Soil nitrogen conversion features while minimizing chernozem processing in the Krasnoyarsk forest-steppe

The purpose of research is to reveal the effect of minimizing tillage on the nature of the transformation of the fractional composition of easily hydrolysable nitrogen compounds. The studies were carried out on the basis of the production experience of OOO OPH Dary Malinovki, Sukhobuzimsky District in the Krasnoyarsk forest-steppe. The object of research is ordinary chernozem, medium-humus, medium-thick, heavy loamy on red-brown clay. Three times during the growing season, soil samples were taken from layers 0-10, 10-20 cm using the snake method. The experiment scheme is represented by the following options: 1. Moldboard plowing (st). 2. Minimal processing (disking). 3. Flat cutting processing (cultivation). In the 2017 season, the soil of the experimental variants was cultivated according to the type of pure early fallow, and in 2018, spring wheat of the Novosibirskaya-31 variety was sown at the field station, and barley of the Acha variety was sown in 2019. Observations of the dynamics of easily hydrolysable nitrogen compounds with different processing methods revealed significant differences. Under the conditions of moldboard plowing, the absence of significant differences between the assessed soil layers was revealed. The change of the plow to disk and flat-cutting tools led to the differentiation of the arable layer according to the content of Nlg. The use of different methods of basic tillage caused uneven mobilization of nitrogen-containing compounds and provided approximately similar values of nitrogen-mineralizing capacity. The absence of dependence of nitrate accumulation on the methods of tillage in the first months of the transition to non-moldboard loosening was revealed. Against the background of the vegetation of spring wheat, significant differences were observed in the above-seed layers, and during the period of growth and development of barley, changes were found in the entire arable layer. During the growing season of grain crops, statistically more significant concentrations of ammonium nitrogen compounds were concentrated in the under-seed layer (10-20 cm) compared to the above-seed layer.