INFLUENCE OF TEMPERATURE CONDITIONS ON THE EFFICIENCY OF CO2 CAPTURE FROM ATMOSPHERE AND ITS FIXATION IN THE BIOMASS OF PEAS(Pisumsativum)

Abstract

The negative consequences of global climate change are widely known, in particular leading to a decrease in soil fertility and a decrease in the efficiency of crop production. In connection with the above, approaches to greening agriculture are constantly being developed, which should lead to improved soil quality, preservation and increase in the amount of nutrients in it, as well as a reduction in greenhouse gas emissions. One of these approaches may be the use of peas as ground cover plants to reduce CO2 emissions from bulk soil, due to the fixation of C in phytomass, which will later be plowed into the soil. To evaluate the effectiveness of this approach, a vegetation experiment was conducted in a greenhouse under different temperature conditions (20°C, 25°C, 30°C) with soil on which pea plants (Pisumsativum) were grown and soil without plants (imitation of open arable land) . In the dynamics of the experiment, indicators characterizing the process of carbon accumulation in phytomass were assessed, namely the rate of increase in plant phytomass and chlorophyll content in leaves, as well as the process characterizing CO2 emission from the soil - an increase in the intensity of soil basal respiratory activity under peas over that of bulk soil. Next, the carbon balance was calculated for each temperature regime. It was shown that with an increase in temperature from 20°C to 30°C, there is a decrease in C fixation in plant phytomass and a decrease in CO2 emission due to the respiratory activity of the soil microbial community. The maximum fixation of C when growing peas (Pisumsativum) was established for a temperature regime of 20°C and amounted to 585 kg C/ha.