Global amounts of carbon in forest ecosystems are 330 GtC in the forest biomass and 780 GtC in the soil after Dixson et al., 1994. Furthermore, uptake of carbon in net by forest ecosystem is regulated photosynthesis and respiration controlled by meteorological and ecophysiological characteristics of forest trees and understorey vegetation. Amount of carbon storage in the forest ecosystem classified into vegetation above ground, vegetation below ground, litter and woody debris, and also organic carbon in the soil. Forests and soils contain the largest stocks of organic matter globally, and organic carbon in the soil has a potential to release more CO2 by increasing soil respiration and to increase atmospheric high concentration of CO2 under the warm condition in the future. The trunk of tree is useful for timber and part of timber are reserved in the houses for long time. Plant growth can be stimulated by increased atmospheric CO2 concentrations and nutrient deposition (fertilization effects). However, in the field studies, the fertilization effect is not clear for forest ecosystems.