Abstract:
128 trees of
Pinus kesiya var.
langbianensis were taken from the natural forests in Pu'er city of Yunnan Province as samples, the mingling (
M), uniform angle index (
W) and neighborhood comparison (
U) were selected to describe the spatial structures quantitatively. The spatial structure indices for different components, and the relationship between the indices and the different components of above-ground biomass and their allocation proportions were analyzed using co-variance analysis and variance analysis. The results showed that: ①
P.
kesiya var.
langbianensis is the single dominant tree species in the natural forests, it tends to an even spatial distribution, and the mixed patterns are from weak to moderate mixed. ② With the increase of the neighborhood comparison (
U), the above-ground biomass value decreases, and the biomass proportion of wood decreases by the increasing biomass of bark, branches and needles. ③ For the relationship between above-ground biomass and the mingling (
M), the biomass of all components reaches the maximum as the mingling (
M) being 0.75, and the proportion of wood biomass takes up the highest value. ④ The effect of spatial distribution pattern on aboveground biomass and their allocation are not significant.