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Derivation of a dynamic model of the kinetics of nitrogen uptake throughout the growth of lettuce : calibration and validation
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Zhang, Kefeng and Burns, Ian G. (2008) Derivation of a dynamic model of the kinetics of nitrogen uptake throughout the growth of lettuce : calibration and validation. Journal of Plant Nutrition, Vol.31 (No.8). pp. 1440-1460. doi:10.1080/01904160802208345 ISSN 0190-4167.
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Official URL: http://dx.doi.org/10.1080/01904160802208345
Abstract
A kinetic model of nitrogen (N) uptake throughout growth was developed for lettuce
cultivated in nutrient solution under varying natural light conditions. The model couples
nitrogen uptake with dry matter accumulation using a two-compartment mechanistic
approach, incorporating structural and non-structural pools. Maximum nitrogen uptake
rates are assumed to decline with shoot dry weight, to allow for the effects of plant
age. The model was parameterized using data from the literature, and calibrated for
differences in light intensity using an optimization algorithm utilizing data from three
experiments in different growing seasons. The calibrated model was validated against
the data from two independent experiments conducted under different light conditions.
Results showed that the model made good predictions of nitrogen uptake by plants from
seedlings to maturity under fluctuating light levels in a glasshouse. Plants grown at a
higher light intensity showed larger maximum nitrogen uptake rates, but the effect of
light intensity declined towards plant maturity.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QK Botany | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) > Warwick HRI (2004-2010) | ||||
| Library of Congress Subject Headings (LCSH): | Nitrogen in agriculture, Lettuce, Hydroponics | ||||
| Journal or Publication Title: | Journal of Plant Nutrition | ||||
| Publisher: | Taylor & Francis (Routledge) | ||||
| ISSN: | 0190-4167 | ||||
| Official Date: | August 2008 | ||||
| Dates: |
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| Volume: | Vol.31 | ||||
| Number: | No.8 | ||||
| Page Range: | pp. 1440-1460 | ||||
| DOI: | 10.1080/01904160802208345 | ||||
| Status: | Peer Reviewed | ||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||
| Description: | Final version (published as open access). |
Data sourced from Thomson Reuters' Web of Knowledge
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