动物营养学报 >

2018 , Vol. 30 >Issue 12: 5230 - 5237

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.12.052

研究简报 Short communications

饲粮粗纤维水平与采食时间对生长猪肠道食糜通过速度的影响

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  • 中国农业科学院北京畜牧兽医研究所, 动物营养学国家重点实验室, 北京 100193
高庆涛(1992-),男,山东临沂人,硕士研究生,从事饲料养分生物学效价评定的研究。E-mail:qingtao_gao@163.com

收稿日期: 2018-06-01

  网络出版日期: 2018-12-19

基金资助

国家自然科学基金项目（31172215）；中国农业科学院科研英才培育工程；广东温氏食品集团股份有限公司合作项目（2018-YF-01）

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Effects of Dietary Crude Fiber Level and Feeding Time on Passage Rate of Digesta in Intestinal Tract of Growing Pigs

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  • State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Science, Beijing 100193, China

Received date: 2018-06-01

  Online published: 2018-12-19

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摘要

本试验旨在研究饲粮粗纤维水平和采食时间对生长猪肠道各段食糜通过速度的影响，为体外模拟消化过程的设置提供生理学依据。试验采用2×2完全随机设计，饲粮粗纤维水平分别为3.39%和5.56%，采食时间分别08：00和16：00。选择体重为（21.90±1.62） kg的大×长二元杂交去势公猪24头，随机分成4组，每组6个重复，每个重复1头猪，随机选择其中2组在十二指肠安装T型套管，另2组在回肠末端安装T型套管。测定饲粮中三氧化二铁（指示剂）在十二指肠、回肠末端及全消化道的出现与消失时间。结果表明：1）以食糜中指示剂颜色出现作为通过速度计时，饲粮粗纤维水平对食糜在十二指肠、回肠末端及全消化道的通过速度均有显著影响（P<0.05），采食时间对食糜在十二指肠、回肠末端通过速度均有显著影响（P<0.05），但对食糜在全消化道的通过速度无显著影响（P>0.05），两者对食糜在十二指肠的通过速度有显著交互作用（P<0.05）。与3.39%饲粮粗纤维水平相比，5.56%饲粮粗纤维水平使食糜的通过速度显著加快（P<0.05），08：00采食的食糜通过速度（除全消化道外）显著快于16：00采食的食糜通过速度（P<0.05）。2）以食糜中指示剂颜色消失或以指示剂颜色出现与消失的平均时间作为通过速度计时，饲粮粗纤维水平和采食时间对食糜在十二指肠、回肠末端及全消化道通过速度有显著的影响（P<0.05），但两者间对食糜在十二指肠、回肠末端通过速度无显著的交互效应（P>0.05），对全消化道通过速度有显著的交互效应（P<0.05）。与3.39%饲粮粗纤维水平相比，5.56%饲粮粗纤维水平使食糜的通过速度显著加快（P<0.05），08：00采食的食糜通过速度显著快于16：00采食的食糜通过速度（P<0.05）。由此可见，5.56%饲粮粗纤维水平能够提高食糜在猪消化道各段的通过速度；08：00采食的食糜通过速度高于16：00采食的食糜通过速度。

关键词： 粗纤维水平; 采食时间; 食糜通过速度; 生长猪

本文引用格式

高庆涛, 赵峰, 张虎, 王亚, 刘保良 . 饲粮粗纤维水平与采食时间对生长猪肠道食糜通过速度的影响[J]. 动物营养学报, 2018 , 30(12) : 5230 -5237 . DOI: 10.3969/j.issn.1006-267x.2018.12.052

Abstract

This study was conducted to investigate the effects of dietary crude fiber level and feeding time on the passage rate of digesta in the intestinal tract of growing pigs to provide a physiological data for the design of in vitro digestion. The dietary crude fiber levels of 3.39% and 5.56% and feeding time at 08:00 and 16:00 were used in a 2×2 factorial completely randomized arrangement. Twenty-four pigs [Duroc×Large, (21.90±1.62) kg] were randomly divided into 4 groups of 6 replicates with 1 pig in each. Pigs were fixed T-cannulas at the anterior duodenum in 2 groups and at the terminal ileum in the remaining 2 groups. The time of appearance and disappearance of ferric oxide (indicator) were observed on the duodenum, terminal ileum and the total digestive tract. The results showed as follows: 1) when the time of indicator color appearance as the passage rate of digesta, the dietary crude fiber level had significant effects on the passage rate of digesta in the duodenum, terminal ileum and total digestive tract (P<0.05), and feeding time had significant effects on the passage rate of digesta in the duodenum and terminal ileum (P<0.05), but had no significant effects in the total digestive tract (P>0.05). Significant interaction between them on the passage rate of digesta in the duodenum digesta was observed (P<0.05). Compared with dietary 3.39% crude fiber level, dietary 5.56% crude fiber level significantly fasten the passage rate of digesta (P<0.05); the passage rate of digesta fed at 08:00 (excepted for the total digestive tract) was significantly faster than that fed at 16:00 (P<0.05). 2) When the time of indicator color disappearance or mean time of appearance and disappearance as the passage rate of digesta, the dietary crude fiber level and feeding time had significant effects on the passage rate of digesta in the duodenum, terminal ileum and total digestive tract (P<0.05), there was no significant interaction between them on the passage rate of digesta in the duodenum and terminal ileum (P>0.05), but there was significant interaction on the passage rate of digesta in the total digestive tract (P<0.05). Compared with dietary 3.39% crude fiber level, dietary 5.56% crude fiber level significantly fasten the passage rate of digesta (P<0.05); the passage rate of digesta fed at 08:00 was significantly faster than that fed at 16:00 (P<0.05). These results indicate that 5.56% crude fiber level can increase the passage rate of digesta in the intestinal tract of growing pigs. The passage rate of digesta in pigs fed at 08:00 is faster than that fed at 16:00.

Key words： crude fiber level; feeding time; passage rate of digesta; growing pigs

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