CARBON DIOXIDE EMISSION RATE DEPENDING ON THE INTENSITY OF ARABLE LAND USE ON CHERNOZEM SOILS OF THE TESTING GROUND “AGROLANDSCAPE”

Abstract

The study of the features of carbon dioxide emission in agrolandscapes is of great ecological importance for the development of agricultural technologies that reduce its release into the atmosphere and prevent negative climate changes – aridization, extreme precipitation, etc. Due to the lack of data on CO₂ emissions in agricultural chernozems of the Central Ciscaucasia at the testing ground of the FSBSI “North Caucasus Federal Agricultural Research Centre”, studies were carried out. The purpose was to compare the intensity of CO₂ production in crops of winter wheat – the leading crop in the Stavropol Territory, which covers an area of about 1,8 million hectares and fallow land. It was found that, on average, over two years (2023-2024), the intensity of CO₂ production differed little in relief, both in winter wheat crops and in the fallow land. However, the release of carbon dioxide was more active in winter wheat crops. On average, over two years, CO₂ emission in the fallow land at the beginning of July was 18 (the upper part of the slope – taxon A₂) – 27 kg/ha (the edge of the flat interfluve – taxon A₁) or 15,4 – 22,7% less than in winter wheat crops. In addition, the intensity of carbon dioxide production depends on weather conditions. In a wetter 2023, there was a more active release of CO₂ from the soil. On average, it was higher for the testing ground than in drier conditions in 2024 in winter wheat crops by 31 kg/ha per day or 30,1%, the fallow land – by 28 kg/ha per day or 33,7%.