Mineral and Bacterial Fertilisation Effect on the Number of Fungi in Soil Under Winter Wheat and the Yield of Wheat

Abstract

In 2007, the influence of the sampling period and different rates of applied mineral fertilisers and their combinations with bacterial inoculants (nitrogen (N)-fixing Klebsiella planticola and Enterobacter sp.) on the number of fungi in Eutric cambisol and the yield of winter wheat was evaluated in this study. The following variants were studied: control (non-fertilised soil); 60 kg ha–1 N and P2O5, and 40 kg ha–1 K2O (N1, low rates of mineral fertilisers); 120 kg ha–1 N, P2O5 and K2O (N2, high rates of mineral fertilisers); Enterobacter sp. strains + N1; Enterobacter sp. strains + N2; K. planticola + N1; K. planticola + N2. The effect of the studied fertilisers was determined two times over the wheat growing season, the number of fungi being determined by indirect dilution method on Chapek nutritive medium. The results of the study showed that the applied high content of mineral fertilisers, as well as their combination with bacterial inoculants used, brought about the highest increase in the number of fungi during studied vegetation periods of wheat, as well as the highest increase in the grain yield of wheat. The highest number of soil fungi was registered in the second sampling period.