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在饲料中添加松针、白术、苦参三种中草药,以验证其对北京白羽鹌鹑体标体尺及屠宰性能的影响。试验采用3因素3水平正交设计,通过配比试验选择最优剂量,然后进行剂量试验,在试验期结束后进行屠宰试验和肉品质测定试验。结果表明,三种中草药添加在体尺测定中,体斜长和胸宽对体重影响较大;屠宰结果表明,第1组效果较好。结果表明,三种中草药复合添加剂对北京白羽鹌鹑体标体尺及屠宰性能具有较大影响,可以考虑作为饲料添加剂在生产中应用。 相似文献
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试验旨在揭示威宁鸡体尺和屠宰性状的性别差异情况及体尺与屠宰指标间的相关性,参照中国家禽体尺和屠宰性状测定标准对65只(♀:33;♂:32)180日龄公、母威宁鸡的体尺和屠宰性状进行测定和分析。结果发现,威宁鸡体斜长在公、母鸡之间呈现显著差异,公鸡显著高于母鸡(P< 0.05);冠高和胫长公鸡极显著高于母鸡(P< 0.01),体尺和屠宰性状均呈性别差异,较国内其他地方鸡种,威宁鸡表现出了优异的体形外貌特征,体质健壮,肉用性能好,抗逆性强,其中,公鸡较母鸡表现为体形结构大,肉用性能更佳;另外,威宁鸡各体尺性状、多数屠宰性状及多数体尺与屠宰性状间均呈正相关关系,且多数指标间达到了显著或极显著水平(P< 0.05;P< 0.01),这对今后威宁鸡的选育尤其是早期选育具有重要参考意义。 相似文献
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为分析北京鸭体尺与屠宰性能指标的相关性,本试验通过对3～6周龄的北京鸭随机选取并测定体尺指标与屠宰性能指标,对它们的相关性进行分析及建立回归方程。 相似文献
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为本试验选取了300日龄浦东鸡公母各30羽,测定了体尺与屠宰性能,进行了相关性分析,结果表明:浦东鸡公鸡和母鸡相比较,体尺指标和屠宰性能除屠宰率和半净膛率差异显著( P <0.05)外,其他指标差异均极显著( P <0.01),体尺指标之间相关性公鸡和母鸡有较大差异,屠宰性能之间的相关性公鸡和母鸡基本一致,体尺与屠宰性能之间的相关性公鸡和母鸡差异明显。因此,按不同性别研究体尺和屠宰性能更加合理,准确性更高,更有利于浦东鸡的精确选育和保种。 相似文献
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为研究巴尔楚克羊生长发育和肉用性能,笔者主要对喀什地区饲养的巴尔楚克羊1～2岁龄母羊进行体重、体尺测定。另对巴尔楚克羊1～2岁龄公羊进行屠宰测定并进行数据分析。结果表明,1～2岁龄母羊平均体重,体高,体长,胸围分别为50.35kg、68.65cm、83.00cm、92.68cm。屠宰率、净肉率、眼肌面积分别为51.61%、42.9%、14.34cm2。将本次测定结果与我区优良地方品种多浪羊进行比较,结果显示,巴尔楚克羊的体尺与屠宰测定数据与多浪羊的体尺与屠宰测定数据差异不显著(P>0.05)。 相似文献
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为了评价半番鸭生长发育规律及不同性别间的体尺、屠宰测定性状,选择大型白羽半番鸭作为研究对象,采用常规方法饲养至12周龄,测定了各周龄的体重、日增重和12周龄雌雄半番鸭的体尺性状、屠宰性能。结果表明,半番鸭第8周龄时日增重最大,体重在12周龄时基本趋于稳定。体尺指标方面,雄性半番鸭半潜水长和胫长显著高于雌性(P0.05);屠宰性能方面,雄性半番鸭体重、屠体重、半净膛重、全净膛重显著高于雌性(P0.05)。揭示了大型白羽半番鸭的生长性能、体尺性状、屠宰性状等生产指标,为大型白羽半番鸭的精深加工提供了科学依据。 相似文献
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闽南牛遗传多样性及其系统地位的研究 总被引：1，自引：0，他引：1
以中心产区简单随机抽样法在福建省漳州市漳浦县霞关乡抽取闽南牛64头,采集血样,按常规方法分离血浆和血细胞,冷冻后带回实验室-20℃保存备用。用垂直平板聚丙烯酰胺凝胶电泳(PAGE)和水平淀粉凝胶电泳技术检测21个编码血液蛋白(酶)的结构基因座的基因频率,同时引用国内外13个群体7个相同座位的研究资料,进行聚类分析,结果表明:在所检测的21个基因座中,有10个存在多型,多态位点百分比为47．62％,群体内遗传变异水平相对较高,平均杂合度为0．1593;闽南牛与东南亚牛种亲缘关系较近,证实了闽南牛是由南方黄牛和瘤牛的混血种,但可能不含有斑腾牛或巴厘牛的血统。目前应扩大保种群的数量,以维持群体内遗传传多样性。 相似文献
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奶牛生产方式是影响奶牛奶产量和质量的重要因素。本文通过对兰州市晏家坪奶牛养殖小区、甘肃农业大学实验奶牛场、兰州市个体养殖户三种不同类型奶牛场的牛奶乳脂率及酸度指标分析,表明不同生产方式下牛奶质量差别较大,以相对规模化、集约化生产的奶牛养殖小区牛奶质量最好,个体养殖户牛奶质量较差。因此,在奶牛生产中,采用规模化、集约化的生产模式是保证牛奶质量的重要措施之一。 相似文献
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S S Sutherland 《Veterinary microbiology》1983,8(4):405-409
Fifty-four cattle were sensitised to Brucella antigens either by vaccination with Brucella abortus strain 19 (S19) or B. abortus 45/20 (S45/20) and 24 of these were challenged 12 weeks after mating with virulent B. abortus strain 544 (S544). A further 12 cattle which were not vaccinated were exposed to S544. After 40 weeks, all these cattle (66), together with 5 cattle which were not sensitised by vaccination or challenge were subsequently inoculated with one dose of S45/20 and the anamnestic response was measured by the complement fixation test. Ten to 15 weeks later the cattle were slaughtered and tissues cultured. Of the 52 (2 died) vaccinated cattle, 35 gave a positive anamnestic response and 20 of these were not challenged. Of the 17 unvaccinated cattle, one gave a positive response and this animal had been exposed to S544 prior to the inoculation with S45/20. The results indicated that the method had a level of sensitivity of 75% and specificity of 100% in serologically negative cattle that had been exposed previously to Brucella antigens. An evaluation of the method for detecting serologically negative, but infected cattle was not possible as the number of cattle suitable for examination in this study was too low. 相似文献
