牛、羊卵母细胞孤雌激活的研究

本试验主要比较了离子霉素、电脉冲两种方法激活牛、羊体外成熟卵母细胞的效率。两种激活方法中。牛胚胎卵裂率无显著差异（90．61％对94．40％，P〉0．05），而离子霉素激活胚胎的囊胚发育率极显著高于电激活方法（12．3％对2．4％，P〈0．01）。两种方法对羊胚胎的研究中，羊胚胎卵裂率无显著差异（72．4％对77．4％，P〉0．05）。但是离子霉素激活胚胎的囊胚发育率显著高于电激活方法（3．67％对10．40％，P〈0．05）。本试验中还比较了用化学激活法（离子霉素）激活牛体外成熟卵母细胞后，用SOFaa体系培养，换液与不换液对孤雌激活胚胎体外发育的影响。结果表明：在第4天不换液的胚胎卵裂率和囊胚率极显著高于换液的胚胎（11．64％对3．49％。P〈0．01）。     

羊胚胎移植质量控制

本文从实验记录、供体与受体、精液、试剂、设备和耗材、胚胎质量、操作者素质等方面分析讨论了羊胚胎移植中的质量控制.     

杜泊羊血液蛋白质多态性分析

采用垂直板高pH值不连续聚丙烯酰胺凝胶电泳对21只杜泊羊的血红蛋白(Hb)、转铁蛋白(Tf)、白蛋白(Alb)、前白蛋白(Pa)和慢α2球蛋白(Sα2)5个基因座的多态性进行了分析。结果表明杜泊羊的Hb、Tf位点存在多态性,Hb位点共检测到HbA和HbB2个等位基因,构成HbAA、HbBB、HbAB3种基因型,其中HbBB和HbB为优势基因型和优势基因;Tf位点共检测到TfDD、TfCC、TfBD、TfCD4种基因型,受TfB、TfC、TfD3个复等位基因控制,其中TfCC、TfDD基因型和TfC、TfD基因为优势基因型和优势基因。试验未在Alb、Pa和Sα2位点检测出多态性,它们均呈现单态。     

棉籽壳对卡拉库尔羊血液生化指标的影响

中国卡拉库尔羊(以下简称卡羊)是以苏联卡拉库尔羊为父本,以中国库车羊为母本,进行级进杂交培育而成的羔皮羊新品种,适应性稳定,耐干旱、炎热,繁殖成活率高,耐粗饲,羔皮品质优良,非常适合新疆南部荒漠、半荒漠草原与农区饲养,是南疆地区不可替代的绵羊当家品种,目前数量有13万余只.     

羊胚胎移植手术速眠新麻醉意外的处理

速眠新注射液(又称846合剂)是一种由保定宁、氟哌啶醇和盐酸双氢埃托啡合成的复方麻醉注射液,具有高效、低毒、安全性好、实用性强等特点,已广泛应用于兽医临床上,对多种动物进行手术麻醉或药物保定。经过在羊胚胎移植手术中的应用,取得了满意效果,但也有发生一些麻醉意外的情况。现介绍如下,供同行参考。     

陶赛特羊改良山西本地绵羊产肉性能研究

用陶赛特公羊改良山西本地绵羊,杂种羊与本地羊在同样饲养管理条件下,陶×本一代8月龄羔羊的宰前活重较同龄本地绵羊高13.68 kg,胴体重高7.04 kg,净肉重高6.15 kg,差异均极显著(P＜0.01).陶×本一代胴体重达到国外上等羔羊肉胴体重标准,羊肉干物质、蛋白质和熟肉率分别比本地绵羊高5.81、1.53和1.65百分点.每只杂种羊仅产肉一项比本地羊多收入100元,经济效益明显.说明利用陶赛特公羊改良山西本地绵羊,对提高产肉性能、改善羊肉品质和增加养羊经济效益具有明显的效果.     

内蒙古：河套着力打造千万只肉羊生产基地

近年来，内蒙古自治区巴彦淖尔市依托农作物秸秆资源大力发展肉羊产业，通过散户繁育，大户育肥，启动了千万只优质肉羊生产基地建设工程，通过龙头企业带基地的运作模式，肉羊养殖产业化进程不断深入发展。     

碘酊治疗羊口疮

羊口疮是羊传染性脓疱病的俗称,是绵羊、山羊的一种由病毒所致的传染病,在羔羊多为群发。其特征为口唇等处皮肤和黏膜形成丘疹、脓疮、溃疡和结成疣状厚痂。1病原及流行传染性脓疱病是传染性脓疱病毒及羊口疮病毒所致,主要以3~6日龄羔羊发病较多,并且在秋季比较多发。2症状主要发病在唇、蹄、外阴,其中唇是常见的,病羊首先在口角或上唇,有时在鼻镜上发生散在的小红斑点,很快即形成麻子大的结节,继而成为水疱或脓疱,脓疱破溃后,成为黄色或棕色的疣状硬痂,严重病例患部继续发生丘疹、水疱、脓疱、痂垢,并相互融合,波及整个口唇周围及颜面、眼…     

The Effect of Gender on Slaughtering Performance and Meat Quality in Sunite Sheep

The purpose of this experiment was to study the effect of gender on the slaughter performance and meat quality of Sunite sheep.Twelve 6-month-old Sunite rams and ewes at the same body condition were selected from the grazing herds of the Sunite Zuoqi Improvement Station Breeding Farm to determine their slaughter performance and meat quality.The slaughter test results showed that the bone quality and bone-meat ratio of the rams were significantly higher than that of the ewes (P<0.05),and the net meat quality and net meat rate of the ewes were significantly higher than that of the rams (P<0.05).The results of meat quality traits showed that the drip loss of ewes were significantly lower than that of rams (P<0.05),and the other indicators were not significantly different (P>0.05).The results of conventional nutrient composition of muscles showed that the intramuscular moisture content of the rams were significantly higher than that of the ewes (P<0.05),and the intramuscular fat content of the ewes were significantly higher than that of the rams (P<0.05),while the other indicators were not significantly different (P>0.05).The results of amino acid determination showed that the essential amino acid ratio in muscle of sunite ewes were significantly higher than that of rams (P<0.05),but there was no significant difference between the rams and ewes that formed the precursor amino acid content of meat flavor (P>0.05).Fatty acid measurement results showed that the saturated fatty acid ratio in the subcutaneous fat of rams was significantly lower than that of ewes (P<0.05).There was no significant difference in the ratio of saturated fatty acids in muscle fat and tail fat (P>0.05);The ratio of monounsaturated fatty acids in ewes tail fat was significantly higher than that of rams (P<0.05).The ratio of monounsaturated fatty acids in subcutaneous fat and intermuscular fat was not significantly different between rams and ewes (P>0.05).The ratio of polyunsaturated fatty acids in intermuscular fat of rams was significantly higher than that of ewes (P<0.05),and there was no significant difference in the content of polyunsaturated fatty acids in subcutaneous fat and tail fat (P>0.05).In summary,it showed that gender had a certain influence on the slaughter performance and meat quality of 6-month-old Sunite sheep.     

青海省湟源、互助县羊泰勒焦虫病流行病学调查

山羊泰勒焦虫病是一种传播病．但不同于传染病．不能接触感染．必须通过适当的蜱作为传播媒介才能将病原感染动物．由于地域自然环境的不同．蜱的种类和分布是有地区性的．蜱的发育史随季节性而活动．因而焦虫病的发生和流行规律具有明显的地区性和季节性。[第一段]