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The effects of nutrient solution sterilization on the growth and yield of hydroponically grown lettuce
S H Schwartzkopf1, D Dudzinski, R S Minners
1Complex Systems Research Center, University of New Hampshire, Durham 03824, USA.
Hortscience : a Publication of the American Society for Horticultural Science
|October 1, 1987
Abstract:
Two methods of removing bacteria from hydroponic nutrient solution [ultraviolet (UV) radiation and submicronic filter] were evaluated for efficiency and for their effects on lettuce (Lactuca sativa L.) production. Both methods were effective in removing bacteria; but, at high intensity, the ultraviolet sterilizer significantly inhibited the production of plants grown in the treated solution. Bacterial removal by lower intensity UV or a submicronic filter seemed to promote plant growth slightly, but showed no consistent, statistically significant effect.