Full text of this article is only available in PDF format.

Pertti Hari (email), Eeva Korpilahti, Toivo Pohja, Pentti K. Räsänen

A field system for measuring the gas exchange of forest trees.

Hari P., Korpilahti E., Pohja T., Räsänen P. K. (1990). A field system for measuring the gas exchange of forest trees. Silva Fennica vol. 24 no. 1 article id 5405. https://doi.org/10.14214/sf.a15557

Abstract

A third generation of forest tree gas exchange measuring system design for the use in the field is described. The system is designed to produce data for determining the dependence of the rate of tree photosynthesis, respiration and transpiration on environmental factors. The system consists of eight cuvettes, a tubing system, two infrared gas analysers, an air flow controller, a data logger, and a computer. The measuring cuvette is a clap type, i.e. it is mostly open, only closing during measurement. CO2 exchange is measured as the change in the cuvette concentration of CO2, and, transpiration is measured as the increase in water vapour concentration while the cuvette is closed. The environmental factors measured are temperature, irradiance and air pressure. The system was planned in 1987 and constructed in 1988. It worked reliably in late summer 1988 and the quality of data seems to be satisfactory. 

The PDF includes an abstract in Finnish.

Keywords
photosynthesis; CO2; monitoring; measuring methods; transpiration; environment; gas exchange; respiration

Published in 1990

Views 463

Available at https://doi.org/10.14214/sf.a15557 | Download PDF

Creative Commons License

Register
Click this link to register to Silva Fennica.
Log in
If you are a registered user, log in to save your selected articles for later access.
Contents alert
Sign up to receive alerts of new content

Your selected articles
Your search results
Hari P., Korpilahti E. et al. (1990) A field system for measuring the gas exchange of.. Silva Fennica vol. 24 no. 1 article id 5405
Luukkanen O., Räsänen P. K. et al. (1971) The use of needle colour in predicting growth an.. Silva Fennica vol. 5 no. 4 article id 4853
Räsänen P. K., Hänninen T. (1971) The effect of some over-winter storage methods o.. Silva Fennica vol. 5 no. 3 article id 4849
Räsänen P. K., Hiltunen M. (1971) The effect of differences in Scots pine nursery .. Silva Fennica vol. 5 no. 3 article id 4847
Yli-Vakkuri P., Räsänen P. K. (1971) The influence of covering and tramping the seeds.. Silva Fennica vol. 5 no. 1 article id 4832
Räsänen P. K., Koukkula A. et al. (1970) The effect of packing, storing and heeling-in on.. Silva Fennica vol. 4 no. 1 article id 4812
Hallman E., Hari P. et al. (1978) Effect of planting shock on the transpiration, p.. Silva Fennica vol. 0 no. 161 article id 7595
Räsänen P. K., (1970) The effect of lifting date, packing, storing and.. Silva Fennica vol. 0 no. 112 article id 7546
Yli-Vakkuri P., Räsänen P. K. et al. (1968) Cold-storage and its effects on the field surviv.. Silva Fennica vol. 0 no. 88 article id 7188