Article

The phytomass of leaves, branches and trunk of four trees of Pinus peuce was measured (that of leaves and branches., separately for each of three crown segments), and phytomass energy values were established. One tree grew isolated in the zone transitional between conifer belt and subalpine belt, the others were members of a stand in the conifer belt. Comparison of phytomass distribution in age classes supports the assumption that P. peuce is a stable and vigorous component of the upper forest belt of Mt Pirin, and has the potential of expanding its present stands upward into the transitional zone.