早期断奶对舍饲肉用羔羊消化器官发育的影响

doi:10.11843/j.issn.0366-6964.2013.07.013

畜牧兽医学报 ›› 2013, Vol. 44 ›› Issue (7): 1078-1089.doi: 10.11843/j.issn.0366-6964.2013.07.013

早期断奶对舍饲肉用羔羊消化器官发育的影响

郭江鹏^1，2，郝正里²，李发弟^2，3*，马友记²，潘建忠^2,4,张元兴^2,5

（1.北京市畜牧兽医总站，北京 100107； 2.甘肃农业大学动物科学技术学院，兰州 730070； 3. 甘肃省饲料工程技术研究中心，兰州730070； 4. 兰州市食品药品检验所，兰州 730000；5.兰州正大有限公司，兰州 730000）

收稿日期:2012-08-06 出版日期:2013-07-23 发布日期:2013-07-29
通讯作者: 李发弟，教授，博士生导师，E-mail：lifd@gsau.edu.cn
作者简介:郭江鹏(1972-)，男，陕西耀县人，博士，主要从事反刍动物营养研究，E-mail：guojp72@163.com
基金资助:
现代农业产业技术体系建设专项资金；国家自然科学基金（31260564）

Effect of Early Weaning on Development of Digestive Organs of Barn Feeding Lambs

GUO Jiang-peng^1,2, HAO Zheng-li², LI Fa-di^2,3*, MA You-ji², PAN Jian-zhong^2,4,ZHANG Yuan-xing^2,5

(1. Beijing General Station of Animal Husbandry & Veterinary Service，Beijing 100107, China;2. College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070,China; 3. Gansu Feed Engineer Technology Research Center, Lanzhou 730070, China; 4. Lanzhou Institute for Food and Drug Control, Lanzhou 730000, China; 5. Lanzhou ChaiTai Co., LTD., Lanzhou 730000, China)

Received:2012-08-06 Online:2013-07-23 Published:2013-07-29

摘要/Abstract

摘要：

为研究早期断奶对舍饲肉用羔羊消化器官发育的影响，选用甘肃肉用绵羊新品种选育群公羔（单羔）55只，分为3个处理，其中28 d断奶组（A组）和42 d断奶组（B组）各15只，对照组（不断奶，C组）25只，于第7天开始补饲；2个断奶组均于断奶后第0、7和14天（对照组于对应时间）屠宰、取样；分别测定了肝脏和胰腺、各胃室及各肠段相对重量，各胃室相对容积等指标。结果表明，羔羊肝脏和胰腺相对重量（%活体重）均随日龄而增大，B组增幅大于A组。断奶后7 d与断奶日相比，A、B组羔羊瘤网胃相对重量（%活体重、%全胃重）分别增加了107.28%、16.22%和40.39%、13.24%，C组对应时段分别增加了29.04%、17.48%和27.10%、4.26%；28 d断奶羔羊皱胃相对重量（%活体重）仍有小幅增长（断奶后7与14 d较断奶日分别增加了25.39%与7.42%），而42 d断奶羔羊却明显降低（相应为断奶日的78.16%和65.37%）。断奶对全胃及各胃室相对容积（%胃肠道容积）有明显促进作用，且较早断奶的作用更大。断奶日龄对羔羊各肠段相对重量（%活体重、%肠道重）影响不明显（P>0.05）。结果提示，断奶组羔羊在断奶后7 d的前胃及瘤网胃相对重量（%全胃重）均接近成年绵羊水平。舍饲条件下从7 日龄开始补饲，在35甚或28日龄时羔羊瘤网胃相对重量和相对容积得到了较充分的发育，35或28 d实施早期断奶可行。

关键词: 早期断奶, 舍饲羔羊, 消化器官, 发育

Abstract:

The objective of this study was to investigate the effects of early weaning on the development of digestive organs of barn feeding lambs. Fifty-five male lambs (Gansu modern breeding sheep group, single lamb) were randomly assigned to 3 treatments with 15 (experimental group) or 25 (control group) each. 25 animals were not weaned during the experiment (control), 15 animals each were weaned at 28(A) or 42 d(B) of age. Supplementary feed were offered at 7 d of age for all the animals. 5 animals from treatments A or B were slaughtered at 0, 7 and 14 d after weaning accompanied by 5 animals from the control. The relative weight of liver and pancreas, compartments of stomach and intestines, and relative volume of compartments of stomach were determined, respectively. The results indicated that the relative weight of liver and pancreas (% live weight) were increased with age, and the range of increase in group B was greater than that in group A. Compared with the weaned day, the relative weight of reticulorumen (% live weight, % stomach weight) 7 days after weaning were increased by 107.28%, 16.22% and 40.39%, 13.24% in group A and B, respectively, 29.04%, 17.48% and 27.10%, 4.26% in control at the corresponding time, respectively. Compared with the weaned days, relative weight of abomasums (% live weight) in group A were increased 25.39% and 7.42% after weaned 7 and 14 d, respectively, but the animals in group B were significantly declined 78.16% and 65.37% at the corresponding day, respectively. The effect of weaning on the relative volume (% gastrointestinal tract capacity) in stomach and every compartments of stomach were significant, and more acceleration appeared in more early weaned animals. There weren’t significant influence on relative weight (% live weight, % intestinal weight) in every compartment of intestine with different weaned days (P>0.05). The results indicated that, 7 days after weaning, the relative weight of forestomach and reticulorumen (% stomach weight) in weaned groups were close to the adult sheep. Under feeding conditions, the supplementary feed were offered at 7 d after birth, the relative weight and volume of reticulorumen fully developed at the 35 or 28 d of age for barn feeding lambs. The early weaning can be implemented at 28 or 35 d of age.

Key words: early weaning, barn feeding lamb, digestive organs, development

中图分类号:

S826
S815.4

郭江鹏，郝正里，李发弟，马友记，潘建忠,张元兴. 早期断奶对舍饲肉用羔羊消化器官发育的影响[J]. 畜牧兽医学报, 2013, 44(7): 1078-1089.

GUO Jiang-peng, HAO Zheng-li, LI Fa-di, MA You-ji, PAN Jian-zhong,ZHANG Yuan-xing. Effect of Early Weaning on Development of Digestive Organs of Barn Feeding Lambs[J]. ACTA VETERINARIA ET ZOOTECHNICA SINICA, 2013, 44(7): 1078-1089.

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早期断奶对舍饲肉用羔羊消化器官发育的影响

Effect of Early Weaning on Development of Digestive Organs of Barn Feeding Lambs

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