Abstract:

The Self-thinning equation of even aged pure stands, that was proposed by one of the authors, was tested. The equation is Testing result showed that the processes of self-thinning was properly described by the equation where δ, in the equations, was determined by a initial state of a stand. β denoted Reineke's self-thinning coefficient. S_f was the maxmum density index, γ was self-thinning power. F-test was emploied. The results show that maxmum density index of stand was close to a constant for a certain species but independent from site, region where stand located, stand age and initial state of the stand. The value of δ was also independent from site, region, age and initial states, but a bigger sampling error could exist.

Key words: Self-thinning, Density