... yield 2.high contents of lignin and cellulose of their biomass 3.carbon content is very ... high yield 2.high contents of lignin and cellulose of their biomass 3.carbon content is very ... material, the cell wall is rich in lignin, cellulose and hemicellulose, this is as essential to the ... , the biomass of perennial grasses, lignin and cellulose content was higher than annual plants.Production and utilization ...