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Photosynthesis measurements on adult trees: a comparison between field and laboratory measurements

, : Photosynthesis measurements on adult trees: a comparison between field and laboratory measurements. Silva Gandavensis ( 62): 36-50

Photosynthesis parameters were measured in oak (Quercus robur), beech (Fagus sylvatica) and ash (Fraxinus excelsior) in the phytotron and at field sites in East-Flanders during 1996-97 using a WALZ-porometer. In the phytotron temperature and humidity could be maintained at a constant level, while this was not possible with the WALZ-porometer. On the other hand, phytotron measurements were carried out on cut off branches, thus inevitably disturbing natural photosynthesis.


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