Premium
Effects of illite supplementation on in vitro and in vivo rumen fermentation, microbial population and methane emission of Hanwoo steers fed high concentrate diets
Author(s) -
Biswas Ashraf A.,
Lee SungSill,
Mamuad Lovelia L.,
Kim SeonHo,
Choi YeonJae,
Lee Chanhee,
Lee Kichoon,
Bae GuiSeck,
Lee SangSuk
Publication year - 2018
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.12913
Subject(s) - rumen , illite , fermentation , food science , population , zoology , hanwoo , biology , dry matter , chemistry , mineralogy , clay minerals , demography , sociology
This study was conducted to evaluate the effects of feeding supplemental illite to Hanwoo steers on methane (CH 4 ) emission and rumen fermentation parameters. An in vitro ruminal fermentation technique was conducted using a commercial concentrate as substrate and illite was added at different concentrations as treatments: 0%, 0.5%, 1.0%, and 2.0% illite. Total volatile fatty acids (VFA) were different ( P < 0.05) at 24 h of incubation where the highest total VFA was observed at 1.0% of illite. Conversely, lowest CH 4 production ( P < 0.01) was found at 1.0% of illite. In the in vivo experiment, two diets were provided, without illite and with addition of 1% illite. An automated head chamber (GreenFeed) system was used to measure enteric CH 4 production. Cattle received illite supplemented feed increased ( P < 0.05) total VFA concentrations in the rumen compared with those fed control. Feeding illite numerically decreased CH 4 production (g/day) and yield (g/kg dry matter intake). Rumen microbial population analysis indicated that the population of total bacteria, protozoa and methanogens were lower ( P < 0.05) for illite compared with the control. Accordingly, overall results suggested that feeding a diet supplemented with 1% illite can have positive effects on feed fermentation in the rumen and enteric CH 4 mitigation in beef cattle.