76207 - Improving reliability of maize production in variable rainfall environments of the North East Region.pdf (243.26 kB)
Improving reliability of maize production in marginal rainfall environments of the North East Region
conference contribution
posted on 2023-05-23, 05:49 authored by Birch, CJ, George, DL, Lisle, A, Solomon, FOpportunities 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.
History
Publication title
Proceedings of 16th Agronomy Conference 2012Editors
I Yunusa and GJ BlairPagination
1-6Department/School
Tasmanian Institute of Agriculture (TIA)Publisher
Australian Society of AgronomyPlace of publication
University of New England, Armidale, NSWEvent title
16th Australian Agronomy ConferenceEvent Venue
University of New England, Armidale, NSWDate of Event (Start Date)
2012-10-14Date of Event (End Date)
2012-10-18Rights statement
Copyright 2012 the Regional Institute Ltd & the authorsRepository Status
- Open