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试验探讨在不同精粗比日粮中添加中草药对滩羊增重、肉理化性能、血液生化及免疫指标的影响。试验1组日粮精粗比为1.59,不添加中草药添加剂;试验2、3、4组日粮精粗比分别为1.59、2.31、0.98,且添加0.65%中草药添加剂。结果表明:各试验组间增重、日增重差异不显著(P>0.05)。试验3组增重和日增重高于试验2组和试验4组;饲喂中草药添加剂的试验2、3、4组IgA、IgG、IgM、WBC、LYM指标均高于不添加中草药添加剂的试验1组,且试验4组IgA、IgG、IgM、WBC、LYM均高于其他各组。试验90 d,试验4组与试验3组之间白细胞差异显著(P<0.05),试验30 d与试验90 d,试验3组淋巴细胞差异显著(P<0.05),试验4组淋巴细胞差异显著(P<0.05),中草药添加剂与合适的精粗比日粮可显著提高滩羊的血液生化指标和免疫水平;试验4组与试验3组间熟肉率差异显著(P<0.05),试验3组与其他各组pH值差异显著(P<0.05),且在各组中最高。说明滩羊育肥期日粮中添加0.65%中草药添加剂精粗比为0.98对其增重、肉理化性能、血液生化及免疫指标效果较好。 相似文献
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试验旨在探索不同精粗比日粮对乌珠穆沁羊生长性能、屠宰性能及肉品质的影响。试验选用体况健康、体重相近(25.04±0.65kg)的30头乌珠穆沁羯羊随机分为3组,每组10个重复,每个重复1只羊。对照组饲喂草颗粒(CK),2个试验组分别饲喂精粗比为40∶60(TMR1)、60∶40(TMR2)的日粮。结果表明:对照组采食量和平均日增重显著低于其他2组;全混合日粮1组和2组的胴体重、屠宰率和净肉重均显著高于对照组,但全混合日粮1组和2组之间差异不显著,全混合日粮2组羊肉中脂肪含量显著高于其他2组;全混合日粮2组的熟肉率显著低于对照组和全混合日粮1组;全混合日粮2组的剪切力低于对照组和全混合日粮1组。在本试验条件下,不同精粗比日粮对乌珠穆沁羊生产性能、屠宰性能和肉品质的影响较大,其中全混合日粮1组舍饲乌珠穆沁羊效果较佳。 相似文献
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为探讨不同精粗比日粮对海南黑山羊生长性能,血液指标及经济效益的影响,选取身体健康体重约10kg生长期海南黑山羊30只,随机分为6组,分为对照组CK(精料、粗料分开饲喂,精粗比50∶50)、全混合日粮组(40∶60,45∶55,50∶50,55∶45,60∶40),每组5只羊,试验期30d。结果显示,饲喂全混合日粮可以显著提高平均日增重、总增重,降低料重比(P0.05),对采食量影响不显著(P0.05),精粗比40∶60处理组,平均日增重、总增重最高,料重比最低。不同处理试验羊血液白蛋白、谷丙转氨酶、谷草转氨酶和碱性磷酸酶含量差异均不显著(P0.05),血液总蛋白、球蛋白、胆固醇、甘油三酯、尿素、葡萄糖含量有不同的影响(P0.05)。饲喂全混合日粮提高了纯收入、投入产出比,精粗比40∶60处理组经济效益最好。综合考虑生长性能、血液指标和经济效益,海南黑山羊饲喂全混合日粮优于精料、粗饲料分开饲喂,精粗比为40∶60的全混合日粮时,生长性能、经济效益最好。 相似文献
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本试验以辽宁绒山羊种公羊为对象研究了日粮能量、蛋白质水平对种公羊精液品质的影响.采用单因子随机试验设计,将18只成年种公羊按照采精量、产绒量和年龄平均分为3组,每组6只.日粮设两种蛋白质水平(360 g和310 g),能量设两个水平(19 MJ和16 MJ),组合成3种饲粮:高能量高蛋白组(HEHP)、高能量低蛋白组(HELP)和低能量低蛋白组(LELP).3组种公羊分别随机对应3种饲粮.结果表明,日粮蛋白质水平显著影响采精量、密度、有效精子数和冻精产量,日粮能量水平对采精羊百分率有显著影响,日粮能量和蛋白质水平对鲜精活力和冻精活力无显著影响,高能量高蛋白组的精子产量、采精羊百分率、精子活力最高.种公羊配种期日粮能量蛋白质的适宜水平分别为19 MJ和360 g. 相似文献
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在能量浓度相近,粗蛋白水平一致的前提下,研究不同精粗比全混合日粮（TMR）对休闲期雄性梅花鹿尿中嘌呤衍生物（PD）排泄量及体增重等生产性能的影响。采用4x4拉丁方设计,全混合日粮精粗比分别是A组65：35,B组55：45,C组45：55,D组35：65。试验结果表明：TMR精粗比对休闲期梅花鹿尿囊素、尿酸、PD日排出量影响显著（P〈0．05）,对黄嘌呤＋次黄嘌呤、肌酐日排出量影响不显著（P〉0．05）,精粗比55：45时尿囊素日排出量最大,其他3组差异不显著（P〉0．05）,尿酸、PD日排出量在精粗比45：55的C处理组最大,其他3组差异不显著（P〉0．05）;TMR精粗比对休闲期梅花鹿饲料单价、试验期饲料成本、平均日增重、体增重、料肉比及体增重成本均存在明显影响,特别是平均日增重差异显著（P〈0．05）,每千克体增重饲料成本相差极大,精粗比35：65约是精粗比45：55的2倍。 相似文献
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本研究旨在分析全混合日粮饲喂技术与传统的精粗分饲对育肥肉牛增重效果、产肉性能及经济效益的影响。采用完全随机单位组设计方法,选择体重(455±10)kg、年龄相近的西门塔尔杂交品种育肥牛14头,随机分为2组,分别为精粗分饲组(对照组)与全混合日粮组(试验组),两组只是在饲喂方式的不同,其余饲养管理条件均一致,试验期153 d。结果表明:(1)头均日增重对照组(968.2±86.84)g,试验组(1 078.5±40.04)g,提高了11.4%,差异达到显著水平(P<0.05);(2)屠宰率、净肉率、胴体产肉率、肉骨比值、眼肌面积、失水率与不同等级分割肉占净肉重的比例等,两组均存在差异,但未达到显著水平(P>0.05);(3)累计增重利润试验组比对照组多243.4元。结果表明在肉牛产业化生产中,应用推广全混合日粮饲喂技术,替代传统的精粗分饲,效果更好。 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