SOIL RESPIRATION INTENSITY OF THE LEFT-BANK POLISSYA UNDER THE CONDITIONS OF AGROCENOSIS

Abstract

The problems related to determining soil respiration intensity (SRI) of the Left-bank Polissya of Ukraine, as well as to establishing the regularities of the formation and stipulation of emission losses of organic carbon by soils under the conditions of the agrocenosis are presented. The original technique used in the paper makes it possible to not only determine the values of CО₂ emission from soils, but to calculate the values of errors that appear in the process of measurements. The research results prove that in 2013 the values of SRI from the basic soils of the Left-bank Polissya of Ukraine varied considerably depending on the soil type, land type, farm crop and respiration intensity. It has been revealed that in the period of the investigation SRI in the soddy mid-podzolic gley sandy soil on the ancient alluvium amounted to 1,130+0,633 kg/ha/h, whereas in the peaty bog well-degraded soil on the recent alluvium it amounted to 13,955+1,318 kg/ha/h. It has been established that in 2014 under the conditions of moisture deficiency the range of SRI values in the above soil types narrowed down considerably, thus amounting to 2,78+0,35 and 6,76+0,58 kg/ha/h respectively. It has been revealed that an integrated error which proves most significant as to its value appears due to the imperfection of the device and the equipment, as well as due to ΔCО₂ value (the difference between the finite and the initial concentration in the chamber). The total value of the errors ranges from 60,6 to 93,4% of the error total value.