CHANGES IN THE CONTENT OF STRUCTURAL CARBOHYDRATES AND LIGNIN IN THE BIOMASS OF Lolium multiflorum (Lam.) AFTER APPLYING SLURRY WITH BIOPREPARATIONS AND WITH NPK
Background. The research aimed at determining the effect of slurry supplemented with biopreparations UGmax and Humus Active and with NPK on the content of structural carbohydrates and lignin in the biomass of Lolium multiflorum.
Material and methods. A two-year field experiment in three replications with a completely randomized design was set up on an experimental plot of Siedlce University of Natural Sciences and Humanities. The cv. Dukat was tested. Plant material samples were taken from three cuts in each research year. Near infrared spectroscopy (NIRS) was used to determine the cellulose, hemicellulose and lignin contents.
Results. Using biopreparations and mineral NPK fertilizers increases cellulose, hemicellulose and lignin contents in the obtained biomass compared with the biomass fertilized only with slurry. When considering particular cuts, regardless of fertilization and research year, a slight decrease was observed in the content of cellulose and hemicellulose in line with the order of harvest. A higher content of cellulose and lignin and a lower content of hemicellulose in the harvested biomass of Lolium multiflorum was recorded in the second year.
Conclusion. The content of cellulose, hemicellulose and lignin in the biomass of Lolium multiflorum only underwent significant changes under the effect of the applied fertilization. Supplementing slurry with biopreparations and mineral NPK caused an increase in the content of cellulose, hemicellulose and lignin in the obtained biomass as compared with the biomass fertilized only with slurry.