Investigation of Soil Organic Carbon Changes and Validation of the Roth C Model to Estimate in Mountainous Areas

Subject Areas : rangland

Zeynab Eghbalian ¹ (Graduate MS.c Student - Nature Engineering -Faculty of Natural Resources and Enviroenment - Malayer University)
بهناز عطائیان ² (دانشکده منابع طبیعی و محیط زیست، دانشگاه ملایر)
Yahya Parvizi ³ (Agricultural Research, Education and Extension Organization, Soil Conservation and Watershed Research Institute, Tehran, Iran.)

Received: 2024-01-27 Accepted : 2024-06-23

Keywords: Organic Carbon, Carbon Sequestration, Accuracy, RothC, Sarfirozabad,

Abstract :

Soil organic carbon in terrestrial ecosystems is considered the most important component of the global carbon cycle, which plays a major role in controlling global warming challenges. In order to study soil organic C fluctuations, it is very important to use study models such as RothC. In the present study, in the Serfirouz Abad basin of Kermanshah province, for the extraction of carbon, the clay-block method and the ROTH C26-3 (ROTH) model were used to simulate the organic carbon changes in the soil. Finally, the accuracy of the modeling showed that the RMSE value for the target area is less than 0.11, and the MBI has reached 0.05, which makes the performance factor of the model - 0.96, and the high accuracy of the RothC model is emphasized. be placed Also, the highest component is assigned to HUM and the lowest component to DPM. The average amount of carbon stored in agriculture is about 52.72 tons per hectare and the average CO2 released is about 1.4 tons per hectare, which is about 65.2% of the amount of carbon stored this year in the form of CO2. It has come out of the ground. The average amount of carbon storage in rangeland is about 53.20 tons per hectare and the average CO2 is released is about 1.28 tons per hectare, which is about 2.40% of the amount of carbon stored this year. CO2 has been removed from the soil.