0～56日龄舍饲肉用羔羊胃肠道发育特点研究

畜牧兽医学报 ›› 2011, Vol. 42 ›› Issue (4): 513-520.doi:

0～56日龄舍饲肉用羔羊胃肠道发育特点研究

郭江鹏¹，张元兴¹，李发弟^1，2*，郝正里¹，马友记¹，潘建忠¹

1.甘肃农业大学动物科学技术学院，兰州 730070；2.甘肃省饲料工程技术研究中心，兰州730070

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2011-04-20 发布日期:2011-04-20
通讯作者: 李发弟

Developmental Characteristics of Gastrointestinal Tract in Confined Lambsat the Age 0-56 Days

GUO Jiang-peng¹, ZHANG Yuan-xing¹, LI Fa-di^1,2*, HAO Zheng-li¹, MA You-ji¹, PAN Jian-zhong¹

1.College of Animal Science and Technology, Gansu Agricultural University,Lanzhou 730070, China；2. Gansu Feed Engineer Technology Research Center,Lanzhou 730000, China

Received:1900-01-01 Revised:1900-01-01 Online:2011-04-20 Published:2011-04-20

摘要/Abstract

摘要： 旨在研究舍饲并始于7日龄补饲条件下羔羊胃肠道的发育特点。选用甘肃肉用绵羊新品种选育群公羔（单羔）45只，分为9组，每组5只，分别于0、7、14、21、28、35、42、49和56 d屠宰、取样，测定各胃室相对质量（%活体质量、%全胃质量）、各胃室相对容积（%胃肠道容积、%全胃容积）及各肠段的相对质量（%活体质量、%肠道总质量）。结果表明，0 d全胃相对质量(%活体质量)约为1%，其56 d是0 d的2.33倍，皱胃相对质量（%活体质量）随日龄的增长而下降（56 d是0 d的79.86%）；瘤网胃相对容积（%胃肠道容积、%全胃容积）在7 d后大幅增长，其28 d值（%全胃容积）超过相对质量（%全胃质量），同期内皱胃相对容积（%胃肠道容积、%全胃容积）则大幅下降；全肠相对质量（%活体质量）亦随日龄增长而增大，56 d是0 d的1.43倍；大肠的增速略大于小肠，其56 d是0 d 的1.71倍，小肠为1.36倍。小肠中，仅回肠的增长略大，而大肠中盲肠、结肠、直肠的增速相近。结果提示，羔羊出生后各消化器官呈现不同的生长速度；胃相对质量的增速大于肠。舍饲条件下，第7天后的充足补饲能促使各胃室质量和容积的发育提前7～14 d。舍饲并早期补饲的饲养模式下，在第35或28天进行断奶具有可行性。

Abstract: The objective of this study was to investigate the developmental characteristics of gastrointestinal tract in confined raising lambs with supplementary feed from the age of 7 days. Forty-five male lambs (Gansu modern breeding sheep group) were divided into 9 treatments (5 animals in every treatment), which were slaughtered and sampled at the age of 0, 7, 14, 21, 28, 35, 42, 49, 56 days, respectively. The relative weight of compartments in stomach (%live weight, %stomach weight), relative capacity of compartments in stomach (%gastrointestinal tract capacity, %stomach capacity), and relative weight of compartments in intestine (%live weight, %intestinal weight) were measured. The results showed that the relative weight of stomach (% live weight, RWS-L) at 0 d was about 1% of the live weight. RWS-L at 56 d was 2.33 times as large as that at 0 d. At the same time, declines were observed in RWA-L of lambs, and RWA-L at 56 d was 79.86% as large as that at 0 d. RCF-G and RCF-S were notably increasing after 7 d, and it could be appeared that RCF-S was exceed than RWF-S at 28 d. RCA-G and RCA-S were significantly decline during 7 to 28 d. With the age in days increasing, there were some increasing in relative intestinal weight (%live weight), and it was 1.43 times at 56 d as large as that at 0 d. The growing speed of large intestine (% intestinal weight) were more quickly than that of small intestine, and the large intestine and small intestine were 1.71 and 1.36 times at 56 d as large as that at 0 d, respectively. There was more growing speed in ileum than other compartments in small intestine, but almost similar growing speeds were found in every compartment (cecum, colon, rectum) of large intestine. These results indicated that different growing speeds were appeared in gastrointestinal organs at the age of 056 d in lambs. The growing speeds of relative weight in stomach were more than that in intestine. And 7 to 14 days would be ahead on the development of weight and capacity in stomach for confined raising lambs and providing enough supplementary feed from 7 d after birth. With confined raising and supplying the suited supplementary diet, the feasible weaned age in days was 35 or 28 d after birth in lambs.

郭江鹏;张元兴;李发弟;郝正里;马友记;潘建忠. 0～56日龄舍饲肉用羔羊胃肠道发育特点研究[J]. 畜牧兽医学报, 2011, 42(4): 513-520.

GUO Jiang-peng;ZHANG Yuan-xing;LI Fa-di;HAO Zheng-li;MA You-ji;PAN Jian-zhong . Developmental Characteristics of Gastrointestinal Tract in Confined Lambsat the Age 0-56 Days[J]. ACTA VETERINARIA ET ZOOTECHNICA SINICA, 2011, 42(4): 513-520.

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