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Preliminary Analysis of Plant Response to Environmental Disturbances in Controlled Environments

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  024076,  2002 ASAE Annual Meeting . (doi: 10.13031/2013.9536) @2002
Authors:   David H. Fleisher
Keywords:   crop modeling, simulations, lettuce, plant growth

The ability to ensure that crop growth and development proceed according to the desired production schedule would be of great advantage for controlled environment plant production systems. One method to accomplish this is to integrate methods for predicting plant responses to changes in the local climate with environmental control algorithms. This requires mathematical crop models that can accurately predict effects of multi-day disturbances on plant growth and development. A growth chamber experiment with lettuce (Lactuca sativa L., cv. Waldmans Green) was conducted to generate experimental data on the lettuce yield and daily canopy light absorption in response to a forced light intensity disturbance. A mathematical crop model was fit to a portion of the data and used to generate lettuce yield response curves as a function of simulated disturbances in light intensity that occurred during the production cycle. Comparisons between the model predictions and experimental data show that additional model calibration and experimental treatments are required.

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