A Mathematical Mode of Expression of Connections Between Relative Heights (hr=h/hg) and Diameters (dr=d/dg) in Even-Aged Stands

1988

S. 19-24

2 Tab., 7 Lit. Ang.

Unselbständiges Werk

200065334

Starting from the principle of unity and indivisibility of a stand structure in this paper the correlation between trees distribution on diameters categories and their distribution on height classes is analysed, obtaining in synthesis the results from table 2. Analysis of the results obtained shows that for even-aged stands of the same species and medium diameter, on the same relative diameters categories, the relative hr heights are almost the same. It is ascertained that as tree medium diameter increases, heights curve not only moves up and on the right, but also changes its slope, becoming more and more flattened, as the stand is passing from an inferior development phase to another superior. With regard to analytical report the relations (7) and (8) were established and incorporated in regression functions (9) and (10) by means of which the structure corves at different stands ages can be reconstituted, coming through state curves to be defined to the development curve for each stand. The determined equations contribute to the elaboration of dynamic model of even-aged stands.