Effect of dissolved oxygen concentration on lettuce growth in floating hydroponics

E. Goto, A. J. Both, L. D. Albright, R. W. Langhans, A. R. Leed

Research output: Contribution to journalArticlepeer-review

53 Scopus citations


Lettuce (Lactuca sativa L., cv. Ostinata) growth experiments were carried out to study the effect of dissolved oxygen (DO) concentration on plant growth in a floating hydroponic system. Pure O2 and N2 gas were supplied to the hydroponic system for precise DO control. This system made it easy to increase the DO concentration beyond the maximum (or saturation) concentration possible when bubbling air into water. Eleven day old lettuce seedlings were grown for 24 days under various DO concentrations: sub-saturated, saturated, and super-saturated. There was no significant difference in fresh weight, shoot and root dry weights among the DO concentrations: 2.1 (25% of saturated at 24°C), 4.2 (50%), 8.4 (saturated), and 16.8 (200%) mg/L. The critical DO concentration for vigorous lettuce growth was considered to be lower than 2.1 mg/L. Neither root damage nor delay of shoot growth was observed at any of the studied DO concentrations.

Original languageEnglish (US)
Pages (from-to)205-210
Number of pages6
JournalActa Horticulturae
StatePublished - Dec 1 1996
Externally publishedYes

ASJC Scopus subject areas

  • Horticulture


  • Dissolved oxygen
  • Growth
  • Hydroponics
  • Lettuce


Dive into the research topics of 'Effect of dissolved oxygen concentration on lettuce growth in floating hydroponics'. Together they form a unique fingerprint.

Cite this