The effects of nutrient solution sterilization on the growth and yield of hydroponically grown lettuce.
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.
Schwartzkopf
S H
SH
Complex Systems Research Center, University of New Hampshire, Durham 03824, USA.
Dudzinski
D
D
Minners
R S
RS
D001419:Bacteria; D018533:Biomass; D003470:Culture Media / Q000528:radiation effects; D005374:Filtration; D018527:Hydroponics; D007501:Iron; D018545:Lactuca / Q000254:growth & development* / Q000382:microbiology / Q000528:radiation effects; D013242:Sterilization / Q000379:methods*; D014466:Ultraviolet Rays
D003470:Culture Media; D007501:Iron