摘要：To obtain estimates of carbon sequestered following afforestation, we studied the amount of soil carbon sequestration in two 15-year old stands of needle-leaved eldar pine ( Pinus eldarica Medw.) and broad-leaved black locust ( Robinia pseudoacacia L.) and a control area (without afforestation) in South of Tehran, Iran. For this purpose, sample plots (30x30 m) were randomly chosen in either site. In each plot, samples from depths of 0-15, 15-30 and 30-60 cm of four soil profiles were taken for investigations. In laboratory, Soil Organic Carbon (SOC) content of samples was determined by the Walkley-Black method. No significant difference in the amount of soil carbon sequestration of two stands was detected, but each stand sequestered higher carbon content in soil compared to that of in control area. In all soil samples, the highest carbon sequestration was observed in upper layer of soil. Likewise, values of growth and biomass of eldar pine trees were greater than those of black locust trees. It was concluded that there is a great potential of afforestation, in increasing of soil carbon sequestration.
