),绒毛面积高于CON组、SO组和LO组(P<0.05);空肠的黏膜厚度高于LO组(P<0.05)。COV组的十二指肠绒毛高度高于CON组、SO组和LO组(P<0.05),十二指肠黏膜厚度高于CON组(P<0.05)。试验表明3种配比油脂均可从不同角度促进十二指肠和空肠的形态发育,且从提高绒毛表面积考虑,配比椰子油效果最好。 相似文献
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选用1日龄的雌性岭南黄肉鸡99只,随机分为3组,分别为对照组、试验Ⅰ组和试验Ⅱ组,每组33只。对照组常规饲养,试验Ⅰ组和Ⅱ组分别在饮水中添加0.012 mL/L和0.020 mL/L的茶树油,试验至45日龄结束。解剖取十二指肠、空肠、回肠进行HE染色和PAS染色,观察小肠黏膜形态、上皮内淋巴细胞及杯状细胞数目。结果显示,2个试验组与对照组相比,各段小肠的绒毛长度增加,肠壁变薄,隐窝深度变浅,肠绒毛高度/隐窝深度比值增加;2个试验组的上皮内杯状细胞和淋巴细胞的数目高于对照组。结果表明,茶树油能够改善肉鸡小肠黏膜结构,增加小肠上皮内免疫细胞数量,提示茶树油对肉鸡的肠道吸收和肠道免疫功能具有增强作用。 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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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
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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