Vol. 73 No: 2

Title:
Acclimatization and the Growth of Ficus Benjamina Microcuttings as Affected by Carbon Dioxide Concentration

Authors:
B. MATYSIAK and J. NOWAK

pp: 185-188

Abstract:
The influence of CO₂ concentrations (350 and 1200 µmol mol^-1) on the growth of Ficus benjamina microcuttings cv. Golden King and cv. Natasja, was investigated with reference to light levels (50 and 150 µmol m^-2 s^-1 PPFD, Photosynthetic Photon Flux Density) and the nutrient solution concentrations (0.7, 1.4, 2.1 and 2.8 mS cm^-1 EC, electrical conductivity). Plants grown in peat + perlite at 1,200 µmol mol^-1CO₂ concentration and simultaneously at high PPFD level (150 µmol m^-2 s^-1) had the highest shoot and root fresh weights and the highest leaf area. Elevation of CO₂ concentration at low level of PPFD did not affect the growth of F. benjamina. Survival of F. benjamina microcuttings cultivated in rockwool was low (65–90%) and the growth rate was slow, irrespective of nutrient solution concentration. CO₂ enrichment increased survival and accelerated the growth of these microcuttings. The best growth of F. benjamina microcuttings cultivated in rockwool was at 1,200 µmol mol^-1 CO₂ and the highest level of electrical conductivity (EC) 2.8 mS cm^-1.

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