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南德温肉牛杂交改良本地黄牛效果 总被引：1，自引：0，他引：1
利用南德温肉牛对乐都县地区本地黄牛进行了杂交改良,结果表明,南德温肉牛改良牛的体形外貌多数牛犊为红色,占统计数的83.33%,棕红色占16.67%.6月龄增重以南×黄速度最快,比皮×黄和本地黄牛分别多增重77.89和96.03,差异极显著(P＜0.01);胸围比皮×黄和本地黄牛分别大于26.47和47.54,差异极显著(P＜0.01).因此,南黄F1体重、体尺生产性能等方面都比本地黄牛得到了明显改善和提高. 相似文献
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The occurrence, prevalence and transmission of Bacteroides nodosus infection in cattle 总被引：1，自引：0，他引：1
Following reports of findings of ovine foot-rot flora in the feet of cattle, a study was undertaken to determine the prevalence of Bacteroides nodosus infection in the apparently normal cattle population. We found that 34.5 to 74.2 per cent of the animals examined on different farms had B nodosus present in one or more feet. B nodosus was not the most prevalent bacterium observed in smears from cattle. Other Gram negative species including Fusiformis necrophorus and many Gram positive cocci and coccobacilli were also present. Macroscopic lesions in the interdigital skin characterised by erosion and hyperkeratosis were usually associated with the occurrence of B nodosus. B nodosus isolated from cattle induced mild interdigital dermatitis in experimental cattle and sheep and the infection was transmitted to recipient cattle and sheep under field conditions. Virulent foot-rot of sheep was not transmitted to recipient cattle in conditions where the disease spread to susceptible sheep. 相似文献
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Five trials were conducted to evaluate the effects of the presence of horns on cattle on carcase bruising. In each trial there were three groups of cattle, hornless, horned and mixed (some with hrons and some without). The weight of bruised tissue trimmed from the carcases of the cattle in the horned groups was significantly greater than that trimmed from the carcases of the cattle in the hornless groups. When horned and hornless cattle are mixed the hornless animals in the mixed group sustain significantly more bruising than animals in a group consisting soley of hornless animals while the horned animals in a mixed group have a similar degree of bruising to cattle in a group consisting solely of horned cattle. 相似文献
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Mel Pence Charles Baldwin C Carter Black 《Journal of veterinary diagnostic investigation》2003,15(5):475-477
Beef and dairy cattle serum samples, collected during 2000 at sale barns throughout Georgia, were obtained from the Georgia State Brucellosis Laboratory and were used to conduct a retrospective epidemiological study. Statistical samplings of 5,307 sera, from over 200,000 sera, were tested for antibodies to Mycobacterium avium ssp. paratuberculosis, (Johne's disease) using a commercial enzyme-linked immunosorbent assay test kit. An overall period seroprevalence in all classes of cattle tested was 4.73%. The period seroprevalence in dairy cattle was 9.58%, in beef cattle it was 3.95%, and in cattle of unknown breed it was 4.72%. It was concluded that the seroprevalence of Johne's disease in cull beef and dairy cattle in Georgia is economically significant. 相似文献
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为评价牛γ-干扰素ELISA检测方法检测牛结核的效果及国产试剂盒的检测效果,本试验首先将国产试剂盒与Prionics试剂盒对42份相对阳性的样品和105份相对阴性的样品进行对比研究。然后对5个规模化牛场的3000头奶牛首先进行国产单纯结核菌素颈部皮内变态反应试验,3天后选取皮内变态反应阳性和可疑及部分阴性牛共418头,进行牛γ-干扰素试验。结果国产试剂盒对阳性和阴性样品的检测敏感性和特异性分别为95.2%和100%,与Priobics试剂盒的符合率为99.3%。表明国产试剂盒与进口试剂盒的检测能力一致,牛γ-干扰素检测方法准确可靠。5个牛场的3000头奶牛单纯结核菌素颈部皮内变态反应试验阳性为138头,可疑105头。γ-干扰素试验对418头奶牛的检测,其中阳性74头,与颈部皮内变态反应（可疑牛暂时视为阴性）的符合率为60.5%。 相似文献