Comparative Assessment of the Carbon-storage Potential of Grain-legum Agrocenosis Under Various Cultivation Technologies (based on Dndc Modeling)
Year: 2026
Type: article
Abstract: The aim of the study was to assess the potential for accumulation of organic carbon and transformation of greenhouse gas flows in agroecosystems with grain legumes (peas, chickpeas) under various cultivation technologies in the forest-steppe conditions of the Samara Trans-Volga region using simulation modeling in the DNDC environment. The object of the simulation was pea and chick-pea crops grown using traditional technology (with reservoir turnover) and No-till technology against the background of the use of mineral and organomineral fertilizers, as well as meliorant (phosphogypsum). The input parameters for the model were the climatic data of the Ust-Kinelskaya weather station, as well as the characteristics of the soil cover (density, pH, mechanical composition). The simulation results showed the high efficiency of the No-till technology. In comparison with traditional tillage, its use on pea crops has led to a 20% reduction in carbon dioxide emissions, 2.4-fold decrease in water evaporation from the soil, and the for-mation of a positive carbon balance (+742.9 kg/ha/year versus – 96.9 kg/ha/year). It contributed to a significant reduction in the contribution to global warming: the net global warming potential (GWP) was –1370 kg Co₂-eq./ha for No-till and +2522 kg Co₂-eq./ga for traditional technology. A negative GWP (about – 3700 kg co₂-eq./ha) was also observed for chickpeas, which indicates that there is no contribution to warming. Both crops contributed to the accumulation of nitrogen in the soil (an increase of 66-75 kg/ha). The analysis of carbon dynamics showed that the maximum accumulation in the roots of peas (709 kg/ha) is reached on the 202nd day of vegetation, and chickpeas (876 kg/ha) – on the 211st. The annual carbon accumulation in the soil for chickpeas was 1,312 kg/ha, which is significantly higher than for peas (743 kg/ha), winter wheat and corn. The use of No-till technology and inocu-lation of seeds with microbiological preparations are effective agrotechnological techniques for carbon deposition in the soil and reduction of greenhouse gas emissions.
Authors: N. M. Trots, O. V. Gorshkova
Language: English
Subfield: Soil Science
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W7214947642