Abstract:

In accordance with the characteristics of species diversity and the complicacy of tree species composition in evergreen broad - leaved forests, a ten - years' study on the evolving pattern of tree species composition, number and volume proportion in stands and their interrelation was carried on by means of the division and mergence of tree species growth types of main forest types. The results indicate that (1) the tree species composition in stands can be divided into three kinds, i. e. main fast growing species, main slow growing species and secondary (associated) species; (2) The number proportion (N%) and age (A) of main fast growing species assume linear ralation, N% and A of main slow growing species assume hyperbolical relation and this relation is mutually close; N% and A of decondary species assume quadratic parabolical relation and that is mutually close, too. (3) For the three kinds of tree species, the evolving pattern of the volume proportion (V%) is similar to that of N% with the increase of A, but for the main fast growing species the pattern of V% is larger than that of N% and for the rest two kinds the pattern of V% is smaller than that of N%; and (4) there is linear ralation between V% and N% for the three kinds of tree species, the productivity of the main fast growing species is higher than the others.

Key words: Evergreen broad-leaved forests, Tree species growth types, Tree species composition, Number proportion, Volume proportion