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

doi:10.16431/j.cnki.1671-7236.2017.05.012

Abstract

Abstract:

This study was aimed to investigate the changing rule of gastrointestinal full weight,relative net weight,volume and length of the lamb at 0 to 56 days of age.24 Shaanbei White cashmere goat were divided into eight groups (3 goats per group),which were slaughtered for collecting sampling at 0,3,7,14,21,28,42 and 56 days of age, respectively.The growth development in different stages and the gastrointestinal tract parameters such as total weight,relative net weight,volume and length were determined. The results showed that the relative net weight of stomach room increased rapidly apart from abomasum. The growth rate was relatively higher after 7 days of age.The ratio of rumen, reticulum and omasum net weight to full stomach net weight increased from 29.34% to 52.53%,11.83% to 14.77% and 6.54% to 9.34%,while that of abomasum decreased from 52.29% to 23.36%. The net weight of each parts of the small intestine was growing,and the percentage of duodenum net weight to whole small intestine weight remained about 3.5% during the whole experiment,that of jejunum was about 90%,while that of ileum remained around 1% before 14 days of age and 5% after 14 days of age.The total weight of each part of the large intestine increased rapidly. Specially,the total weight of caecum, colon and rectum increased from 5.29 g to 43.31 g,11.67 g to 200.45 g and 3.03 g to 53.02 g.There was a slow growth in the early period,then the total weight of each part of the large intestine increased rapidly from 28 days of age. In conclusion,it was a critical point of goat all-round development in 28 days of age, and the digestive tract parameters would rapidly grow after 28 days of age, especially the organs like rumen,ileum,caecum and colon which could effectively digest the fiber. Thus,we suggested that 28 days old was practicable for weaning combining various factors.

Key words: Shaanbei White cashmere goat; gastrointestinal tract parameters; net weight; volume

CLC Number:

S827

ZHANG Ke, LI Bi-bo, TONG Tao, CHEN Yu-lin. Anatomical Features and Changing Rule of Gastrointestinal Parameter in Shaanbei White Cashmere Goat at 0 to 56 days of Age[J]. , 2017, 44(5): 1338-1345.

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Anatomical Features and Changing Rule of Gastrointestinal Parameter in Shaanbei White Cashmere Goat at 0 to 56 days of Age

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