Biological preparations and nitrogen fertilization influence to winter wheat productivity

Leidinio DOI: https://doi.org/10.7220/1822-9913.2021The research was carried out in 2019–2020 at the Experimental Station of the Agricultural Academy of Vytautas Magnus University. Experimental field soil limnoglacial loam on moraine loam carbonated deeper gleyic leachate (Calcari-Endohypogleyic Luvisol). The loam is dominated by heavy loam. The aim of the research – to determine and compare the effects of different biological preparations and different rates of nitrogen fertilizers on winter wheat yield. Research results – biological preparations did not have a significant effect on the number of productive stems of winter wheat (P > 0.05). Both studied biological preparations tended to increase this indicator by fertilizing wheat with N105 and N165 nitrogen. Biological preparations and fertilization with different amounts of nitrogen did not have a significant effect on the area of winter wheat leaf, but there was a tendency to increase it. The largest leaf area was of wheat grown using biological preparation B fertilizing with N105. The yield of winter wheat was significantly (P < 0.05) increased by both studied biological preparations by fertilizing wheat with nitrogen N105, in comparison with the yield of wheat fertilized with N165, where biological preparations were not used. Both preparations tended to increase wheat yield regardless of different nitrogen fertilizationAgronomijos fakultetasVytauto Didžiojo universiteta