Abstract: Based on an improved estimation method of forest carbon storage and the inventory of forest resources, this paper estimated the forest carbon storage and its dynamic changes in Tanjiang River basin, and analyzed the relationships of the carbon storage and its density with the increase of population density and GDP during the urbanization in 1990～2001. The results showed that the forest carbon storage in Tanjiang River basin increased from 5.906×10⁶ t in 1990 to 7.52×10⁶ t in 2001, with an annual average accumulation amount of 0.8×10⁶ t or an annual average accumulation rate of 3.05%, and playing a role of carbon sink. The rapid increase of population density and GDP didn’t influence the increase of forest carbon storage and density, but the development of forestry was far lower than that of economy. To have a better service function of forest ecosystem in the process of urbanization, and to promote the sustainable development of regional ecological environment, the key point is the reasonable coordination of forestry management with the development of economy.

Key words: Apple, Water use efficiency, Carboxylation efficiency, Soil water relative content, Waterlogging