Abstract

A. S. M. Selim, M. M. Rahman., M. Jahan, S. A. M. Hoque, M. E. Rabbi, M. D. Hossain,M. Fonseca, W. L. Crossland and L.O. Tedeschi

The objectives of this study were to use the in vitro gas production (IVGP) technique to evaluate the pattern and parameters of anaerobic fermentation of probiotic-treated rice straw collected from local market of Gazipur district, Bangladesh. Probiotic-treated rice straw was assessed for their chemical composition, total digestible nutrients (TDN), the fractional rate of degradation (kd) characteristics, and in vitro gas production measurements. In general, probiotic treatment improved the crude protein (CP) content and maximum increase was 15%. The response to urea treatment on CP content almost doubled the CP content of untreated straw. Trichoderma spp. and Aspergillus spp. also increased the CP content. However, the ADF content in the probiotic-treated rice straw was similar to control but significantly higher in urea, Trichordema, and Aspergillus spp.The trend of total in vitro gas production increased up to 48 h for all treatments. Most of the probiotic-treated rice straw showed similar TDN and kd, but there were some differences. Mineral concentration did not vary among treated groups. Non-fiber carbohydrates (NFC) concentration was almost half in the probiotic-treated rice straw, suggesting a greater release of NFC for microbial utilization. Moreover, the relative feed value was higher in treated straws compared to control. In conclusion, the probiotic-treated rice straw improved nutritional quality and provided better fermentation pattern regarding the kd and gas production