EVALUATION OF DIFFERENT TREATMENTS FOR IMPROVING EFFICIENCY OF UTILIZATION OF AGRICULTURAL BY-PRODUCTS IN RUMINANT FEEDING

Abstract

agriculture by-product utilization, as well as in vivo studies to the elected treatments. This study was carried out in 5steps; in the first one, nine different microorganisms were used in bio-upgrading the chemical composition and nutritive values of rice straw. In the second in vitro evaluation for effect of inclusion of the bio-upgraded rice straw in ruminant rations using two technique (batch culture and RUSITEC technique). In the third step the nine microorganisms media were used to produce direct fed microbes (DFM). In the fourth step in vitro evaluation for effect of supplementing ruminant rations with different DFM using two technique (batch culture and RUSITEC). The fifth step was to evaluate in vivo trials for the best DFM supplementation. Biodegradation of rice straw with different fungal and bacterial microorganisms decreased organic matter (OM), crude fiber (CF), neutral detergent fiber (NDF), acid detergent fiber (ADF) and cellulose content compared to untreated rice straw. However, crude proteins (CP), ash, acid detergent lignin (ADL), hemicellulose and non-fiber carbohydrate (NFC) contents were increased for biological treated rice straw compared to untreated. All rations containing biologically treated rice straw had no significant higher dry matter degradability (DMD) than that of the control ration. A significant increase was observed in OMD and the amount of total gas accumulated per g DM, OM, NDF and ADF for the rations containing biological treated rice straw compared to that containing untreated rice straw.