Changes in soil fertility and productivity of agricultural crops under the aftereffect of urban sewage sludge and zeolite

The current research deals with the influence of the aftereffect of zeolite-containing agro-ore, sewage sludge from the city of Penza and their combinations on the total carbon content, agronomically valuable water-resistant aggregates in the arable layer, the efficiency of moisture use by plants and the productivity of agricultural crops. It was determined that the highest effect on meadow-chernozemic low-humus medium-thick leached soil in this case was provided by the aftereffect of increased rates of precipitation of urban wastewater (160-180 t/ha) in combination with zeolite-containing agro-ore. The content of total carbon in the arable layer in these variants of the experiment in the agrocenosis of winter wheat (2020) was 3.109-3.121%, significantly exceeding the initial values by 0.157-0.169%. The number of agronomically valuable water-resistant aggregates in the arable layer under observed conditions was equal to 59.6-60.5% at the end of the research, exceeding the initial values by 21.0-22.0%. The water consumption coefficient in the oat agrocenosis was 544.7-547.2 m 3 /t, in the pea agrocenosis 683.8-686.9 m 3 /t, in the winter wheat agrocenosis 558.1-560.8 m 3 /t, exceeded the control in 2018 by 162.2-164.7 m 3 /t, in 2019 by 260.7-263.8 m 3 /t, in 2020 by 141.7-144.4 m 3 /t. The total productivity of Konkur oats, Jackpot peas, Moskovskaya 56 winter wheat variety under the aftereffect of urban wastewater precipitation at rates of 160 and 180 t/ha was 12.83-12.91 t/ha per unit, exceeding the control by 3.64-3.72 t/ha per unit, or 39.6-40.5%.