Effect of biological preparations on spring wheat agrocenosis

Field experiments carried out in 2017 Experimental Station at the of Aleksandras Stulginskis University (54° 52' 55.22", 23° 50' 34.92) (Calcari-Endohypogleyic Luvisol) to assess the impact of biological preparations on soil agrochemical properties, spring wheat qualitative indicators and wheat grain yield. The experiment soil composed of neutral (pHKCl 6.8), high amount of phosphorus (226.6 mg kg-1 of P2O5), medium amount of potassium (105.0 mg kg-1 of K2O), medium humus (2.33 %). The initial size of the field – 240 m2 accounting – 128 m2. The experiment was carried out in 3 replications, arranged randomly options. Using biological preparations and fertilizing with different nitrogen rates, soil agrochemical properties are uneven. The soil humus content was substantially increased in fields sprayed with BactoMix5 and BactoMix8 mixture, fertilizing N105 nitrogen fertilizer rate. Nitrogen significantly increased in fields sprayed with Rizobacterin biological preparation. Use BactoMix5 biological preparate and fertilization of N105 nitrogen fertilizer rate has had a significant impact on the production of higher levels of wet gluten in spring wheat grains. 1.6% determined pcs higher wet gluten than in not sprayed fields. Biological preparations did not have a significant impact on spring wheat grain yield. The lowest grain yield was obtained by treating the mixture with BactoMix5 and BactoMix8 and the highest Rizobacterin biological preparationVytauto Didžiojo universitetasŽemės ūkio akademij