The intensity of decomposition of fiber on gray forest and chernozem soils using various systems of basic processing in the Northern Trans-Urals
The article presents the results of studies (2018 - 2020) on the study of the dynamics of the content of nitrate nitrogen, the intensity of fiber decomposition while minimizing the main tillage of soils located in the subtaiga and forest-steppe zones of the Northern Trans-Urals. The amount of nitrate nitrogen in the soil naturally increases in June on gray forest soils by 1.1 - 2.5 times, on leached chernozem - by 1.3 - 1.9 times. In the first month of exposure (June), favorable nitrogen and water regimes activated the soil biota to the maximum and contributed to the loss of fiber from the initial mass by 54 - 71 % during the processing of gray forest soils, and by 51 - 69 % of leached chernozem. It has been proven that the minimization of the main tillage helps to reduce the accumulation of nitrate nitrogen in the soil, which is due to the deterioration of aeration conditions, to which nitrifiers are especially sensitive.