Сirculation of carbon oxide depending on the energy efficiency of agriculture – regional aspect

Abstract

Aim. To establish the relationship between energy efficiency of crop production with the balance of carbon monoxide during the period of increasing manure application (1956–1995) and its replacement by by-products as organic fertilizer and to develop a model of carbon monoxide and agrocenosis depending on energy costs in agriculture. AIC of Cherkasy region in the period from 1956 to 2020. Methods. Information-analytical, mathematical-statistical (correlation-regression, factor, method of nonparametric statistics). Results. The increase in energy efficiency in agriculture of the region's agro-industrial complex is associated with a decrease in the formation of humus from organic fertilizers, when the increase in Kee per unit was accompanied by a decrease in humus production of 0.16 million tons and accompanied by an increase in mineralization (Kee per unit was 2.42 million. tons of C-CO2 mineralization). During the period of manure application and supplementation with crop and root residues, the ratio of С-СО2, which passed from manure and crop residues to humus was in the range of 0.7–1.2 to 1, but due to the higher level of humification coefficients of crop and root residues mineralization of manure is a more intense source of C-CO2 emissions compared to the mineralization of crop and root residues, which are a stock factor of C-CO2. With the complete replacement of manure by side phytomass as an organic fertilizer, the emission of C-CO2 from the mineralization of its excess remains lower on average by 2.27 times compared to the period of manure application. Conclusions. With the growth of Kee, the level of mineral processes increases and the sequestration capacity of С-СО2 decreases (according to Ib humus and agrocenosis), agricultural productivity increases, but the fertility of agricultural lands decreases, which is typical for the period of manure application. When manure is replaced by by-products, the Kee, the level of mineralization processes and the increase of sequestration capacity of С-СО2 humus and agrocenosis decrease, which provides conditions for the formation of land fertility against the background of reduced agricultural productivity.