Experimental branch warming alters tall tree leaf phenology and acorn production
Experimental branch warming alters tall tree leaf phenology and acorn production
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DOI：
10.1016/j.agrformet.2010.04.001
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发表时间：
2010-07
影响因子：
6.2
通讯作者：
Masahiro Nakamura;O. Muller;Shiori Tayanagi;T. Nakaji;T. Hiura
中科院分区：
文献类型：
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作者：
Masahiro Nakamura;O. Muller;Shiori Tayanagi;T. Nakaji;T. Hiura
越来越多的实地试验已经在世界范围内开始研究模拟全球变暖的影响。为了通过实验确定高大的成熟树木对变暖的反应，我们开发了一种新技术，用电热电缆加热树冠层的树枝。使用树冠起重机，我们将电缆连接到高大成熟的栎树（18 - 20米高）的树冠顶部树枝上；茎部温度比环境温度高5℃。树枝增温通过后期落叶延长了冠层叶片生长季节的长度。此外，树枝增温提高了橡子产量。这项技术的应用将有助于更好地了解高大、成熟的树木对全球变暖的反应。
An increasing number of field experiments have been initiated worldwide to study simulated effects of global warming. To experimentally determine how tall, mature trees respond to warming, we developed a new technique that heated canopy-level branches with electric heating cables. Using a canopy crane, we attached electric cables to top canopy branches of tall, mature Quercus crispula Blume (18–20m in height) trees; shoot temperature was elevated 5°C above ambient. Branch warming extended the length of the growing season of canopy leaves by later leaf fall. Moreover, branch warming increased acorn production. Application of this technique should lead to a better understanding of how tall, mature trees respond to global warming.