EFFECTS OF CO₂ CONCENTRATION ON GROWTH OF GLASSHOUSE CUCUMBER

Glasshouse cucumber cv ‘Corona’ was planted twice, on 15 December 1982 and 27 January 1983 under six CO₂ concentrations.
Two CO₂ concentration values were maintained below 340 ppm, and four values were kept above ambient up till 2800 ppm.
The CO₂ concentrations were controlled during daytime from one hour before sunrise until half an hour before sunset.

During the experiment the night/day temperature setpoints in the six compartments were 18/22° C.

Data on harvested fruit in relation to CO₂ concentration are shown.
Saturation of CO₂ effects on harvest rates is found near 1000 ppm irrespective of light conditions.

The increase of the production caused by every increase of the CO₂ concentration by 50 ppm is given from 100 till 400 ppm CO₂.

Symposium on CO2 Enrichment

G. Heij, J.A.M. van Uffelen

https://doi.org/10.17660/ActaHortic.1984.162.2