Intensity of CO<sub>2</sub> emissions from the soils of Polissya during the crop vegetation and dominancy of its conditioning factors
The paper presents the results of studies on the intensity of CO2 emissions from soils of different granulometric composition and degree of hydromorphy of Polissya of Ukraine during vegetation of crops and the dominance of its determinants. The average values for the period of observations of CO2 emissions from soils, kg / ha / h were determined: peaty-marsh carbonate drained, 14.3> chernozem-meadow carbonate sulfur-lime-sugary, 9.8 > light gray podzolic gleyic sandy, 8.9 > gray podzolized gleyic loamy, 8,8 > dark gray podzolized glutinous loamy, 8,2> sod-medium podzolic gleyic sandy loam, 6,9 > sod-medium podzolic gleyic loamy, 6,3. It was revealed that the volumes of CO2 emissions from soils depend on the type of soil, its characteristics and the complex influence of abiotic factors. The coefficients of the pair correlation (r) between the mean values of the emission intensity in the studied soils and the values: fine dust (particles 0.005-0.001, mm), carbon of organic matter, alkaline hydrolyzed nitrogen, temperature of the earth's surface and humidity, respectively, are 0.90, 0.92, 0.90, -0.93, 0.86. It has been proved that the value of ECO2 in soils is 94.7% due to the joint effect of several factors, including: the content of fine dust (43.7%), carbon content of organic matter (24.0%), humidity (20.0%) and the temperature of the earth's surface (7.0%).