Soybean seed yield and yield quality depending on the fertilizers doses and application methods

We conducted our researches in fields of “Berezanskoe” farming in Korenovsk district, Krasnodar region, in 2016 and 2018. The purpose of the research is to study responsibility of a soybean early maturing cultivar Lira on different methods of mineral fertilizer application. We determined yield increases after seed inoculation with tubercle bacterium preparation combined with: foliar fertilizing of plants in the beginning of flowering - 0.17 t per ha, nitrogen-phosphorus (N6P26 and N12P52) fertilizer applied during sowing, full mineral (N6P26К18 and N12P52К18) fertilizer and foliar fertilization - 0.26-0.32 t per ha. Fertilizers did not influenced significantly on protein and oil content in seeds, the values varied in limits 40.3-40.7% and 22.5-22.9%, respectively. We revealed a negative correlation between protein content in seeds and seed yield: y = -0.86x + 42.2 (r = -0.625); protein and oil contents: y = -1.28x + 69.5 (r = -0.953). Fertilizers applied during planting caused increases in protein yield by 64-115 kg per ha, oil yield - by 36-70 kg per ha compering to control (only seeds inoculation), and by 34-51 and 19-34 kg per ha, respectively, compared to foliar fertilizing and seeds inoculation...