SYSTEMATIC CALIBRATION AND DEPICTION OF ADAPTATION TO WATER STRESS OF THE PHYSIOLOGICALLY BASED CORN-CROPS MODEL
Abstract
The physiologically based CORN-CROPS model was systematically calibrated using growth data of a single hybrid over a three year period to determine the validity of the plant response: environment relationships. A comparison of the growth parameters calculated by the calibration procedure showed a variation among years. The variation may have been a result of inherent weaknesses of how certain physiological processes were modeled. The systematic procedure was used to identify principal limitations to yield, and to determine if the physiological response was limited by genetic potential, environmental factors or feedback control. In conjunction with the calibration procedure the water relations routine within the model was updated to include an adaptation response to stress periods. A water stress experiment was conducted to measure leaf water potential changes to recurring stress treatments. An adaptation factor was implemented into the model and improved the depiction of leaf growth for the growing season.
Degree
Ph.D.
Subject Area
Agronomy
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