Körner Christian, Würth Mirjam
Institute of Botany, University of Basel, Schönbeinstrasse 6, CH-4056, Basel, Switzerland.
Oecologia. 1996 Sep;107(4):421-425. doi: 10.1007/BF00333930.
The effects of atmospheric CO enrichment on mature trees in their natural environment are largely unknown. Here we present a new, and inexpensive technique which can be used in situ to address some key physiological questions related to the CO problem. Small, light-weight cups mounted on the lower side of rigid leaves at the top of tall tropical forest trees were supplied with CO-enriched air derived from a low-technology air mixing device utilizing forest floor CO evolution. We present the scientific rationale for such field experiments, technical details, an assessment of potential cup artifacts and first results illustrating effects of elevated CO on stomata and carbohydrate accumulation in the canopies of mature trees.
大气中二氧化碳浓度升高对自然环境中成熟树木的影响在很大程度上尚不明确。在此，我们介绍一种新的、低成本的技术，该技术可用于原位研究，以解决一些与二氧化碳问题相关的关键生理问题。在高大热带森林树木顶端坚硬叶片的下侧安装小型、轻质的杯子，这些杯子被通入利用林地二氧化碳释放的低技术空气混合装置产生的富含二氧化碳的空气。我们阐述了此类田间试验的科学依据、技术细节、对潜在杯子假象的评估以及首批结果，这些结果说明了二氧化碳浓度升高对成熟树木树冠气孔和碳水化合物积累的影响。
