Influence of biological preparation on soil properties

https://doi.org/10.7220/9786094674662; https://zua.vdu.lt/wp-content/uploads/2020/12/Agroeco_2020_Abstracts-Book.pdfBiological preparation with microorganisms are not only important in maintaining the soil structure, but they also perform organic matter degradation, increase the availability of nutrients to plants. Biological preparations promote the absorption of nutrients even in extreme conditions. However, there is a lack of research to explain how biological preparations affect soil agrochemical properties and how their distribution is affected by different rate of nitrogen fertilizer.The investigations were carried out at the Experimental Station of Vytautas Magnus University Agriculture Academy, Lithuania, in 2018–2019. The aim was to investigate the influence of biological preparations on soil pH, phosphorus (P), potassium (K), nitrogen (total, N) and humus content.A two-factor field experiment was conducted to determine the effect of biological preparations on soil properties. Field experiment treatments: spraying of biological preparations (Factor A): 1) not sprayed, 2) Bactogen + Aurin spray, 3) BactoMix5 spray (in spring), 4) Stimulin spray, 5) BactoMix5 spray (in autumn). Different rates of nitrogen fertilization (factor B): 1) N105; 2) N165.The use of biological preparations had positive influence on the agrochemical soil properties. Biological preparations significantly (P