Consequences of maize cultivation intended for biogas production

摘要

A standard concept of biogas plants - strong maize silage concept is due to its high economic advantage as the maize silage is one of the most effective substrate for anaerobic digestion in matter of biogas yield. Increasing demand for maize silage, reflected in a rise of its price, endangers the economic effectiveness and therefore economic sustainability of the biogas sector. This situation also creates negative externalities related to upward pressure on food prices and lower livestock production. Moreover, biogas plants focused primarily on maize silage could increase the area of arable land for growing maize for energy purposes and decline the production of crops for human nutrition. The paper focuses on examination of consequences of maize cultivation intended for biogas production in case of Slovakia. The results show the impact of biogas production via anaerobic digestion on area of land used for maize production and live bovine animal production.