【作者】 吴美玲；

【导师】 乔灵；

【作者基本信息】 内蒙古农业大学 ， 基础兽医学， 2005， 硕士

【摘要】 本试验通过大体解剖、组织学及扫描电镜等方法研究了 10 只 1.5 岁阿尔巴斯绒山羊在放牧饲养与圈养不同饲养条件下瓣胃与皱胃黏膜的形态变化。 研究结果表明: 瓣胃容积:放牧组﹥干草组﹥青草组,放牧组与干草组、青草组相比差异极显著(p<0.01),干草组与青草组相比差异显著(p<0.05),与第一批试验的结果[1]一致。大、中、小瓣叶高度:以放牧组的最高,青草组与干草组之间与第一批结果相反。瓣叶的形状:在不同个体不完全一致,大瓣叶上可见有次级黏膜褶形成。胃壁肌层厚度:干草组﹥青草组﹥放牧组,三组之间差异不显著;角化层的厚度(光镜与电镜下):放牧组﹥青草组﹥干草组,放牧组与干草组、青草组之间差异极显著(p<0.01);中央肌层的厚度: 放牧组﹥干草组﹥青草组, 放牧组与青草组之间差异显著( p<0.05)。两批的试验结果基本趋于一致。高倍镜下,放牧组的黏膜上皮表层角化程度最高,中间层细胞呈轻度角化,细胞及胞核形态不规则;干草组的角化程度最差,中间层细胞与青草组的相似,细胞核较规则,呈圆形或椭圆形。电镜下,瓣叶角质乳头密度以放牧组密度最大,干草组的最小,青草组介于其间。瓣胃帆的黏膜是前胃黏膜与皱胃黏膜的过度,瓣胃帆腺体细胞特点与贲门部的相似。 皱胃容积 :干草组﹥青草组﹥放牧组,三组羊之间差异均显著( p<0.05)。胃底腺部、贲门腺部与幽门腺部腺体高度均为:放牧组﹥青草组﹥干草组;黏膜肌层的厚度:放牧组﹥干草组﹥青草组(除胃底部是干草组﹥青草组﹥放牧组外)。各组各项之间差异均不显著。同组皱胃各部黏膜的结构:幽门腺部的腺区分布最大,黏膜肌层最发达。高倍镜下,三个腺区颈部细胞均为柱状上皮细胞,核呈椭圆形,其中青草组的细胞胞质红染。胃底腺体部细胞以主细胞最多,其次是壁细胞,颈黏液细胞很少见;青草组的壁细胞数量较少,且胞质红染;干草组管状腺腺体的密度较大。贲门腺区的腺细胞主要为分泌黏液的立方形上皮细胞,细胞核位于基部,呈圆形或卵圆形,偶见壁细胞。幽门腺体部与底部,主要是黏液细胞,无主细胞与壁细胞。更多还原

【Abstract】 Histological changes of 10 eighteen-month-old Aerbasi cashmere’s omasal and abomasal mucosa have been studied with the basical anatomical way,histology-sliced way and sanning way on different raising conditions that they are grazed and yard-raising . The results: omasal volume is biggest on grazed goats(i.e.G1), second on hay-raised goats(i.e.H)and smallest on green-grass-raised goats(i.e.G2). G1 contrast prominently with H and G2 (p<0.01),the between H and G2 is prominent(p<0.05),it is coherent with the first study[1]. Omasal folds is highest in G1,the between H and G2 is opposite to the first study[1]. The characteristic of folds are different following the individual difference. The thicknesses of muscle layers ,horny layers ,and central muscularis are different among G1,H and G2,their difference is arising,too. The epithelium variety is obvious among three groups goat. Omasal lip is overage between omasu and obomasum,and its cell shape is similituded fundic gland’s. Obomasal volume is biggest in H, second in G2 and smallest in G1 ,the different is prominent(p<0.05) among three groups goat.It is variational that height of gland region and thicknesses of mucosal muscle layers among three groups goat. The characteristic of cells are distinct in fundic gland region,cardiac gland region and pyloric gland region.更多还原