BIOMASS AND CARBON SEQUESTRATION ON STAND OF POPULUS NORTHEN IRAQ

We was divided the stand at three stratums depending on the density of the forest, from each strata take ten frequency. The sample area was (0.1) ha, on each sample, the diameter at breast height, total height, dry and wet weight of component tree measure was estimated carbon sequestration was estimated by drive allometric equation depending on variable of tree, to known the potential of biomass, we classified the sampling according to diameter class size (6.5-9.5), (9.6-12.5), (12.6-15.5) and (15.6-18.5)cm respectively. As result carbon sequestration found varied in different class in the density 20000 treeha , as (107.711, 481.916, 275.462, 219.975) tones/c/ha. A carbon sequestration potential correlated to diameter breast height. The tree size class at (he tree size class at (6.5-9.5) up to (9.6-12.5)cm had great potential in carbon sequestration from the small to medium diameter trees. While in size class (12.6-18.5) cm had lower potential to store carbon . in general old growth stand had more carbon sequestration than logged stand and secondary rotation. Each size class had a different carbon equation potential almost small up to medium size of trees had a greater potential for carbon storage, if compare with big trees because growth will slowly in digger trees.