不同早期断奶日龄对舍饲肉用羔羊胃组织形态发育变化的影响

doi:10.11843/j.issn.0366-6964.2018.05.012

摘要/Abstract

摘要：

旨在研究早期断奶对舍饲羔羊复胃组织形态发育的影响。本研究选用甘肃肉用绵羊新品种育种群公羔（单羔）55只，分为3个处理，其中28日龄断奶组（A组）、42日龄断奶组（B组）各15只，对照组（不断奶，C组）25只，于7日龄开始补饲；A、B组分别于断奶后的第0、7、14天屠宰，每个屠宰日均同时屠宰对照组羔羊5只，采集瘤胃腹囊与背囊、网胃底、瓣胃和皱胃贲门腺区、胃底腺区、幽门腺区等用于测定相关组织形态学指标。结果表明，A组断奶7天，A组、B组断奶14天，瘤胃腹囊乳头高度显著高于C组（P<0.05）；断奶14天，A组瘤胃背囊乳头高度较断奶日的增长率明显高于B组（83.4%vs. 46.9%）；A组、B组平均网胃胃底乳头高度明显大于C组（1 194.0 μm vs. 632.2 μm；953.1 μm vs. 661.3 μm）；断奶14天，A组瓣胃角化层厚较断奶日的增长率高于B组（40.6%vs. 31.9%）；断奶14天，B组皱胃贲门腺区黏膜厚显著高于C组（P<0.05）；A组、B组皱胃胃底腺区平均黏膜下层厚明显高于C组（326.8 μm vs. 245.2 μm；303.4 μm vs. 172.7 μm）；A组、B组平均皱胃幽门腺区肌层厚明显高于C组（1 218.4 μm vs. 1 047.4 μm；1 466.3 μm vs. 1 253.7 μm）。在舍饲并于7日龄补饲条件下，早期断奶对羔羊瘤胃、网胃、瓣胃和皱胃组织形态学指标的发育主要呈现促进作用，28日龄断奶对羔羊复胃组织形态学发育的促进作用优于42日龄断奶。

Abstract:

The objective of this study was to investigate the effect of early weaned on morphological development of stomach for housed lambs. Fifty-five male lambs (Gansu modern breeding sheep group, singleton) were divided into 3 treatments, 15 animals were used in group A (weaned at 28 d of age) and B (weaned at 42 d of age), respectively, 25 suckling lambs were used in group C (control). All lambs were raised with the supplementary feed from 7 d of age. Lambs were killed and sampled from the group A and B at 0, 7, 14 days after weaned, respectively, and lambs in the control(5 lambs) were killed and sampled at the same time. The morphological indexes of rumen ventral sac and dorsal sac, fundus reticuli, omasum, and cardiac, fundus, pyloric of abomasum were measured, respectively. The results showed that, group A was weaned for 7 days, group A and B were weaned for 14 days, the papilla height of the rumen ventral sac were significantly higher than that of group C(P<0.05). The growth rate of the papilla height in rumen dorsal sac in group A was higher than that in group B(83.4% vs. 46.9%) at weaned for 14 days. The average papilla height of fundus reticuli in group A and B were higher than that in group C(1 194.0 μm vs. 632.2 μm;953.1 μm vs. 661.3 μm). The growth rate of the epithelial thickness in omasum in group A was higher than that in group B (40.6% vs. 31.9%) at weaned for 14 days. And the mucosa thickness of cardiac gland in abomasums in group B was significantly higher than that in group C at weaned for 14 days (P<0.05). The average submucosa thickness of fundus gland abomasum in group A and B were higher than that in group C(326.8 μm vs. 245.2 μm;303.4 μm vs. 172.7 μm). And the average muscular thickness of pyloric gland abomasum in group A and B were higher than that in group C(1 218.4 μm vs. 1 047.4 μm;1 466.3 μm vs. 1 253.7 μm). The result indicated that, with feasible raised and supplied the suited supplementary diet from 7 d of age, there were promotion for morphplogical development of stomach in lambs. And it had better promotion for the lambs weaned at 28 d of age than at 42 d of age for the morphplogical development of stomach.

中图分类号:

S826.4

郭江鹏, 潘建忠, 李发弟, 张元兴, 杨宇泽, 郝正里. 不同早期断奶日龄对舍饲肉用羔羊胃组织形态发育变化的影响[J]. 畜牧兽医学报, 2018, 49(5): 971-985.

GUO Jiang-peng, PAN Jian-zhong, LI Fa-di, ZHANG Yuan-xing, YANG Yu-ze, HAO Zheng-li. Effect of Different Early Weaned Day on Morphological Development of Stomach for Housed Lambs[J]. ACTA VETERINARIA ET ZOOTECHNICA SINICA, 2018, 49(5): 971-985.

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