0～56日龄陕北白绒山羊解剖特点及胃肠道参数变化规律探究

发布时间：2018-12-10 22:34

【摘要】：试验旨在研究0~56日龄羔羊胃肠道全重、相对净重、容积、长度等参数的变化规律。试验选用24只陕北白绒山羊,按照完全随机试验设计分为8组,每组3只,分别在0、3、7、14、21、28、42、56日龄屠宰、取样,测定各阶段羔羊体况发育情况及胃肠道全重、相对净重、容积及长度等参数。结果显示,除了皱胃外,各胃室相对净重均快速增长,7日龄后增速较高,在56日龄时,瘤胃相对净重从0日龄的29.34%提升到52.53%,网胃从11.83%到14.77%,瓣胃从6.54%上升到9.34%,而皱胃相对净重从52.29%下降到23.36%;小肠各部位净重均保持增长,十二指肠相对净重在0~56日龄整个阶段均保持在3.5%左右,而空肠均保持在90%左右,回肠相对净重在14日龄之前保持在1%左右,在14日龄之后保持在5%左右;大肠的各部位全重迅速增大,盲肠从0日龄的5.29g增长到56日龄的43.31g,结肠从11.67g增长到200.45g,直肠从3.03g增长到53.02g,前期增长缓慢,从28日龄开始,大肠各部位全重迅速增重。综上所述,28日龄是羔羊全面发育的一个界点,28日龄后,其消化道参数快速增长,特别是具有纤维物质消化能力的瘤胃、回肠、盲肠、结肠等部位,结合各方面因素可以预测,28日龄断奶具有可行性。
[Abstract]:The aim of the experiment was to study the changes of total gastrointestinal weight, relative net weight, volume, length and other parameters of 0 ~ 56 days old lambs. Twenty-four northern Shaanxi white cashmere goats were selected and divided into 8 groups according to the complete random trial design. Each group had 3 goats slaughtered at the age of 0 ~ 3 ~ 3 ~ 7 ~ 14 ~ 14 ~ 21 ~ 28 ~ (28) ~ 42 ~ 56 days old. The development of the lambs in different stages and the total gastrointestinal weight and the relative net weight of the lambs were measured. Parameters such as volume and length. The results showed that the relative net weight of gastric chambers increased rapidly except for abomasum. The relative net weight of rumen increased from 29.34% at day 0 to 52.53g at 56 days of age, and the net weight of stomach increased from 11.83% to 14.77. The relative net weight of abomasum decreased from 52.29% to 23.36. The relative net weight of duodenum and jejunum were about 3.5% and 90% respectively, and the relative net weight of ileum was about 1% before 14 days of age, and the relative net weight of duodenum was about 3.5% in the whole stage of 0 ~ 56 days old, while that of jejunum was about 90%, and the relative net weight of ileum was about 1% before 14 days of age. After 14 days of age, it remained about 5%; The total weight of all parts of large intestine increased rapidly from 5.29 g to 43.31 g at 0 day old, from 11.67 g to 200.45 g in colon and from 3.03 g to 53.02 g in rectum. All parts of large intestine gain weight rapidly. After 28 days of age, the digestive tract parameters increased rapidly, especially in the rumen, ileum, cecum, colon and other parts with fibrous digestibility. Combined with various factors can be predicted, 28-day weaning is feasible.
【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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