부산대학교 도서관

The investigation was undertaken to enhance the decomposition process by pre-treatment of rice stuble, having higher con- centration of lignin. Air-dried rice stubble was treated with 1.8 liter of 1% NaOH and autoclaved. Six celulolytic fungi,Trichoderma harzianum, Penicillium citrinum, ,Aspergillus flavus and Alternaria alternata were grown in basal synthetic medium along with delignified rice-residue as carbon source for production of soluble crude protein. Though the loss of cellulose has been observed by all of them but having a considerable status in the presence of T. harzianum and T. harzianum yielded highest percentage of crude protein (27.99%) with biomass of 375 mg, whereas the lowest protein value (17.91%) was recorded in case of A. niger with biomass of 422 mg. Among the imperfect fungi, T. harzianum was the most potent. Effects of incubation period and nitrogen sources on soluble crude protein production by T. harzianum were sources was found most appropriate for soluble crude protein production by the mentioned organism.