Improvement of the Probe for Measuring Water Flow Rate in Intact Plants with the Stem Heat Balance Method
Improvement of the Probe for Measuring Water Flow Rate in Intact Plants with the Stem Heat Balance Method
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DOI：
10.2480/agrmet.40.273
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发表时间：
1984-12
影响因子：
1.3
通讯作者：
T. Sakuratani
中科院分区：
文献类型：
--
作者：
T. Sakuratani
改进了一种用茎热平衡法测量完整植株茎内水分流动速率的探头。它主要由用于向植物茎提供恒定热能的柔性平板加热器、用于确定从加热器表面到周围空气的热损失的热流传感元件以及用于检测茎温度的热电偶组成。改进后的探头可以很容易地安装到茎上或从茎上取下，并且几乎不会阻止植物茎的径向生长。用天平测量的蒸腾速率与用新探头测得的水流量进行了比较，结果表明，新探头能够测量细长植物茎中的水通量，误差可接受，与原测量装置的水平基本相同。
A probe was improved for measuring the rate of water flow in the stem of intact plants with the stem heat balance method. It consists essentially of flexible flat heater for feeding constant heat energy to a plant stem, heat flow sensing element for determining heat loss from the surface of the heater to the surrounding air and thermocouples for detecting stem temperatures. The improved probe can be easily set and removed to/from the stem and hardly arrests the radial growth of the plant stem. The comparison of the transpiration rate measured by a balance and the water flow rate determined by the new probe showed that the new probe was able to determine the water flux in a thin plant stem with acceptable error which was almost the same level attained with the original measuring device.