The influence of inter-row cultivation of maize on the dynamics of nitrate nitrogen leached chernozem in the conditionsof forest steppe zone of Trans-Urals

The study presents the results of three years of research on the nitrogen regime of leached chernozem under corn in the conditions of forest-steppe zone of the Trans-Urals. The aim of the study was to determine the effect of row-to-row processing on the nitrogen accumulation of current nitrification and the dynamics of nitrate nitrogen of leached chernozem in corn crops. The scheme of the experiment provided for the introduction of mineral fertilizers based on the planned yield of 4.0 to 6.0 t/hectare of grain. The effect of row-to-row treatment on nutritional regime was studied. It was found that row-to-row processing i creased the content of nitrate nitrogen by 15-26 %. Application of mineral fertilizers provided an increase in the content of nitrate nitrogen in the soil to 26.9-34.9 mg/kg, while in the control - 9.4 mg/kg. The introduction of increasing doses of mineral fertilizers reduced the effect of row-to-row treatments - deviations in the content of nitrates in the soil were insignificant. It was proved that row-to-row processing significantly increased the total nitrogen content in grain and vegetative mass by 2-19 % when growing corn on a natural agricultural background. When applying fertilizers to the planned grain yield of 5.0 t / hectare or higher, the total nitrogen content in the grain and vegetative mass in the variants with row-to-row tillage did not differ significantly. Farm nitrogen removal by maize grown without fertilizers on leached chernozem made 143 kg/hectare. Row-to-row processing increased this figure to 152 kg/hectare. With the increase in the level of mineral nutrition, farm take-out increased to 244 kg/hectare. Single row spacing cultivation improved nutrient intake and increases farm nitrogen removal by 6-18 %. Positive effect of inter-row processing was noted by the accumulation of nitrogen in the current nitrification, the content of which increased from 104-118 to 125-141 kg/hectare.