The variation of structural biopolymers in the biomass of perennial grasses used for biogas

摘要

Biomass of grasses as raw material for biogas production is rich in easily biodegradable components such as lipids, sugars, proteins and starches. On the other hand, it contains more than 60 percent of other fractions - hemicellulose, cellulose and lignin whose microorganisms are more difficult to degrade. The concentration of structural biopolymers in the biomass depends on grass species. The aim of the present study was to evaluate the variation of the concentration of hemicellulose, cellulose andlignin in the biomass of perennial grasses grown under different conditions. Two (three in 2009) or three (four in 2009) cuts per season of tall fescue, cocksfoot and reed canary grass were managed with two nitrogen fertilization levels N_(90) and N.