行道樹水黃皮二氧化碳固定效益之研究

The Carbon Dioxide Fixation Efficiency of Pongamia Pinnata of Sidewalk Tree

王亞男(Ya-Nan Wang) ； 劉秀卿(Show-Ching Liou) ； 蕭英倫(Ing-Lun Shiau)

《中華林學季刊》 38卷2期 (2005/06) Pp. 151-161

https://doi.org/10.30064/QJCF.200506.0002

摘要

本研究利用行道樹栽植10年生之水黃皮為材料，自2002年4月至2003年3月，每月選擇晴天一天，自上午八時至下午四時，分別就水黃皮冠層之上部及下部葉片進行光合作用速率、蒸散速率、氣孔導度及其相關因子葉溫、光度、相對濕度與CO2濃度之測定。結果上部葉片淨光合作速率日平均值為3.04 μmol m^(-2)s^(-1)，蒸散速率0.93 m mol m^(-2)s^(-1)，氣孔導度91.89 m mol m^(-2)s^(-1)，葉片溫度25.59℃，光度555.08 μ mol m^(-2)s^(-1)，相對濕度53%，CO2濃度340.42 μLL^(-1)；下部葉片淨光合作速率日平均值為2.17 μmol m^(-2)s^(-1)，蒸散速率0.72 m mol m^(-2)s^(-1)，氣孔導度87.61 m mol m^(-2)s^(-1)，葉片溫度24.82℃，光度347.5 μmol m^(-2)s^(-1)，相對濕度51%，CO2濃度340.50 μLL^(-1)，全株每年可固定CO2量為18.02kg。

關鍵字

水黃皮 ； 淨光合作用速率 ； 蒸散速率 ； 氣孔導度

並列摘要

The Carbon Dioxide fixation efficiency of Pongamia pinnata which will be a reference for sidewalk trees planning afterward, was analyzed by measuring net photosynthetic rate, transpiration rate, stomatal conductance rate, air temperature, light intensity, relative humidity and the concentration CO2, from 8 am to 4 pm, one sunny day of every month. In upper leaf, the mean value of net photosynthetic rate was 3.04 μ mol m^(-2)s^(-1), transpiration rate was 0.93 m mol m^(-2)s^(-1), stomatal conductance rate was 91.89 m mol m^(-2)s^(-1), leaf temperature was 25.59℃, light intensity was 555.08 μmol m^(-2)s^(-1), relative humidity was 53% and the concentration of carbon dioxide was 340.42 μLL^(-1), In aspect of lower leaf, the mean value of net photosynthetic rate was 2.17 μ mol m^(-2)s^(-1), transpiration rate was 0.72 m mol m^(-2)s^(-1), stomatal conductance rate was 87.61 m mol m^(-2)s^(-1), leaf temperature was 24.82℃, light intensity was 347.5 μmol m^(-2)s^(-1), relative humidity was 51% and the concentration of carbon dioxide was 340.50 μLL^(-1) for one year, the carbon dioxide fixation of whole tree estimated was 18.02 kg.

並列關鍵字

Pongamia pinnata ； Net photosynthetic rate ； Transpiration rate ； Stomatal conductance rate