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Effect of monensin withdrawal on rumen fermentation, methanogenesis and microbial populations in cattle
Author(s) -
Abrar Arfan,
Tsukahara Takamitsu,
Kondo Makoto,
BanTokuda Tomomi,
Chao Wang,
Matsui Hiroki
Publication year - 2015
Publication title -
animal science journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.606
H-Index - 38
eISSN - 1740-0929
pISSN - 1344-3941
DOI - 10.1111/asj.12368
Subject(s) - monensin , rumen , methanogenesis , fermentation , zoology , biology , population , straw , food science , chemistry , agronomy , bacteria , demography , sociology , genetics
This study was designed to obtain information on the residual influence of dietary monensin on ruminant fermentation, methanogenesis and bacterial population. Three ruminally cannulated crossbreed heifers (14 months old, 363 ± 11 kg) were fed Italian ryegrass straw and concentrate supplemented with monensin for 21 days before sampling. Rumen fluid samples were collected for analysis of short chain fatty acid ( SCFA ) profiles, monensin concentration, methanogens and rumen bacterial density. Post‐feeding rumen fluid was also collected to determine in vitro gas production. Monensin was eliminated from the rumen fluid within 3 days. The composition of SCFA varied after elimination of monensin, while total production of SCFA was 1.78 times higher than on the first day. Methane production increased 7 days after monensin administration ceased, whereas hydrogen production decreased. The methanogens and rumen bacterial copy numbers were unaffected by the withdrawal of monensin.