Hydroponic lettuce production influenced by integrated supplemental light levels in a controlled environment agriculture facility: Experimental results

A. J. Both, L. D. Albright, R. W. Langhans, R. A. Reiser, B. G. Vinzant

Research output: Contribution to journalArticlepeer-review

42 Scopus citations

Abstract

Bibb lettuce (Lactuca sativa L., cv. Ostinata) was grown in peat-vermiculite plugs placed in a recirculating hydroponic (NFT) system. Supplemental lighting was used to reach different PPFtarget levels in each of 35 treatments. A second order exponential polynomial was developed to predict DW accumulation for PPFtarget levels between 8 and 22 mol nr -2 d-1. Little difference in DW production was noted between lettuce grown under daytime and nighttime lighting. Tipburn was prevented using a fan blowing greenhouse air vertically down onto the lettuce plants. Marketable (150 g FW) lettuce heads were produced in 24 days after transplant while receiving an average PPFintegrai of 17 mol m-2 d-1.

Original languageEnglish (US)
Pages (from-to)45-51
Number of pages7
JournalActa Horticulturae
Volume418
DOIs
StatePublished - Dec 1 1997
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Horticulture

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