Abstract: The element analysis of annual rings shows the characteristic of the transfer and distribution of mineral elements in the stem, it may be useful to promote understanding the process of mineral cycling in the forest ecosystem. Analysing the elements in the annum ring and bark of “stem disk” of 28 aged pine tree, the significant negative correlation exists between the concentration of Ca, K, Mg, Na, Mn, and the age of annual rings. The significant positive correlation of the contents of P, Cu with the age of annum ring appears as well. The positive correlation exists between the contents of Ca, K, Mg, Na, P, Fe, Mn. Al, Zn, Cu, N in bark and the age of the stem bark. The mineral ash of inner bark is relatively high, it is 3.3-fold and 13-fold higher than that in bark and xylem respectively.

Key words: Pine, Stem, Element distribution