Humus and nitrogen content of sod-podzolic soil under the influence of biopreparations for potato cultivation

In organic potato cultivation technologies, various biopreparations are used, which have a considerable impact on both the growth and development of crops, soil fertility indicators, is especially important for sod-podzolic soils characterised by low potential fertility. The purpose study to establish changes in humus content mineral nitrogen sod-mediumpodzolic loam under influence decomposition white mustard as cover crop treatment tubers vegetative plants. two-factor experiment, following factors were examined: factor 1: control without destructor “Ecostern” at dosage 1.2 litres per hectare; 2: nine options application, including Agat, Regoplant, Mycohelp, Phytohelp, Stimpо. Soil samples collected from 0-30 cm layer sod-medium-podzolic sandy water-glacial deposits. them, total was established Tyurin method, calculated sum ammonium nitrate determined potentiometrically. application green biomass contributed an increase layer, where it ranged 1.135% 1.24%, compared 1.025% 1.15% use bio-destructor. A reverse dependence observed terms content. with Ecostern destructor, average 2.09 mg/kg lower destructor. highest option 8, involved “Phytohelp” treating 1.0 litre ton three-fold hectare during vegetation period. 1.24% It slightly lagged behind 9 biopreparations. materials presented may practical value agricultural enterprises engaged growing potatoes ensure preservation reproduction matter