Abstract:

The aim is to study the effects of fire disturbance on the content of organic carbon and carbon storage of soil in Taiga forest. In this study, soil organic carbon contents in different soil layers (0-10 cm, 10-25 cm) under different fire disturbance intensities in the same fire time of Taiga forest were calculated, and the soil carbon storage was evaluated. The significance of difference was analyzed by the unary variance and LSD multiple. The results showed that the organic carbon and carbon storage in the upper layer (0-10 cm) soil were all greater than those in the lower layer (10-25 cm) soil under the same fire disturbance intensity. The carbon storage in the upper layer (0-10 cm) soil showed: unburned > slight fire > moderate fire > severe fire and that in the lower layer (10-25 cm) soil showed: slight fire > moderate fire > unburned > severe fire. The loss of soil organic carbon content and carbon storage in 0-10 cm soil layer and the organic carbon content in 10-25 cm soil layer increase with the increase of fire disturbance intensity. Carbon storage in the 10-25 cm layer increases after slight and moderate fire disturbance.

Key words: fire disturbance, different intensities, organic carbon content, carbon storage, Taiga