Negative ions in the atmosphere: Possible beneficial effects?

R. Lips, S.D. Probert and L. Daly

Applied Energy, 1987, vol. 28, issue 1, 9 pages

Abstract: In a trial, 10 cucumber plants (Cucumis sativus, variety [`]Virgo' F1 hybrids) were exposed continuously to a concentration of negative air ions exceeding 50 000/c.c. for a period of 40 days. The yield and productivity of the treated plants were compared with those of a control group of 10 plants in a matched-pairs experiment. An Index of Initial Vigour was developed to allow the subsequent production of the previously nursery-grown young plants to be related to their condition at the beginning of the trial. No effect on the total production or productivity at the end of the 40-day period was discerned, but the interim results (e.g. for the 10th day) are consistent with a model of reaction to stress governed by a negative-feedback mechanism. No harmful effects of the use of negatively ionised air were detected.

Date: 1987
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