Effects of successive planting on carbon storage of Chinese fir forest

The effect of successive planting on the carbon content, carbon storage and annual net carbon fixation of Chinese fir with diffe rent ages were measured.The results show that the carbon content is not influen ced significantly by the planting generation,and the carbon contents of the orga ns in the same generation and age are in the sequence as following:bark＞leaf＞s tem＞root＞branch. Whereas there are significant differences of carbon storage and annual net fixation among different generation stands, which decrease with the increment of planting generation. The maximum differences of carbon storage and annual net carbon fixation are those of the middle-aged stand.Compared with the first generation of the middle-aged stand, the second generat ion stand and the third generation stand own decreased carbon storage,which are l ower by 16.98% and 63.60%,respectively,and annual net carbon fixation which are lower by 14.01% and 25.14%.