Estimation method of wood carbon storage at sacle of forest farm management unit.

In order to get the carbon storage information of tropical forest, a systematic sampling method was used to get scientific data of plantation in Daodong Forest Farm of Hainan Island, Southern China. Combining the IPCC method and sampling data on forest resource, information about the above and underground wood carbon storages were caculated. The results showed that the managemet unit of Daodong Forest Farm had huge carbon storage, which reached 0.53 million ton, but carbon storge per unit area was unsufficient at only a level of 54.5 t/ hm2. The carbon storage of unit area in different forest types varied with different species and different age groups, and the mature forest of Casuarina equisetifolia occupied the highest carbon storage in unit area (141.8 t/ hm2 ). The study results indicated that current forest management model of short rotation clear-utting system caused the decline of biomiss and carbon storage, and this could not meet the needs of increasing forest biomass to mitigate climate change. In order to change this situation, smooth transfering of clear-utting model into a multi-functional forest management is suggested.