Theses and Dissertations

Issuing Body

Mississippi State University

Advisor

Li, Tongyin

Committee Member

Harkess, Richard L.

Committee Member

Bi, Guihong

Committee Member

Wilson, Jeffery C.

Committee Member

Cox, Michael S.

Date of Degree

5-12-2023

Document Type

Graduate Thesis - Campus Access Only

Major

Horticulture

Degree Name

Master of Science (M.S.)

College

College of Agriculture and Life Sciences

Department

Department of Plant and Soil Sciences

Abstract

The objective of these studies was to observe the effects of LED lighting treatments on physiological parameters of lettuce and microgreens. Four different lighting treatments; 1) Physiospec (white), 2) Red, 3) DR9 (25:75 Blue:Red), and 4) Anthospec (at 20/80 Blue:Red); were used in this experiment. Two experiments were conducted: 1) Examining the effects of LED lights on lettuce yield and photosynthetic activity and 2) The effects of switching lighting regiments halfway through the growth cycle on Kale microgreen yield and color. Physiospec lighting was found to promote the highest yield and photosynthetic activity among the four treatments for lettuce. It was found that changing from Physiospec lighting to Red lighting increased the fresh mass and stem height of kale microgreens. This also made the microgreens a
lighter shade of green.

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