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Maize canopy development in response to increasing plant population density


Rui, Y and Hao, J and Bedane, G and Birch, CJ and Song, Y, Maize canopy development in response to increasing plant population density, Proceedings of 16th Agronomy Conference 2012, 14-18 October 2012, University of New England, Armidale, NSW, pp. 1-5. (2012) [Refereed Conference Paper]


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Copyright 2012 the Regional Institute Ltd & the authors

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Improving crop production via adjustment of plant population density (PPD) largely depends on canopy development and light interception. Accordingly, it is essential to investigate the details of how canopy development responds to PPD. A field experiment was undertaken in China in 2009 to examine maize organ development across plant densities i.e. 2, 6, 12 and 20 plants m2. Lengths of laminae and sheaths were both increased in lower phytomers due to greater extension duration and decreased in upper phytomers due to reduced extension rate in response to more interplant competition as PPD increased. However, sheath extension appeared less affected by competition stress than lamina extension. Internode length was increased due to higher extension rate at high PPD. This study indicated that leaves and internodes utilized different strategies to cope with interplant competition. In addition, the findings can be used in modelling canopy production under different plant densities.

Item Details

Item Type:Refereed Conference Paper
Keywords:Zea mays, canopy production, interplant competition, organs
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Crop and pasture production
Research Field:Crop and pasture production not elsewhere classified
Objective Division:Plant Production and Plant Primary Products
Objective Group:Grains and seeds
Objective Field:Maize
UTAS Author:Birch, CJ (Associate Professor Colin Birch)
ID Code:82105
Year Published:2012
Deposited By:Agricultural Science
Deposited On:2013-01-16
Last Modified:2014-08-12
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