Architectural modeling of maize under water stress

Birch, Colin J., Thornby, David, Adkins, Steve, Andrieu, Bruno and Hanan, Jim (2008). Architectural modeling of maize under water stress. In: E. Humpreys and K. O'Keeffe, Maize Association of Australia: 6th Triennial Conference and Proceedings. Maize Association of Australia 6th Triennial Conference, Griffith, NSW, Austrlia, (335-341). 21-23 February 2006. doi:10.1071/EA06105

Author Birch, Colin J.
Thornby, David
Adkins, Steve
Andrieu, Bruno
Hanan, Jim
Title of paper Architectural modeling of maize under water stress
Conference name Maize Association of Australia 6th Triennial Conference
Conference location Griffith, NSW, Austrlia
Conference dates 21-23 February 2006
Convener Maize Association of Australia
Proceedings title Maize Association of Australia: 6th Triennial Conference and Proceedings   Check publisher's open access policy
Journal name Australian Journal of Experimental Agriculture   Check publisher's open access policy
Place of Publication Collingwood, VIC, Australia
Publisher CSIRO Publishing
Publication Year 2008
Sub-type Fully published paper
DOI 10.1071/EA06105
ISBN 9780646457826
ISSN 0816-1089
Editor E. Humpreys
K. O'Keeffe
Volume 48
Issue 3
Start page 335
End page 341
Total pages 7
Language eng
Abstract/Summary Two field experiments using maize (Pioneer 31H50) and three watering regimes [(i) irrigated for the whole crop cycle, until anthesis, (ii) not at all (experiment 1) and (iii) fully irrigated and rain grown for the whole crop cycle (experiment 2)] were conducted at Gatton, Australia, during the 2003–04 season. Data on crop ontogeny, leaf, sheath and internode lengths and leaf width, and senescence were collected at 1- to 3-day intervals. A glasshouse experiment during 2003 quantified the responses of leaf shape and leaf presentation to various levels of water stress. Data from experiment 1 were used to modify and parameterise an architectural model of maize (ADEL-Maize) to incorporate the impact of water stress on maize canopy characteristics. The modified model produced accurate fitted values for experiment 1 for final leaf area and plant height, but values during development for leaf area were lower than observed data. Crop duration was reasonably well fitted and differences between the fully irrigated and rain-grown crops were accurately predicted. Final representations of maize crop canopies were realistic. Possible explanations for low values of leaf area are provided. The model requires further development using data from the glasshouse study and before being validated using data from experiment 2 and other independent data. It will then be used to extend functionality in architectural models of maize. With further research and development, the model should be particularly useful in examining the response of maize production to water stress including improved prediction of total biomass and grain yield. This will facilitate improved simulation of plant growth and development processes allowing investigation of genotype by environment interactions under conditions of suboptimal water supply.
Subjects 080110 Simulation and Modelling
060705 Plant Physiology
Keyword Functional–structural plant modelling
Internode extension
Leaf extension
Zea mays
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online: 4 February 2008

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