Estimate of net CO₂ sequestration in a revegetation slope dominated by Alnus sieboldiana Matsum.

Abstract

We estimated the CO₂ sequestration in plant biomass —especially that in the stem, branch, root, litter, and growth base— in a revegetation slope dominated by Alnus sieboldiana Matsum. The results indicate that the CO₂ sequestrations in those parts in an area of 1 m² are 21.0 kg, 4.2 kg, 5.5 kg, 1.7 kg, and 8.8 kg, respectively. Furthermore, we estimated the net cumulative CO₂ sequestration (CCS) in a revegetation slope including CO₂ emission from construction work between the two cases. One involves a combination of a lath netting work (LNW) and a material spraying work (MSW) and the other involves two different combinations of a LNW, two slope-crib works, and a MSW. The results indicate that 30 years after seeding, the net CCS of the former is 80.6 kg CO₂ m^-2 while the net CCSs of two combinations in the latter are 11.3 and 0.3 kg CO₂ m^-2, respectively.