Productivity of cereal grasses with different ripening time depending on fertilizers

Abstract

Aim. To determine productivity indicators of perennial cereal grasses with different ripening time depending on fertilizer. Methods. Field, laboratory, mathematical-statistical, economic-mathematical. Results. The results of studies on the productivity of perennial cereal grasses with different ripening time depending on fertilization on the sod-podzolic soil of the Carpathian region conducted during 2011−2013 are shown. Conclusions. Productivity of various types of perennial grasses on nitrogen-free backgrounds varied between 2.53–3.71 t/ha of dry weight, 1.81–2.67 t/ha of feed units, 0.27–0.42 t/ha of crude protein and 20.4−30.4 GJ/ha of exchangeable energy. The most productive were perennial fenugreek, festuca orientalis, awnless brome and reed canary grass. Nitrogen is the most effective nutrient element for the productivity of cereal grass stands. With the introduction of P60K60, compared to the option without fertilizers, productivity increases by 3–23%, N90 against the background of phosphorus and potassium – by 1.8–2.1 times. The difference in harvest ripeness between early- and medium-ripening grass stands in the 1st mowing was 12 days, and between early- and late-ripening – 22 days.