Abstract: A precise estimation of vegetation carbon storage is the key of illustrating the effects of vegetative restoration on the carbon balance in terrestrial ecosystem. In common, this carbon storage is estimated by carbon concentration coefficient and biomass. This paper collected the actual data of various plants carbon concentration, and analyzed the characteristics of the carbon concentration in different plant life types, plant tissues, and different areas. The results showed that plant carbon concentration was in the range of 24.95%-55.44%, with an average of (43.63±0.14) %. The average carbon concentration of different life types was arbor (46.22%)＞shrub (45.93%)＞bryophyte (41.64%)＞herbage (37.13%), and that of different tissues was flower (48.52%)＞fruit (47.19%)＞branch (45.42%)＞stem (44.48%)＞leaf (43.36%)＞root (42.88%). As for different geographical areas, the average carbon concentration was high latitude area (50.30%)＞low latitude area (45.30%)＞middle latitude area (39.68%), and there were significant differences among different climatic types. As a result, error always existed when fixed coefficients were used to estimate the carbon storage.

Key words: Wet deposition, Red tide, Changjiang River estuary, Nutrient element