Effects of plantation with conifers on Carbon sequestration (Case study: Zob-e-Ahan company, Isfahan)

The potential for carbon sequestration was evaluated for two coniferous species (Cupressus arizonica Green var. arizonica and Pinus eldarica Medw) in 17-18 year old plantations of Zob-e-Ahan industrial company near Isfahan. Transect sampling was conducted in each section، and five trees in each of the available 5 diameter classes were randomly selected and cut. Moreover، soil samples from 0 to 30 and 30 to 60 cm depth were collected in each part. Shoots and roots of the trees were separately collected and weighted. In addition، carbon sequestration of organs and soil was determined with an in-situ combustion method. Results showed that the rate of carbon sequestration was significantly different between two species (p<0. 01)، for which C. arizonica showed higher rate than P. eldarica. In addition، carbon sequestration showed significant difference (p<0. 01) amongst the tree parts (roots، woody organs and leaves)، where woody parts exhibited the highest carbon sequestration. Investigation of soil carbon storage showed no significant difference between soils in which two plantations were established.