Articles
HYDROPONIC LETTUCE PRODUCTION INFLUENCED BY INTEGRATED SUPPLEMENTAL LIGHT LEVELS IN A CONTROLLED ENVIRONMENT AGRICULTURE FACILITY: EXPERIMENTAL RESULTS
Article number
418_5
Pages
45 – 52
Language
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 m-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 PPFintegral of 17 mol m-2 d-1.
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 m-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 PPFintegral of 17 mol m-2 d-1.
Authors
A.J. Both, L.D. Albright, R.W. Langhans, R.A. Reiser, B.G. Vinzant
Keywords
Online Articles (32)