Can the Relative Stem Taper Curve be Estimated Theoretically only from Tree Height and Diameter at Breast Height?

• Inoue Akio

  Faculty of Agriculture, Tottori University

抄録

I tested whether or not BEHRE'S and KUNZE'S relative stem taper curves in coniferous species can be estimated theoretically only from tree height and diameter at breast height through a theoretical two-way volume equation, and compared the accuracy and precision of the estimated taper curves. The estimation procedure was fitted to 50 Cryptomeria japonica D. DON and 50 Chamaecyparis obtusa ENDL. trees. The estimated BEHRE'S relative stem taper curve showed higher accuracy and precision than KUNZE'S. In BEHRE'S relative stem taper curve, the mean relative errors of estimated diameter were less than ±3.2% for C. japonica and ±11.8% for C. obtusa, except on the upper stem near the tip. The standard errors of estimated diameter ranged from 0.7cm to 1.2cm for C. japonica and from 0.5cm to 1.9cm for C. obtusa. In conclusion, BEHRE'S relative stem taper curve can be well estimated theoretically only from tree height and diameter at breast height, except on the upper stem near the tip.

収録刊行物

• Journal of Forest Planning

  Journal of Forest Planning 7 (2), 89-94, 2001

  森林計画学会

キーワード

• BEHRE'S relative stem taper curve
• coniferous species
• KUNZE'S relative stem taper curve
• normal form-factor
• theoretical two-way volume equation

詳細情報

• CRID: 1390282679415952896
• NII論文ID: 110009357650
• NII書誌ID: AA11059168
• DOI: 10.20659/jfp.7.2_89
• ISSN: 21898316
• ISSN: 1341562X
• Web Site: https://www.jstage.jst.go.jp/article/jfp/7/2/7_KJ00007911222/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可