Changes in ruminal and reticular pH and bacterial communities in Holstein cattle fed a high-grain diet.

ABSTRACT:

Background

Subacute ruminal acidosis (SARA) is characterized by a ruminal pH depression, and microbiota can also be affected by a higher acidity and/or dietary changes. Previous studies have revealed similar patterns in pH reduction in the rumen and reticulum, whereas changes in reticular pH and bacterial community following a high-grain diet are not fully understood. The aim of this study was to investigate the changes in reticular pH and bacterial community structure following a high-grain diet simultaneously with those in the rumen.

Results

SARA was diagnosed when ruminal and reticular pH remained under 5.6 for 350 ± 14 and 312 ± 24 min/d, respectively, on the last day of the CON period. During the CON period, lower proportion of acetic acid and higher proportion of butyr

SUBMITTER: Kim YH 

PROVIDER: S-EPMC6186129 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature