The effect and aftereffect of bird manure on the agrochemical properties of leached chernozem and productivity of agricultural crops

Abstract

The article presents the results of field studies of the effect of different doses of chicken manure on the agrochemical properties of leached chernozem and crop yields of the crop rotation link, carried out in the training and production center of the Penza State Agrarian University in 2017–2019. Studies have shown that the use of different doses of manure in direct action led to an increase in the content of mobile forms of nitrogen, phosphorus and potassium in the soil. In the aftereffect, in the second and third years, there is a decrease in their content to the level of the initial values. The pH_sol indicator in direct action increased by 0.06–0.16 units. In the second and third years, a decrease in the pHsol was observed up to the level of the original values. The total increase in grain yield of cultivated crops in experiments from the direct action and aftereffect of the introduced doses of manure from 2 to 10 t/ha was 0.46–2.76 t/ha of grain units compared to control. The highest total productivity was at a manuredose of 10 t/ha. The payback of 1 ton of manure for three years of operation was 229.5– 309.5 kg/t. The highest payback was noted at doses from 4 to 8 t/ha.