Penggunaan Kromium Organik dari Beberapa Jenis Fungi terhadap Aktivitas Fermentasi Rumen Secara in Vitro
ABSTRACT: Chromium appears to
be an essential trace element since 1959, but its effect on ruminal microbes is
not clear yet. This experiment was conducted to study the effects of organic chromium
supplementation on rumen fermentation activity.
An in vitro technique was held
using randomized block design with 13 treatments and 3 replications. There were
four kinds of organic Cr used, produced with four different species of fungi as
carriers. Fungi used as carriers were
Saccharomyces cerevisiae, Aspergillus oryzae, Rhizophus oryzae and “ragi
tape”. The result indicated that the optimum organic Cr supplementation was 1 mg
organic Cr/kg dry matter. Supplementation of 1 mg organic Cr/kg dry matter
increased dry matter and organic matter digestibilities. It also tended to
increase NH3 and total VFA production. Propionate production increased, which
decreased methane production and increased hexose conversion efficiency in
several treatments. Each fungus used as carrier of organic Cr resulted in
different effects on rumen fermentation activity, but the effects was within a
normal range. It was concluded that either
Saccharomyces cerevisiae, Aspergillus oryzae, Rhizophus oryzae or “ragi
tape” could be used as carrier in organic Cr production.
Key words: organic Cr, ruminal microbes, Saccharomyces cerevisiae,
Aspergillus oryzae, Rhizophus oryzae,
“ragi tape”
Penulis: W.D. Astutia, T.
Sutardib, D. Evvyernieb & T. Toharmatb
Kode Jurnal: jppeternakandd060048
