当前位置: X-MOL 学术Tree Physiol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
A double-ratio method (DRM) to measure fast, slow and reverse sap flows
Tree Physiology ( IF 4 ) Pub Date : 2021-06-07 , DOI: 10.1093/treephys/tpab081
Zijuan Deng 1, 2 , Heather K Vice 3 , Matthew E Gilbert 3 , Mark A Adams 4 , Thomas N Buckley 3
Affiliation  

Abstract
Sap velocity measurements are useful in fields ranging from plant water relations to hydrology at a variety of scales. Techniques based on pulses of heat are among the most common methods to measure sap velocity, but most lack ability to measure velocities across a wide range, including very high, very low and negative velocities (reverse flow). We propose a new method, the double-ratio method (DRM), which is robust across an unprecedented range of sap velocities and provides real-time estimates of the thermal diffusivity of wood. The DRM employs one upstream (proximal) temperature sensor and two downstream (distal) sensors to the source of heat. This facilitates several theoretical, heat-based approaches to quantifying sap velocity. We tested the DRM using whole-tree lysimetry in Eucalyptus cypellocarpa and found strong agreement across a wide range of velocities.


中文翻译:

用于测量快速、慢速和反向液流的双比率方法 (DRM)

摘要
液流速度测量在从植物水分关系到各种尺度的水文等领域都很有用。基于热脉冲的技术是测量汁液速度的最常用方法之一,但大多数缺乏测量大范围速度的能力,包括非常高、非常低和负速度(逆流)。我们提出了一种新方法,即双比率法 (DRM),该方法在前所未有的树液速度范围内具有稳健性,并提供木材热扩散率的实时估计。DRM 使用一个上游(近端)温度传感器和两个下游(远端)传感器连接热源。这有助于量化树液速度的几种基于热的理论方法。我们在Eucalyptus cypellocarpa中使用全树溶血法测试了 DRM并在广泛的速度范围内找到了强烈的一致性。
更新日期:2021-06-10
down
wechat
bug