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Analysis of maize canopy development under water stress and incorporation into the ADEL-Maize model

Citation

Song, Y and Birch, CJ and Hanan, J, Analysis of maize canopy development under water stress and incorporation into the ADEL-Maize model, Functional Plant Biology, 35, (10) pp. 925-935. ISSN 1445-4408 (2008) [Refereed Article]

DOI: doi:10.1071/FP08055

Abstract

Substantial progress in modelling crop architecture has been made under optimal watering conditions; however, crop production is often exposed to water stress. In this research, we develop methods for implementing the simulation of maize (Zea mays L.) canopy architectural development under water stress using data from a maize field trial in 2006-07. Data of leaf number, leaf and internode extension were collected using non-destructive and destructive sampling at 2-3 day intervals. Water stress reduced the extension rate of organs and, therefore, their final length, the reduction being greater as severity of water stress increased. The duration of extension of organs in most phytomers was not significantly affected by water stress. Also, the rate of extension during the linear phase responded linearly to fraction of extractable soil water. An existing 3-D architectural model ADEL-Maize was revised using relationships developed in this study to better incorporate effects of water stress on organ extension and production. Simulated canopy production under three water regimes was validated by comparing predicted final leaf and internode length, plant height and leaf area to independent observations. The analysis and simulation showed that maize organ extension and final length under water stress can be adequately represented by simple linear patterns that are easily integrated into models.

Item Details

Item Type:Refereed Article
Research Division:Agricultural and Veterinary Sciences
Research Group:Crop and Pasture Production
Research Field:Crop and Pasture Biochemistry and Physiology
Objective Division:Plant Production and Plant Primary Products
Objective Group:Winter Grains and Oilseeds
Objective Field:Oats
UTAS Author:Birch, CJ (Associate Professor Colin Birch)
ID Code:52686
Year Published:2008
Web of Science® Times Cited:11
Deposited By:Agricultural Science
Deposited On:2008-08-01
Last Modified:2010-06-04
Downloads:0

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