The effect of potassium concentration on growth, essential oil composition and nutrient uptake of Origanum vulgare L. subsp. hirtum Link letswaart in solution culture
1998
Fournaraki, C.
The experiment was conducted to investigate the effect of three different concentrations of potassium, k1=200, 2k=400, k3=600 ppm on growth, nutrient uptake and essential oil content and composition of Origanum vulgare subsp. hirtum. Single plant rooted cuttings were grown in solution culture in an unheated glasshouse over a period of 120 days March to July. The nutrient Film Technique NFT installation used consisted of six independent NFT units with the same nutrient solution applied for two different NFT channels as replications. Nutrient N, P, K and water uptake, as well as shoot growth parameters and essential oil content during the various stages of plant development before flowering, flowering, seed formation were studied. The potassium concentrations used during this experiment had no effect on the growth of Origanum vulgare plants, neither on the essential oil yields nor on composition.
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