Canopy and tree morphology are assumed to play a significant role in modulating the amount of rainfall water during its routing throughout the vegetation and the near‐surface Critical Zone. One crucial point of research addresses the spatial extent of stemflow (SF) infiltration, because its concentration over small areas at the trunk base appears to affect the magnitude and timing of water and solutes input to the soil and hence amplify biogeochemical cycling. By a Brilliant Blue tracer experiment, we examined the flow patterns of SF water along the trunk surface of two broadleaved tree species (Fagus sylvatica and Acer pseudoplatanus) and the infiltration area at the trunk base and down to 0.12‐m soil depth following natural rainfall events.

中文翻译：

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沿树皮表面的非均匀但高度优先的茎流路径和实际的入渗面积比以前假定的要小：以欧洲山毛榉（Fagus sylvatica L.）和美国梧桐枫（Acer pseudoplatanus L.）为例。

假定冠层和树木的形态在整个植被和近地表关键区的路径中对调节雨水量起着重要作用。研究的一个关键点是干流（SF）入渗的空间范围，因为其在干基底部小区域的浓度似乎会影响向土壤中输入的水和溶质的量和时间，从而扩大生物地球化学循环。通过Brilliant Blue示踪剂实验，我们研究了SF水沿两种阔叶树种（浅青豆和Acer pseudoplatanus）的树干表面的流动模式以及树干底部的渗透区以及自然降雨后土壤深度低至0.12-m的情况。事件。