Plant and Soil Science

 The article presents the results of studies carried out in 2011-2015 for the study of microbiological activity of the southern chernozem, depending on treatment of crop residues of cereals and legumes by the stubble biodestructor in the conditions of southern steppe of Ukraine. It was studied the effect of the biopreparation on the total bacterization of the soil, the number of micromycetes and nitrogen fixators in it. It was determined that before the treatment of peas crop residues by the stubble biodestructor in the soil layer 0 – 10 cm there were 5.3·107 PCs/1 g soil bacteria, and in the layer 10 – 20 cm there were 4.8·107 PCs/ 1 g soil, respectively, 1.8 · 107 and 2.2 · 107 PCs/1 g soil more than the samples after growing spring barley. The treatment of crop residues by stubble biodestructor, on average for precursor cultures led to an increase in the total number of bacteria in the soil on 7.3·107 up to 7.5·107 PCs/1 g of soil or 63.0 up to 66.4% depending on the investigated layer. The use of peas, compared with spring barley, provided a slightly higher microbiological activity of the soil. Thus, the number of nitrogen fixators in the soil layer 0 – 10 cm was higher by 17.8 up to 23.4%, and in the layer 10 – 20 cm it was higher by 20.3 up to 29.0%, depending on the treatment of post-harvest residues. 

stubble biodestructor, soil bacterization, micromycetes, nitrogen fixators, peas, spring barley