0～56日龄陕北白绒山羊胃肠道组织形态发育探究

发布时间：2018-05-14 19:40

本文选题：陕北白绒山羊 + 解剖　；参考：《中国畜牧杂志》2017年07期

【摘要】：本试验旨在研究0~56日龄羔羊胃肠道组织形态随日龄的发育变化规律。试验选用24只陕北白绒山羊羔羊,按照完全随机试验设计分为8组,每组3只。分别在出生后0、3、7、14、21、28、42、56日龄屠宰、取样,制作常规石蜡切片,HE染色,测定各组织相关指标及胃室发酵指标。结果表明:在0~56日龄的发育过程中,陕北白绒山羊瘤胃内容物的pH维持在5.35~6.28,皱胃液pH在3.29~4.39;瘤胃背囊乳头高度从28日龄开始,增速加快;网胃各指标呈现增大趋势;十二指肠绒毛高度在0、3、7、14、28、56各日龄间差异显著(P0.05),回肠隐窝深度在0、3、14、42、56各日龄之间差异显著(P0.05),空肠绒毛高度在0、14、56各日龄之间差异显著(P0.05);结肠的黏膜厚度和肌层厚在0~56日龄过程中发育显著。综上可知,28日龄是陕北白绒山羊胃肠道组织形态发育的临界点。在28日龄后,山羊各项指标发育迅猛加速,几乎接近56日龄水平,故预测陕北白绒山羊利用代乳料可实现28 d断奶。
[Abstract]:The aim of this study was to study the changes of gastrointestinal tissue morphology with age of 0 ~ 56 days old lambs. Twenty-four Shebei white cashmere goats were randomly divided into 8 groups with 3 lambs in each group. The specimens were slaughtered at the age of 56 days after birth. The specimens were made into paraffin sections and stained with HE, and the related indexes of tissues and gastric fermentation were measured. The results showed that the pH of rumen contents was maintained at 5.35 ~ 6.28, the pH of rumen fluid was 3.29 ~ 4.39, the height of rumen rucksack nipple was accelerated from 28 days old, and the index of reticulum showed an increasing trend during the development of 0 ~ 56 days of age, the pH of rumen contents was 5.35 ~ 6.28 and the pH of rumen fluid was 3.29 ~ 4.39. There were significant differences in the height of duodenal villus between 0 ~ 3 ~ 3 ~ 7 ~ 14 ~ 14 ~ 28 ~ 56 days of age (P 0.05), ileum recess depth in 0 ~ 3 ~ 14 ~ (42) ~ 56 days, jejunum villi height in 0 ~ 14 ~ 56 days (P = 0.05), mucosal thickness and myometrium thickness in the colon at 0 ~ 56 ~ (th) day old (P = 0.05), and the thickness of mucous membrane and muscle layer of colon at 0 ~ 56 days old. During the process, the development is remarkable. It is concluded that 28 days old is the critical point of gastrointestinal tissue development in Northern Shaanxi White Cashmere Goat. After 28 days of age, the development of goat indexes accelerated rapidly, almost to the level of 56 days old, so it was predicted that the white cashmere goat in Northern Shaanxi could be weaned for 28 days by substitute milk.
【作者单位】：西北农林科技大学动物科技学院;
【基金】：国家绒毛用羊产业技术体系(CARS-40-13) 公益性行业(农业)科研专项(201303059)
【分类号】：S827

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