Abstract:To provide a scientific basis for the sustainable management of plantations, continuously determined basic data of 25 years on the characteristics of Chinese fir plantation, including information on nutrient transfer before branches and leaves wither, were studied, and the changes in nutrient transfer with forest age were discussed. The results showed that the annual average amount of nutrients transferred before the branches and leaves withered was 3.22 to 31.89 kg hm-2 yr-1, among which, the leaves accounted for 71.31% to 94.41% and branches for 5.59% to 28.69%. The amount of nutrient transfer in the branches increased with increasing forest age. Before 20 years of forest age, nutrient transfer rate of the leaves increased, and thereafter, it decreased. The nutrient transfer rate of the branches was 20.97% to 22.59%, and that of the leaves was 22.98% to 26.06%, and these increased with increasing forest age. There was no significant difference detected in nutrient resorption rate among the branches in different age groups and leaves older than 7 years (P > 0.05), except in plantations 1 to 7 years old (P < 0.05). Among the elements transferred, N and K accounted for 83.75% to 84.25%, and P, Ca, and Mg accounted for 15.75% to 16.25%. The transfer rates of N, P, K, Ca, and Mg were 24.59% to 34.53%, 36.36% to 46.64%, 42.86% to 51.27%, 3.68% to 7.35%, and 3.67% to 9.56%, respectively. The nutrient resorption rate was mainly controlled by the nutrient concentration differences between before and after leaf litter fall and nutrient concentration before leaf and branch abscission. However, the amount of nutrient translocation is not only affected by differences in nutrient concentration before and after litter fall, but also depends on the amount of litter fall and the growth status of Chinese fir plantations.