Chemical and Microbiological Studies for Determination the Influence of Fertilizers Produced by ?Agropolychim? Ad on Winter Common Wheat and Oilseed Rape

Chemical and microbiological analysis have been performed with various fertilizers from Agropolychim AD in order to determine their influence on winter common wheat and oilseed rape. The experiment was carried out in a greenhouse twice and the fertilizers were introduced during the pro-sowing period. The analysis of the investigated biogenic elements was performed during wheat's tillering phase and at the end of rape's rosette phase. The sample treated with Ammonium Nitrate of the wheat had the highest content of Ammonium Nitrogen, and the Nitrogen (Nitrate) was of the highest value when treated with Diammonium Phosphate. During the test with rapeseed the highest content of Ammonium Nitrogen was registered in the case of Urea - Ammonium Nitrate (UAN), while the values of Nitrogen (Nitrate) were the highest by the compound fertilizer NPK. The results also showed that the highest was the content of acquired Potassium as a result of applying NPK, in both crops. As a result of using MAP and DAP were reported the highest results for moving phosphates in the soil. The used fertilizers increased the biogenetics of the soils - the total microflora had higher values by the treated soil samples in comparison to the control sample, except of treatment wheat with MAP and rapeseed with Urea - Ammonium Nitrate (UAN). The highest percentage in the composition of the soil microflora held ammonifying bacteria (non-spore forming bacteria and bacilli), followed by actinomycetes and micromycetes.