Carbon Density of Phyllostachys edulis Plantation Ecosystem in Typical Growth Area of Fujian Province

Taking Yong’an and Jianyang municipalities in Fujian Province as the typical research areas, the carbon density and its spatial distribution characteristics of Phyllostachys edulis plantation ecosystem were studied by estimating the biomass of P. edulis ecosystem through the field investigation. The results showed that the carbon density of P. edulis plantation ecosystem was 164750t/hm2 and its spatial distribution was in the order as soil layer> orbor layer > litter layer > shrub and herb layer. Among the four layers, the soil layer had the highest carbon density which accounted for 7576% of the total carbon density. The total carbon density of the litter layer and the soil layer was 3.18 times that of the aboveground (arbor layer, shrub layer and herb layer). The distribution of carbon density among the organs of P. edulis was ranked in the order of trunk > root > branches > underground trunk > leaves. Both of the organic carbon content and carbon density in the P. edulis plantation soil decreased with the soil depth. The carbon density in the 0-40cm soil layer accounted for 7533% of the total soil profile. In terms of P. edulis ecosystem as a whole, its carbon density was less than the average carbon density of different ecosystems in China, which suggested that there was much development space for carbon fixation capacity of P. edulis plantations.