The influence of tested biological preparations on winter wheat productivity in different fertilization backgrounds

The main objective was to evaluate the influence of tested biological preparations on winter wheat productivity in different fertilization backgrounds. Field experiment was conducted in 2012–2013 at ASU Experimental Station. The soil type – Calc(ar)–Epihypogleyic Luvisol (LVg – pw – cc). The biggest winter wheat yield (8,1 t ha-1) was obtained in the variant where a combination of Azofix (1,0 l ha-1), Fosfix (1,0 l ha-1) and Amalgerol (3,0 l ha-1) was sprayed and fertilization rate N160 was used, it was 1,45 t ha-1 higher than in the control, in which biological agents have not been used. The biggest winter wheat crop density also was obtained in the variant where a combination of Azofix (1,0 l ha-1), Fosfix (1,0 l ha-1) and Amalgerol (3,0 l ha-1) was sprayed and fertilization rate N160 was used. The biggest winter wheat plant productivity (1,21 g) was obtained in the variant where a combination of Azofix (1,0 l ha-1) and Fosfix (1,0 l ha-1) was sprayed and fertilization rate N140 was used, it was 0,33 higher than in the control, in which biological agents have not been used. Because of the effect of biological preparations on winter rapeseed yield structure elements (points in the plant pods, pods and seeds of plant, 1000 seed weight) tended to increase. Biological preparations improve soil properties and initiates plant physiological processes, optimize nutrition. The evaluation of clinical data, recommended for biologics Azofix (1,0 l ha-1), Fosfix (1,0 l ha-1) and Amalgerol (3,0 l ha-1) in combination for useVytauto Didžiojo universitetasŽemės ūkio akademij