Reaction of organic matter of agrochernozems and carbon cycle enzymes to the introduction process of waste-free processing systems

The purpose of research is to assess the impact of the transition to minimal soil tillage technologies on the transformation of organic matter and the participation of carbon cycle enzymes in these transformations. Research was carried out on the production experience of Dary Malinovka Production Enterprise LLC in the Sukhobuzimo District in the Krasnoyarsk forest-steppe. The object of research is ordinary chernozem with medium humus and medium thickness. heavy loamy on red-brown clay. The experimental design is represented by the following options: 1. Dump (st); 2. Minimum (disk); 3. Flat cutting (cultivation). In the 2017 season, the soil of the experimental variants was cultivated using the type of pure early fallow, and in 2018, spring wheat of the Novosibirskaya-31 variety was sown at the field station, and in 2019, barley of the Acha variety was sown. The results of polyphenol oxidase activity showed a very weak level. It was shown that peroxidase activity responded to a greater extent to mechanical stress relative to polyphenol oxidase. The activity of peroxidase differed in a statistically significant increase in the layer of 0-10 cm relative to 10-20 cm during dump treatment. The use of surface loosening significantly increased the activity in the layer of 10-20 cm compared to 0-10 cm. Data on the activity of the analyzed enzymes indicate favorable conditions for the humification of plant material and the accumulation of humus-like substances. Data from the conditional coefficient of humus accumulation show that during the tillering phase of spring grain crops, conditions developed that were not favorable to the processes of new formation of easily mineralizable humic substances in the soil of all experimental variants. The positive dynamics of the coefficient was most pronounced during flat-cut loosening in a layer of 0-10 cm.