ASSESSMENT OF THE IMPACT OF THE ANNUAL USE OF TURKEY MANURE ON THE NUTRIENT RESERVES IN THE SOIL AND THE YIELD OF SPRING WHEAT

Abstract

As a result of field studies conducted at the experimental field of the Penza State Agrarian University (Russia, Penza region, Mokshansky district), it was revealed that with the annual introduction of different doses of turkey manure, an increase in the content of alkaline hydrolyzable nitrogen in the soil is observed, although by the end of the growing season its content decreases, which is associated with the consumption of its mineral compounds kul-tours. Doses of manure from 12 to 36 t/ha increased the content of alkaline hydrolyzable nitrogen in the soil from 26.6-29.9 mg/kg at a dose of 12 t/ha to 40.0-53.9 mg/kg of soil at a dose of 36 t/ha. Repeated application of the studied doses of the drug led to an increase in the content of mobile phosphorus compared with the control from 49.0-55.5 mg/kg on the variant with a dose of 12 t/ha to 175.0-193.0 mg/kg at a dose of 36 t/ha. The content of mobile potassium in this case increased from 32.7-63.1 mg/ kg at a dose of 12 t/ha to 133.9-150.6 mg/ kg at a dose of 36 t/ha. With a single application of turkey manure for spring wheat, the dose of 36 t/ha was the most effective in terms of productivity, although there is a decrease in its payback. With double application, the dose of 12 t/ha was the most effective. A further increase in the dose of manure leads not only to a decrease in crop productivity, but also to the accumulation of excessive amounts of nutrients in the soil.