EFFECTS OF HIGH CO₂-CONCENTRATIONS ON VEGETABLES

Knowledge on the effects of high CO₂-concentration on plants is scanty and in some cases contradictory.
Therefore experiments have been performed in growth chambers on the effects of CO₂-concentrations from 0,5 to 3,0 % (pure bottle gas) on growth rate, disorders and stomata resistance.

Critical concentrations for cool season vegetables under optimal growing conditions vary from more than 0,5 to 3,0 %, depending on the species.
The reactions of the species to growth rate, morphogenesis and disorders are described.
Plants with an unbalanced water status were more sensitive and showed reactions at much lower CO₂-concentrations.
The results indicate, that the action of CO₂ on the regulatory ability of the stomata is one of the factors causing CO₂-disorders.

Symposium on CO2 Enrichment

B. Pfeufer, H. Krug

https://doi.org/10.17660/ActaHortic.1984.162.3