RUMINANT AND HERBIVORE NUTRITION AND FEED

Effects of Dietary Amylose/Amylopectin Ratio on Rumen Fermentation and Bacterial Community in Weaned Lambs

  • YIN Mengjie ,
  • WANG Shuiping ,
  • RAN Tao ,
  • CHEN Kai ,
  • YANG Dasheng ,
  • LIU Yong ,
  • TANG Shaoxun ,
  • HUANG Qi ,
  • ZHANG Yongkang ,
  • TAN Zhiliang
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  • 1. Key Laboratory of Agro-Ecological Processes in Subtropical Region, National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Hunan Provincial Key Laboratory of Animal Nutrition Physiology and Metabolism, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;
    2. College of Animal Science and Technology, Southwest University, Chongqing 402460, China

Received date: 2021-02-24

  Online published: 2021-09-18

Abstract

This study aimed to investigate the effects of different dietary amylose/amylopectin ratios on the rumen bacteria, fermentation and the papilla morphological characteristics in the weaned lambs, and provide data support for the formulation of lamb diets. Twenty-seven Xiangdong black lambs with similar initial body weight were randomly allocated to three dietary amylose/amylopectin ratios (0.263, 0.611 and 1.833) in a complete randomized block design. There were nine lambs per treatment. The experiment lasted for 35 days, including 7 days of pre-test period and 28 days of trial period. The results showed that except for the neutral xylanase activity, rumen papilla width and the unmber of Prevotella ruminicola in solid phase of rumen digesta, dietary amylose/amylopectin ratio did not affect the rumen fermentation, enzyme activity, rumen bacterial community, and the height and area of rumen papilla (P>0.05). The neutral xylanase activity (P=0.009) and the width of rumen papilla (P=0.010) were significantly increased, and the number of Prevotella ruminicola in solid phase of rumen digesta was significantly decreased (P=0.010) when the ratio of dietary amylose/amylopectin ratio increased from 0.263 to 1.833. In conclusion, the results suggest that the proper enhancement of dietary amylose/amylopectin ratio can benefit the ruminal microbial enzyme activities and the rumen papilla growth for the weaned lambs. According to the results of this study, it is recommended that the amylose/amylopectin ratio maintaining at 0.611 is suitable for Xiangdong black lambs.

Cite this article

YIN Mengjie , WANG Shuiping , RAN Tao , CHEN Kai , YANG Dasheng , LIU Yong , TANG Shaoxun , HUANG Qi , ZHANG Yongkang , TAN Zhiliang . Effects of Dietary Amylose/Amylopectin Ratio on Rumen Fermentation and Bacterial Community in Weaned Lambs[J]. Chinese Journal of Animal Nutrition, 2021 , 33(9) : 5142 -5151 . DOI: 10.3969/j.issn.1006-267x.2021.09.034

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