An empirical method that separates irreversible stem radial growth from bark water content changes in trees: theory and case studies.
An empirical method that separates irreversible stem radial growth from bark water content changes in trees: theory and case studies.
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DOI：
10.1111/pce.12863
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发表时间：
2017-03
期刊：
影响因子：
--
通讯作者：
Pfautsch S
中科院分区：
文献类型：
--
作者：
Mencuccini M;Salmon Y;Mitchell P;Hölttä T;Choat B;Meir P;O'Grady A;Tissue D;Zweifel R;Sevanto S;Pfautsch S
我们对树干生长的了解存在很大的不确定性，一些最基本的问题，例如茎径向生长在日常周期中何时发生，仍然没有答案。我们采用高分辨率点树仪、液流传感器，并开发了理论和统计方法，设计了一种新方法，将不可逆径向生长与弹性张力驱动和弹性渗透驱动的树皮含水量变化分开。我们使用来自五个案例研究物种的数据测试了这种方法。实验操作，即赤松的田间灌溉实验和红林胶树的茎环剥实验，被用来验证该理论。灌溉和茎环剥后茎径向生长的时间进程与先验预测一致。不同案例研究中茎径向生长的模式各不相同，生长发生在白天和/或夜间，与现有文献一致。重要的是，我们的方法为现有方法提供了一种有价值的替代方案，因为它可以通过简单的经验插值例程来近似，该插值例程使用标准回归技术得出不可逆的径向增长。我们的新方法提供了对亚日时间尺度上树干的相对源库碳动态的更好的理解。我们对树干生长日常模式的了解是有限的。使用液流传感器和茎树计来隔离不可逆的茎径向生长。新理论的发展完全允许将弹性与不可逆的直径变化分开。在干旱条件下，生长仅限于夜间。在浇水充足的条件下，生长往往发生在整个 24 小时周期中，不同案例研究存在差异。
Substantial uncertainty surrounds our knowledge of tree stem growth, with some of the most basic questions, such as when stem radial growth occurs through the daily cycle, still unanswered. We employed high‐resolution point dendrometers, sap flow sensors, and developed theory and statistical approaches, to devise a novel method separating irreversible radial growth from elastic tension‐driven and elastic osmotically driven changes in bark water content. We tested this method using data from five case study species. Experimental manipulations, namely a field irrigation experiment on Scots pine and a stem girdling experiment on red forest gum trees, were used to validate the theory. Time courses of stem radial growth following irrigation and stem girdling were consistent with a‐priori predictions. Patterns of stem radial growth varied across case studies, with growth occurring during the day and/or night, consistent with the available literature. Importantly, our approach provides a valuable alternative to existing methods, as it can be approximated by a simple empirical interpolation routine that derives irreversible radial growth using standard regression techniques. Our novel method provides an improved understanding of the relative source–sink carbon dynamics of tree stems at a sub‐daily time scale. Our knowledge of the daily patterns of tree stem growth is limited. Sap flow sensors and stem dendrometers were used to isolate irreversible stem radial growth. New theory was developed that fully permits to separate elastic from irreversible diameter changes. Under drought conditions, growth was limited to night‐time. Under well‐watered conditions, growth tended to occur throughout the 24 h cycle, with differences from case study to case study.
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影响因子：
6.9
作者：
KANNINEN, M
通讯作者：
KANNINEN, M
碳和水在调节黑云杉幼苗木材形成中的贡献
影响因子：
7.4
作者：
Deslauriers, Annie;Huang, Jian-Guo;Rossi, Sergio
通讯作者：
Rossi, Sergio
DOI：
10.1051/forest:19850204
发表时间：
1985-01-01
期刊：
ANNALES DES SCIENCES FORESTIERES
影响因子：
--
作者：
GRANIER, A
通讯作者：
GRANIER, A
影响因子：
4.2
作者：
De Swaef, Tom;Hanssens, Jochen;Steppe, Kathy
通讯作者：
Steppe, Kathy
影响因子：
7.4
作者：
Génard, M;Fishman, S;Habib, R
通讯作者：
Habib, R