Simulation of soil organic carbon dynamics in farmland in Huainan City based on CENTURY model
Farmland soil has been subject to long-term human intervention,and its carbon turnover in-tensity is greater than that of natural soil.Studying the spatiotemporal distribution of organic carbon in farmland soils is conducive to promoting the management of regional ecosystem carbon stock,which is of great significance for realizing the carbon peaking and carbon neutrality goals.This paper took the farmland ecosystem in Huainan City as the research object,and used the CENTURY model to simulate the variation trend of soil organic carbon density(SOCD)in the cultivated layer(0-20 cm)of farmland in Huainan City from 1961 to 2023.The results showed that the CENTURY model is appli-cable to the farmland ecosystem in Huainan City.The SOCD of farmland soils in Huainan City showed an increasing trend from 1961 to 2023,and the average value of SOCD in 2023 was 3.16 kg/m2,with the strongest accumulation of slow soil organic carbon and the weakest accumulation of active soil organic carbon.The spatial distribution pattern of SOCD was high in the northeast and south-central parts of the city,and low in the northwest.Air temperature,precipitation,pH value,bulk density and farmland management all had an effect on soil organic carbon accumulation.The study showed that farmland soils in Huainan City have good carbon storage capacity.
万方数据
维普
