Biodelignification and Changes in<i>in vitro</i>Digestibility of Sugarcane Bagasse Treated with White Rot Fungi

Abstract

Abstract Kamra, D.N., Kewalramani, N., Lall, D. and Pathak, N.N. 1993. Biodelignification and changes in in vitro digestibility of sugarcane bagasse treated with white rot fungi. J. Appl. Anim. Res., 4: 133–140. The biodegradation of sugarcane bagasse and its components by different strains of white rot fungi i.e. Stropharia rugosoannulata, Ganoderma lucidum, Pleurotus ostreatus, Pleurotus—131, Pleurotus—137, Pleurotus P7H7, Polyporus versicolor, Polyporus adustus, Polyporus sanguineus and Polyporus cinnibarinus was studied. During the first phase of growth (0–20 days) hemicellulose was selectively degraded whereas during the second phase (21–40 days) lignin was preferentially degraded in comparison to the other substrate components. The maximum degradation of dry matter was observed in Polyporus sanguineus treated group, but lignin degradation was highest by Polyporus versicolor. The largest increase in in vitro digestibility and nutrient availability was observed on Ganoderma lucidum treatment. Among the fungal strains tested, only G. lucidum, S. rugosoannulata and Pleurotus—137 caused an increase in IVDMD by more than 10 per cent units and were able to improve the nutrient availability from sugarcane bagasse on fungal treatment. Key words: Sugarcane bagassewhite rot fungidelignification in vitro dry matter digestibility