The ultimate goal is to substantially reduce energy use in greenhouses by optimising the spectrum of LED light, while maintaining or even improving production and product quality. Optimal use of additional farred (FR) will be studied: (1) Minimum intensity and optimal timing of FR needed to obtain significant yield increases, (2) Physiological and morphological aspects explaining genotypic variation in response to FR, (3) Where in the plant is the FR signal perceived and how is it transduced?
Reduce energy use in greenhouses by optimizing the LED light spectrum
Supplementary light in horticulture is usually provided with HPS lamps. The efficiency of HPS lamps is at best 1.8 μmol per J, whereas efficiencies as high as 3.5 μmol per J have been reported for LEDs. This means that a transition from HPS to the most efficient LEDs would reduce energy use for lighting by about 50%. This project improves the production per unit LED light, and results therefore will stimulate the transition from HPS to LED. This project contributes to key technology ST1. Smart Technologies in Agri-Horti-Water-Food. This project focuses on LED technology, and furthermore advanced technologies for crop monitoring (e.g. chlorophyll fluorescence imaging) will be used.
Deliverables of this project are:
Understanding the physiology of responses of fruiting tomato plants to FR light
Energy-efficient strategies for supplementing FR light
Year 1: first greenhouse test of FR light on fruiting tomato plants.