Description and calibration of a dynamic model for lettuce grown in a nitrate-limiting environment

R. Linker, I. Seginer, F. Buwalda

    Research output: Contribution to journalArticleAcademicpeer-review

    19 Citations (Scopus)

    Abstract

    A three-compartment lettuce model designed to predict growth and nitrate concentration under severe nitrogen stress conditions is described and calibrated using data of N-limitation experiments. Since the limited amount of data does not allow calibration of all the model parameters, sensitivity analysis was used to determine which parameters should be estimated using this data. The calibrated model predicts quite well the main observations associated with severe nitrogen stress: reduced growth, fast depletion of nitrate, gradual reduction of reduced-N content, and considerable increase of dry matter content. After being deprived of nitrate for 21 days, stressed plants are five to ten times smaller than unstressed plants, and their dry matter content is two to three times higher than normal. Nitrate concentration of N-stressed plants drops to an insignificant level within three days, while reduced-N content decreases steadily throughout the experiment. All these observations are correctly predicted by the model
    Original languageEnglish
    Pages (from-to)1009-1024
    JournalMathematical and Computer Modelling
    Volume40
    Issue number9-10
    DOIs
    Publication statusPublished - 2004

    Keywords

    • lactuca-sativa l
    • young plants
    • greenhouse lettuce

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