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Improving reliability of maize production in marginal rainfall environments of the North East Region

Citation

Birch, CJ and George, DL and Lisle, A and Solomon, F, Improving reliability of maize production in marginal rainfall environments of the North East Region, Proceedings of 16th Agronomy Conference 2012, 14-18 October 2012, University of New England, Armidale, NSW, pp. 1-6. (2012) [Refereed Conference Paper]


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Copyright Statement

Copyright 2012 the Regional Institute Ltd & the authors

Official URL: http://www.regional.org.au/au/asa/2012/crop-produc...

Abstract

Opportunities for expanded raingrown maize production in marginal rain:full areas (<600 mm annual rain:full) in north-eastern Australia have been studied experimentally and using crop modelling. These areas are characterised by high inter- and intra-seasonal variation in timing and amount of rainfall and periodic water stress. This study used APSIM-Maize to assess impacts of soil, climate and selected agronomic practices on predicted maize yield for early (late July-September) to late (January-February) planting in 7 day intervals, phenotypes (14, 16, 18, 20 and 22 leaves), initial :fraction of extractable water at planting (IFESW) (50, 65, 80 and 100%) of plant available water content, typical soils and plant population (1.2 to 4.2 plants m-2) across 29 widely distributed locations in NE Australia using around 100 years of weather data. Risk to crop production was assessed in terms of :factors that contributed most to yield variability. Assessment of these :factors using a simple AN OVA model showed site, IFESW, plant population, planting date, phenotype, plant population x IFESW, site x planting date and soil within site to be the major contributors to variation in predicted yield. Here we present an approach to analysis of the yield predictions as a way of identifying similar sites where similar cultivar selection and agronomic practices would be appropriate.

Item Details

Item Type:Refereed Conference Paper
Keywords:maize, modelling, risk, density, maturity, soil water
Research Division:Agricultural and Veterinary Sciences
Research Group:Crop and Pasture Production
Research Field:Agronomy
Objective Division:Plant Production and Plant Primary Products
Objective Group:Summer Grains and Oilseeds
Objective Field:Maize
Author:Birch, CJ (Associate Professor Colin Birch)
ID Code:76207
Year Published:2012
Deposited By:Agricultural Science
Deposited On:2012-03-01
Last Modified:2014-08-12
Downloads:185 View Download Statistics

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