共查询到20条相似文献，搜索用时 295 毫秒
1.
为了开发新型中药饲料添加剂,试验研究了日粮中添加不同剂量艾叶粉对肉鸡免疫器官指数及生长的影响。试验选择35日龄雏鸡120只,随机分为4组,每组30只。对照组饲喂基础日粮,试验组饲喂在基础日粮中分别添加2%、3%、5%的艾叶粉的试验日粮,试验期60 d。结果表明,试验至30 d时,日粮中添加不同剂量的艾叶粉对肉鸡脾脏和胸腺的发育均有显著的促进作用(P0.05),日粮中添加2%和3%的艾叶粉对肉鸡法氏囊的发育有显著的促进作用(P0.05);试验至60d时,3%的艾叶粉对肉鸡法氏囊的发育有促进作用(P0.05)。日粮中添加不同剂量的艾叶粉均能显著提高肉鸡的体重(P0.05)。艾叶粉能影响肉鸡的免疫系统,显著的促进其免疫器官的发育,并对肉鸡的生长有一定的促进作用;艾叶粉在肉鸡日粮中的最佳添加量为3%。 相似文献
2.
为了开发新型中药饲料添加剂,试验研究了日粮中添加不同剂量艾叶粉对肉鸡免疫器官指数及生长的影响。试验选择35日龄雏鸡120只,随机分为4组,每组30只。对照组饲喂基础日粮,试验组饲喂在基础日粮中分别添加2%、3%、5%的艾叶粉的试验日粮,试验期60 d。结果表明:(1)试验至30 d时,日粮中添加不同剂量的艾叶粉对肉鸡脾脏和胸腺的发育均有显著的促进作用(P<0.05),日粮中添加2%和3%的艾叶粉对肉鸡法氏囊的发育有显著的促进作用(P<0.05);试验至60 d时,3%的艾叶粉对肉鸡法氏囊的发育有促进作用(P<0.05)。(2)日粮中添加不同剂量的艾叶粉均能显著提高肉鸡的体重(P<0.05)。结论:艾叶粉能影响肉鸡的免疫系统,显著的促进其免疫器官的发育,并对肉鸡的生长有一定的促进作用;艾叶粉在肉鸡日粮中的最佳添加量为3%。 相似文献
3.
本试验旨在研究基础日粮中不同添加剂量的地衣多糖对肉鸡生长性能和免疫功能的影响。结果表明,各剂量地衣多糖能显著影响肉鸡日增重(P <0.05),并可以降低料肉比(P <0.05),地衣多糖对不同日龄组肉鸡的胸腺指数、法氏囊指数和脾脏指数影响差异均显著(P <0.05);28日龄前3个地衣多糖剂量组新城疫抗体与空白组比较差异显著(P <0.05);3个地衣多糖组与空白组相比能提高外周血淋巴细胞增殖(P <0.05)。综合上述结果,地衣多糖能显著提高肉鸡生长性能,具有免疫调节功能,且免疫调节与剂量相关。 相似文献
4.
中药饲料添加剂对肉鸡屠宰性能和肉品质的影响 总被引：1，自引：0，他引：1
《饲料研究》2016,(9)
试验以中药饲料添加剂研究现状作为科学依据,充分利用现代中药药学知识,科学配伍6种组方,以817肉鸡(以下简称为肉鸡)为试验对象,采用单因素随机分组,将570只肉鸡随机分为19组,设18个处理试验组和1个对照组。试验表明:中药饲料添加剂对肉鸡成活率有积极影响,大剂量不同组方复方中草药对于肉鸡屠宰性能、物理性能和化学性能影响各异。但在肌肉肌苷酸和鸟苷酸含量中药饲料添加剂组均与对照组比较显著差异(P0.05),说明中药饲料添加剂能改善肌肉风味物质含量。同时,多数中药饲料添加剂发酵后配方较不发酵配方对肉鸡生产性能和肉质品质均有积极影响。 相似文献
5.
6.
7.
试验建立了以碳酸镁、乙酰水杨酸、DL-赖氨酸制备一种复合镁饲料添加剂的方法,研究了其在日粮中添加不同剂量对肉鸡生长性能的影响。选用3日龄健康艾维茵商品代肉仔鸡360只,随机分成6个处理组,每处理6个重复,每重复10只,进行为期6周的饲养试验。6个处理分别为基础日粮、基础日粮+碳酸镁(等同于0.2%复合镁制剂含量)、基础日粮+乙酰水杨酸-DL-赖氨酸(等同于0.2%复合镁制剂含量)、基础日粮+0.1%复合镁制剂、基础日粮+0.2%复合镁制剂、基础日粮+0.3%复合镁制剂。结果表明:复合镁制剂对肉鸡有一定的促生长作用,在4～6周龄期间添加一定剂量的复合镁制剂,可以使肉鸡采食量和日增重显著提高(P<0.05);综合试验日粮中,添加不同剂量复合镁制剂对肉鸡生产性能的改善效果得出日粮中0.2%复合镁制剂的添加量是优选的有效剂量。试验通过对复合镁制剂的实验室检测和动物试验证明,其具有改善肉鸡生产性能的作用,通过加合反应制备复合镁制剂的方法是可行的。 相似文献
8.
9.
《黑龙江畜牧兽医》2017,(3)
为了研究中药代替抗生素作为饲料添加剂对于肉鸡屠宰性能和肉质品质的影响,试验以中药饲料添加剂研究现状作为科学依据,充分利用现代中药药学知识,科学配伍6种组方,以817肉鸡(以下简称为肉鸡)为试验对象,采用单因素随机分组方法将630只肉鸡随机分为21组,其中18个处理试验组、1个空白对照组和2个分别加入50 mg/kg、12.5 mg/kg抗生素添加剂组,饲养48 d后对试验肉鸡屠宰性能、肌肉的物理性能和化学性能进行测定。结果表明:中药饲料添加剂对肉鸡成活率有积极影响,大剂量不同组方复方中草药对于肉鸡屠宰性能、肌肉的物理性能和化学性能影响各异。肌肉肌苷酸和鸟苷酸含量中药添加剂组均与对照组比较显著差异(P0.05)。说明中药添加剂能改善肌肉风味物质含量。多数中药饲料添加剂发酵后配方较不发酵配方对肉鸡生产性能和肉质品质均有积极影响。试验中10组(配方三发酵处理后添加0.3%)改善效果最好,明显优于对照组(P0.05)。其他各组与对照组和抗生素组相比无明显差异。 相似文献
10.
中药制剂"心速宁"防治肉鸡猝死综合症的试验效果 总被引：1，自引：0，他引：1
自上世纪80年代以来,随着我市肉鸡饲养业的迅速发展,同时也带来了相应的难题,即肉鸡猝死症。据调查,肉鸡猝死发病率在3%以上,有的肉鸡饲养场、户严重时达10%。目前对肉鸡猝死症,国内外尚无较好的防治办法。本试验应用中药制剂对肉鸡猝死症进行初步防治试验,现报告如下。1材料与方法心速宁滴丸每丸40毫克,心速宁口服液每瓶装100毫升(均为天津中青兽药厂生产)。选用鸡西市西郊乡某肉鸡户饲养的AA品种肉鸡,每组试验选用同批、同龄的肉鸡。治疗:口服滴丸,随时发病随即服药。服药剂量每只鸡1丸,仅给1次。预防:一是药液稀释后饮用预防,即肉鸡生长… 相似文献
11.
12.
13.
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
14.
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
15.
16.
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
17.
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
18.
19.
20.
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