第136回日本森林学会大会 発表検索
講演詳細
防災・水文部門[Forest Disaster Prevention and Hydrology]
| 日付 | 2025年3月22日 |
|---|---|
| 開始時刻 | ポスター発表 |
| 会場名 | 学術交流会館（ロビー） |
| 講演番号 | PJ-50 （学生ポスター賞審査対象） |
| 発表題目 | Calibration of Sap Flow Measurement Using Azimuthal Data in Japanese Cypress Calibration of Sap Flow Measurement Using Azimuthal Data in Japanese Cypress |
| 所属 | 名古屋大学 |
| 要旨本文 | We developed a calibration equation for TDM using azimuthal measurements. Three sample stems of 38 to 42-year-old Japanese cypress (Chamaecyparis obtusa) were selected from the Akatsu Research Forest at the University of Tokyo. The tree heights ranged from 16.3 to 18.6 meters with DBH ranged from 18.5 to 21.5 cm. We applied negative pressures ranging from 450 to 750 Pa and measured sap flow velocity using 2 cm probes from four directions. A new pair of coefficients using only the south probe was α = 0.028 and β = 0.988, with an R2 of 93.7%. The mean coefficients using four probes were α = 0.029 (SD: 2.63) and β = 1.065 (SD: 2.98). Differences of coefficients at four direction possibly associated with leaf-branch connections around the trunk. The estimated mean transpiration using the new coefficients was 11.2 L/day, while the estimated mean transpiration using the old coefficients was 4.5 L/day (SD: 0.75). |
| 著者氏名 | ○Xinwei Wang1 ・ Takashi GOMI1 ・ Ayumi Kotani1 ・ ChenWei Chiu2 |
| 著者所属 | 1Graduate School of Bioagricultural Sciences, Nagoya University ・ 2Ecohydrology Research Institute, The University of Tokyo |
| キーワード | Transpiration, Sapflow Measurement, Japanese Cypress, Laboratory Calibration |
| Key word | Transpiration, Sapflow Measurement, Japanese Cypress, Laboratory Calibration |