Estimating Sunny Crown Length using Stand Density, Total Height, and Height Increment in Even-Aged Closed Hinoki Cypress Stands

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概要

• 論文の詳細を見る

• Estimating the sunny crown volume or surface area requires the sunny crown length, as well as the crown profile defined as a change in crown radius from the tree apex toward the ground, because sunny crown volume or surface area can be obtained by rotating the crown profile from the apex to the base of the sunny crown. In this study, we presented a model to estimate sunny crown length in even-aged closed hinoki cypress (Chamaecyparis obtusa ENDL.) stands. The model requires only three attributes: stand density, total height, and height increment of individual trees. To evaluate the model, it was applied to a 36-year-old hinoki cypress stand in which three plots of various stand density were established. The model provided accurate and precise sunny crown length estimates. Combining the model with a total height growth model allows us to estimate sunny crown length because stand density is generally a known variable.

• 森林計画学会の論文

著者

• Waguchi Yoshiaki

  Nara Forest Res. Inst. Nara Jpn

• Ueda Masafumi

  Laboratory of Forest Ecology, Graduate School of Agriculture, Kyoto Prefectural University

• Ueda Masafumi

  Laboratory Of Forest Ecology Graduate School Of Agriculture Kyoto Prefectural University

関連論文

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• Accuracy and precision of crown profile, volume, and surface area measurements of 29-year-old Japanese cypress trees using a Spiegel relascope
• Error in Stem Volume Estimation using Tree Height and Several Upper-Stem Diameters of Standing Tree Measured with a Spiegel Relascope and Wheeler Pentaprism Caliper : In a 29-year-old Stand of Japanese Cypress (Chamaecyparis obtusa ENDL.)
• A Model for Predicting the Vertical Distribution of Cross-sectional Area Increments in Hinoki Cypress Stems
• Increase in Stem Volume per Unit Sunny Crown Dimension for Even-Aged Hinoki Cypress (Chamaecyparis obtusa) Stands
• Relationship between Sunny Crown Volume Increment and Stem Cross-Sectional Area Increment at Sunny Crown Base for Hinoki Cypress, and its Application
• Estimating Sunny Crown Length using Stand Density, Total Height, and Height Increment in Even-Aged Closed Hinoki Cypress Stands
• Vertical Distribution of the Stem Cross-sectional Area Increment in Even-aged Stands of Hinoki Cypress
• A Sunny Crown Profile Equation for Hinoki Cypress based on the Height Increment

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