The influence of different agrotechnical measures on miscanthus grass productivity

Miskantus (Miscanthus x giganteus) je energetska kultura koju karakterizira visoka produktivnost biomase, otpornost na bolesti i štetnike te niski gnojidbeni zahtjevi. Ovisno o tipu goriva koje se želi proizvesti, žetva miskantusa se može obaviti u jesen ili na proljeće. Uspjeh zasnivanja usjeva ovisi o brojnim čimbenicima, među kojima je i vrsta sadnog materijala. Trenutno dostupan sadni materijal čine reznice rizoma i presadnice. U današnje vrijeme sve više raste broj energetskih postrojenja na biomasu, u kojima se stvaraju velike količine pepela, čije zbrinjavanje predstavlja problem. Cilj rada je utvrditi postoji li utjecaj različitih agrotehničkih mjera (rok žetve, vrsta sadnog materijala i tretmani pepelom) na produktivnost (prinos suhe tvari, visinu biljke i broj izboja) energetske biljke miskantus. Rezultati istraživanja pokazali su da najveći utjecaj na prinos biomase miskantusa ima vrijeme žetve. U jesenskoj žetvi postignuti su veći prinosi, koji su u prosjeku iznosili 34,0 t/ha suhe tvari, dok su u proljetnoj žetvi prosječni prinosi iznosili 21,0 t/ha suhe tvari.Miscanthus (Miscanthus x giganteus) is an energy crop characterized by high biomass productivity, resistance to diseases and pests, and low fertilization requirements. Depending on the type of fuel to be produced, the miscanthus harvest can be done in the fall or spring. The success of crop establishment depends on a number of factors, including the type of planting material. Currently available planting material consists of rhizome cuttings and seedlings. The number of biomass power plants is constantly growing, and they generate large amounts of ash, the disposal of which is a problem. The aim of this study is to determine if there has been an impact of different agrotechnical measures (harvest date, type of planting material and ash treatments) on productivity (dry matter yield, plant height and number of shoots) of miscanthus energy plant. The results of the research showed that the greatest influence on the biomass yield of miscanthus has the time of harvest. In the autumn harvest, higher yields were achieved, which averaged 34,0 t/ha of dry matter, while in the spring harvest the average yields were 21,0 t/ha of dry matter