On KHILMI's theory of the dynamics of growing stock in forest stand

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  • ヒルミの林分蓄積動態論の検討
  • ヒルミ ノ リンブン チクセキ ドウタイロン ノ ケントウ

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Abstract

KHILMI's theory seems to be useful for forest yield predictions. In this paper this theory is examined from the viewpoint of its application in practice. The conclusions are as follows: (1) Two fundamental hypotheses in the theory are of sufficient reality based on ecological data of the forest. (2) The method of formulation used by KHILMI is essentially common in some other methods used in growth studies. (3) The theory also seems to be applicable to stands which were thinned and then have recovered to sufficient density. (4) In comparison with the calculation on coefficients by KHILMI, it seems better to use the method of least squares by DEMING. (5) KHILMI's formula is applied to the yield table for Sugi (Cryptomeria japonica D. DON) stands in the Akita region of Japan. The fit of the formula is good and the original hypotheses regarding parameters are well realized. However, before the formula is applied to other yield tables, many problems remain which will be discussed in subsequent papers.

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