不同日龄下内蒙古绒山羊胃肠道组织形态学发育的研究

Study on histomorphological development of gastrointestinal tract of cashmere goats in Inner Mongolia at different ages

试验利用组织学方法比较10日龄和30日龄内蒙古绒山羊胃肠道组织形态的变化。试验分别随机选取10日龄和30日龄内蒙古绒山羊各3只,共6只,进行屠宰,取样,按常规方法制作石蜡切片以及H.E.染色,测定各阶段羔羊反刍胃、小肠及大肠相关参数。结果显示,与10日龄相比,30日龄羔羊瘤胃全重、净重、瘤胃背囊乳头宽度、固有层宽度、肌层厚度和角化层厚度均显著增加(P<0.05),网胃底初级皱襞高度显著增加(P<0.05),网胃底肌层厚度显著增加(P<0.05),瓣胃底中央肌层厚度、肌层厚度和角化层厚度显著增加(P<0.05),十二指肠和空肠隐窝深度均显著降低(P<0.05),绒毛高度/隐窝深度值均显著增加(P<0.05),盲肠肌层厚度和直肠黏膜层厚度显著增加(P<0.05)。研究表明,随日龄的增加(10日龄至30日龄),内蒙古绒山羊羔羊消化道吸收营养能力逐渐增强,且发育健康。

Histological methods were used to compare the changes in the morphology of the gastrointestinal tract of 10-day-old and 30-day-old cashmere goats in Inner Mongolia.In this study,three 10-day-old and three 30-day-old Inner Mongolia cashmere goats,a total of six goats,were randomly selected for slaughter and sampling.Paraffin sections and H.E.staining were made according to conventional methods,and the relevant parameters of ruminant stomach,small intestine and large intestine of lambs at each stage were determined.The results showed that compared with the 10-day-old lamb,the total rumen weight,net weight,rumen ruffle nipple width,lamina propria width,muscular thickness and keratosis thickness of the 30-day-old lamb increased significantly(P<0.05),the height of the primary fold of the reticulogastric fundus increased significantly(P<0.05),the thickness of the reticulogastric fundus myometrium increased significantly(P<0.05),the thickness of the central muscle,the thickness of the muscle,and the thickness of the keratinized layer of the valvular fundus increased significantly(P<0.05),the depth of the recesses of the duodenum and jejunum crypts decreased significantly(P<0.05),the villus height/crypt depth values increased significantly(P<0.05),and the thickness of the cecal muscle,and the thickness of the rectal mucosa increased significantly(P<0.05).The results showed that with the increase of age(10 to 30 days old),the digestive tract of Inner Mongolia cashmere goats gradually increased their ability to absorb nutrients,and their development was healthy.