The influence of biological preparations and their mixtures on soil agrochemical properties in winter wheat

Intensive tillage accelerates soil erosion, reduces the content of organic matter and carbon in the soil. Scientists around the world talk extensively about soil conservation policies. The process of accumulation and maintenance of soil organic matter is important for the long-term preservation of agro-system productivity. Crop production technologies applied should increase carbon sequestration in the soil (Kaiser, Kalbitz, 2012; Baumhardt et al., 2015). The study was conducted in 2018–2019 in the winter wheat crop “Sailor”. An experiment with two factors was performed: preparations of biological origin and their mixtures were used with the application of different tillage technologies. The aim of this study is to determine the effect of biological preparations on soil agrochemical properties in winter wheat crop using different tillage technologies. The use of biological preparations and their mixtures, in many cases, increased the content of water-soluble (labile) carbon in the soil comparing compensatory nitrogen 8 kg t of straw, without biological preparations to stimulate straw mineralization . The content of labile carbon was particularly increased by mixtures of two preparations (Ruinex + Penergetic k, Ruinex + Azofix and Penergetic k + Azofix) using both tillage technologies: when applying no-tillage, the content of soluble carbon increased from 2.9% to 12.2%, and when using the mixtures in ploughless tillage – from 1.4% to 10.3. The combination of the three preparations increased the content of soluble carbon by 5.4% more in ploughless technology, in no-tillage – only 0.5%. The use of one-component biological preparations in ploughless tillage also increased the content of water-soluble carbon, and in no-tillage – reduced it but insignificantly.