摘要：Biogas production in an agricultural biogas plant is connected with generation of large amounts of post-digestion liquid as a result of anaerobic decomposition of plant debris.Due to its physicochemical properties post-digestion liquid can be used as a fertilizer.A possibility of agricultural utilization of digestate as a fertilizer was investigated.Digestate obtained from an agricultural biogas plant was tested for the content of macroelements and heavy metals.The content of macroelements was also examined in the soil before and after digestate application.Digestate was used for in the cultivation of fodder alfalfa,winter wheat and winter rape.The analysis showed a similar content of macroelements in alfalfa leaves fertilized both with post-digestion liquid and mineral fertilizers as well.The content of macroelements as well as the content of protein in the grains of winter wheat fertilized with digestate were on the same levels as in the grains of wheat fertilized with mineral fertilizers.Similar tendency was also observed in winter rape grains.The study has shown that digestate can be used as a fertilizer.
