| dc.description.abstract | Organic chromium has higher availability than inorganic chromium sources. One of organic Cr h w n is Cr inoorporated to protein fungi. Info~tion about the best fungi or m i ~ s usmed in organic Cr production is still limited Tbus, this expabent was comlwted to study about organic chmium production using cliff- kind of fungi as its carrier, and and evaluate its effects on rumen' fermentation activity. The eqmhtnt consist of two steps. Orgatllc Cr production was c o n d d with a 4x3 factwid Compldy Randomized Design with 3 replication Four fungi used as courier in organic Cr production as first factor were S a c ~ ~ceerevsisia e, AspergilIta o w e , M izopk 0- a d" mgi tape". Second factor was level of chromium addition (500, 1000 dan 1500 mg/kg). Effects of organic chcmium supp1em4on on rumen fermentation activity measured with in vim technique, using Raudomhd Blmk Design with 13 merits and 3 replication. Addition of 1000 rn@g Cr gave the highest Cr incorpoxation to fungi protein (484 mgi'kg) and Cr hcqmmtion efficiency (21,06%). Best fungi used as carrier in organic Cr producbon was Rhizoptnrs oryzae which gave the highest Cr incorporation (488 m@g) and inmpmtion efficiency (24,Ph). Supplementation of I mflg organic Cr increased dry matter and organic matter digestibility in a h kid of fungi used as carrier. It tends to incmsad NF& and total VFA w o n . Partial VFA profile s h o d iacreased propionate p d u c t i g which d e a a d methane production atmd increased hexose convertion efficiency in d lmttmats. Suggested organic Cr wed was 1 m@gg Each h g i used as carrier in o ~ c C r a s u t t e d ~ e f f e c t s m n u n e n f ~ ~ ~ a c t i v i t y , b ~ ~ ~ no m e result showed. It could be concluded that wether Sawhmyces cerevt;piae, AsprgiZIus mywe, MRophus o w e or "IT@ tape" could be US& as carrier in organic Cr pdwt~on | id |
