title: Improvement of dry matter digestibility of water hyacinth by solid state fermentation using white rot fungi.
abstract: Feeding value of water hyacinth biomass colonized by three species of white rot fungi during solid-state fermentation was investigated. All three organisms proved to be efficient degraders and enhanced dry matter digestibility. Loss of organic matter was maximum (23.6+/-0.1% dry wt) after 48 days by P. ostreatus. C. indica showed maximum cellulose degradation (18.5+/-0.1% dry wt) than other two fungi after 48 days of incubation. In all cases, an extensive removal of hemicellulose at the initial growth period and a delayed degradation of lignin were observed. Hemicellulolysis was maximum (46.3+/-0.1% dry wt) by C. indica, but delignification (14.2+/-0.2% dry wt) by P. sajor-caju after 48 days. The amount of reducing sugar in the degraded biomass decreased at early stages, but increased as degradation progressed in all three cases (maximum 1.1+/-0.05% dry wt after 48 days by C. indica). Soluble nitrogen content increased only during 16-32 days of incubation (highest 1.1+/-0.1% dry wt after 32 days by P. sajor-caju). Crude protein of the bioconverted biomass increased gradually up to 32 days but decreased thereafter (maximum 10.3+/-0.1% dry wt after 32 days by P. sajor - caju). Per cent change in in vitro dry matter digestibility of degraded substrates enhanced gradually after 8 days and reached maximum after 32 days but thereafter decreased (highest + 20.4+/-0.3% dry wt by P. sajor-caju). The results demonstrated the efficient degrading capacity of the test fungi and their potential use in conversion of water hyacinth biomass into mycoprotein-rich ruminant feed, more so by P. sajor-caju.
authors.affiliation: Mycology and Plant Pathology Section, Department of Botany, University of Burdwan, Golapbag, Burdwan 713 104, India. gmustafa@sancharnet.in
authors.forename: R
authors.initials: R
authors.lastname: Mukherjee
authors.forename: M
authors.initials: M
authors.lastname: Ghosh
authors.forename: B
authors.initials: B
authors.lastname: Nandi
mesh_terms: D000821:Animal Feed; D000818:Animals; D001673:Biodegradation, Environmental; D018533:Biomass; D004063:Digestion; D031806:Eichhornia / Q000737:chemistry; D005285:Fermentation; D020076:Pleurotus / Q000378:metabolism*