The efficiency of nitrogen fertilizer on the dry matter yield of tall fescue and festulolium grown as feedstock for combustion

摘要

Grass biomass grows during one vegetation season and can be cultivated and consumedat the place of breeding. Grass biomass can be used not only in traditional feed, but, recently, alsofor energy production (biogas, solid fuels). The most important economic indicator for any cropis its productivity. The study found that it is important to use nitrogen fertilizer to increase theproductivity of tall fescue and festulolium. A significant increase (p < 0.05) in the yield of tallfescue was observed starting from the nitrogen norm of 60 kg ha-1 N. Further increase in nitrogenfertilizer norm provides a significant increase in dry mater yield of tall fescue (reaching8.64 t ha-1) and festulolium (reaching 8.11 t ha-1) at 180 kg ha-1 N. The analysis of linearregression coefficients of polynomials showed that the highest nitrogen efficiency in the first yearof the use of tall fescue was achieved at the norm of 180 kg ha-1 N, but for festulolium – at thenorm of 120 kg ha-1 N. In the following years of tall fescue use, the highest efficiency of nitrogennorms differed: in the 2nd and 4th year of use – at 60 kg ha-1 N, in the 3rd year of use – at30 kg ha-1 N, and in the 5th year of use – at 120 kg ha-1 N. In contrast, for festulolium, in the 2ndyear of use, the highest nitrogen efficiency was reached at the norm of 30 kg ha-1 N, and in the3rd–5th year of use – at the norm of 60 kg ha-1 N.