Study On Variation Characteristics Of Stand Structure And Carbon Storage In The Early Stages Of New Moso Bamboo Stands

Due to its wide distribution in southern China, strong carbon sequestration ability and high economic value, Moso Bamboo is an important carbon species. To determine a rule for interannual variation characteristics of carbon sequestration in new moso bamboo (Phyllostachys edulis) stands based on carbon sink (1-5 a). An 80 m×100 m fixed plot was established at a long-term, afforestation, fixed observation research site for carbon sequestration. Linear regression and correlation were used forme analysis. Results showed that,(1)In the young stand, stand density (N) increased with stand year (y) with a fitted regression equation of:N=17.214y2+309.21y-217.4, y∈1-5, R2= 0.9811. The allometric equation for mean DBH and stand year (y) fitted with linear regression was D= 0.0157y2+ 0.7279y+1.598, y∈1-5, R2= 0.7565. The linear regression for the relationship between culm height (H) and stand year (y) was projected to be H= 0.1085y2+0.4299y+2.1553, y∈1-5, R2= 0.7232. Therefore, in the young moso bamboo stand, stand density, DBH, and culm height all had a positive relationship with age.(2) In the young moso bamboo stand, the ratio of single moso bamboo moisture content, carbon content and bamboo organic carbon content of each section, fitting the rule of culms> branches> leaves. With the increase of stand year after afforestation, moisture content of each section showed a trend of increase, the organic carbon content showed a trend of decrease, the aboveground biomass and carbon storage all showed a trend of increasing.(3) In the young stand, aboveground biomass (B) and mean DBH fitted with linear regression was B=2.04×10-1xD161, R=0.901. The aboveground biomass (B) increased with stand year (y) with a fitted regression equation of:B=0.0168y2+0.5268y+0.3645, y∈-5, R2=0.9682. The aboveground carbon storage (C) and mean DBH were positively related, the fitting equation was: C=0.1011D15291. The linear regression for the relationship between aboveground carbon storage (C) and stand year (y) was projected to be C=0.0024y2+0.2477y+0.179, y ∈1-5, R2=0.7275.(4) Slope degree and slope aspect play an important role in new moso bamboo stand, but interactions with each factor are not significant. With the increase of slope degree, the stand density, mean DBH, mean culm all showed a trend of decrease. The mean DBH and mean culms height effect by slope aspect is half shady slope) shady slope> sunny slope. The stand density, mean DBH and mean culms height of new moso bamboo effect by slope degree and slope aspect is irrelevant to stand year.