Related Experiment Video
Updated: Mar 17, 2026
06:23
Applying Advanced In Vitro Culturing Technology to Study the Human Gut Microbiota
Published on: February 15, 2019
15.0K
Insights into Abundant Rumen Ureolytic Bacterial Community Using Rumen Simulation System
Di Jin1, Shengguo Zhao2, Pengpeng Wang2
1State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural SciencesBeijing, China; Animal Science Unit, Gembloux Agro-Bio Tech, University of LiègeGembloux, Belgium.
Frontiers in Microbiology
|July 23, 2016
Summary
Rumen bacteria like Bacillus and Pseudomonas utilize urea for growth. Identifying these ureolytic bacteria helps improve nitrogen utilization efficiency in dairy cows.
Area of Science:
- Rumen microbiology
- Animal nutrition
Background:
- Urea is a key non-protein nitrogen source for ruminants.
- Rumen bacteria rapidly hydrolyze urea to ammonia via urease.
- Understanding ureolytic bacteria is crucial for optimizing nitrogen utilization.
Purpose of the Study:
- To identify and characterize the ureolytic bacterial community in dairy cow rumens.
- To investigate the impact of urea and urea hydrolysis inhibitors on this community.
Main Methods:
- Rumen simulation systems were used with urea or acetohydroxamic acid (AHA) supplementation.
- Bacterial 16S rRNA genes were sequenced using Miseq high-throughput sequencing.
- Bioinformatic analysis and database comparisons identified key bacterial genera.
Main Results:
- Urea supplementation increased ammonia concentration and ureC gene abundance.
- Acetohydroxamic acid inhibited urea hydrolysis.
- Bacillus and unclassified Succinivibrionaceae abundance increased with urea.
- Pseudomonas, Haemophilus, Neisseria, Streptococcus, and Actinomyces responded positively to urea and negatively to AHA.
Conclusions:
- Rumen ureolytic bacteria are abundant in genera including Pseudomonas, Bacillus, and Streptococcus.
- Identifying these bacteria provides targets for mitigating urea hydrolysis.
- This research aids in increasing urea nitrogen utilization efficiency in ruminants.
