Transformation of nitrogen and urease activity when using herbicides

The aim of the work was to assess the influence of herbicides on the conversion of nitrogen compounds, the activity of leached Chernozem urease, and the productivity of maize in the forest-steppe zone of Krasnoyarsk Region. The studies were carried out on leached Chernozem of experimental hospital of Krasnoyarsk SAU in 2018. The scheme of the experiment was represented by the following options (Bayer preparations): 1. Control; 2. Adengo; 3. Meister CombiPack; 4. Meister. The experiment was built in triple repetition; the placement of plots was systematic. The predecessor was bare fallow. The total area of the allotment made 500 m2. The soil samples were taken from the layers 0-10 and 10-20 cm: before treatment (background), and 7 and 37 days after treatment. The experiment used a hybrid of corn of F1 "Katerina SV". During growing season the dynamics of nitrogen-containing compounds was observed: alkaline hydrolyzed and ammonium nitrogen, as well as urease activity of the soil...