Radiation- and water-use associated with growth and yields of wheat and chickpea in sole and mixed crops

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dc.contributor.author Jahansooz, MR
dc.contributor.author Yunusa, IAM
dc.contributor.author Coventry, DR
dc.contributor.author Palmer, AR
dc.contributor.author Eamus, D
dc.date.accessioned 2009-12-21T02:30:47Z
dc.date.issued 2007-04
dc.identifier.citation European Journal of Agronomy, 2007, 26 (3), pp. 275 - 282
dc.identifier.issn 1161-0301
dc.identifier.other C1 en_US
dc.identifier.uri http://hdl.handle.net/10453/3926
dc.description.abstract A renewed interest in mixed cropping for its potential to boost yields through increased capture and use of solar radiation and soil-water by the component species. This led to the present study, in which we assessed the performance of wheat and chickpea, grown as sole crops or mixed at half their sole crop populations for their capacity to capture and use solar radiation and soil-water. Trials were conducted in the drought season of 1994 and with or without supplementary irrigation in an average rainfall season of 1995. For the rainfed crops in both years, there was no advantage of mixed crops over wheat grown as a sole crop (wheat-s) either in terms of green area index (GAI), fraction of photosynthetically active radiation intercepted by the canopy (iPAR), dry matter (DM) or grain yield produced. The lack of a yield advantage of mixed cropping was associated with poor canopy development and low yielding capacity of chickpea; it was unable to compensate for its reduced population density in the mixture. Grain yield for chickpea in the mixed crop (chickpea-m) averaged just 29% that of its sole crop (chickpea-s), whereas wheat grown in mixture (wheat-m) produced 72% the yield for wheat-s. Supplementary irrigation from early spring onwards in 1995 increased yield for chickpea-m by 44% over that of chickpea-s, while yield for wheat-m fell to 65% that for wheat-s. Every millimetre of irrigation water increased yield by 10.0, 3.8 and 12.5 kg ha-1 for wheat-s, mixed crop and chickpea-s, respectively. Mixed cropping did not affect the time taken by either wheat or chickpea to attain maximum growth rate, flowering or maturity. The land equivalent ratio (LER) based on grain yields for wheat-chickpea intercropping were 1.01 in 1994, 1.02 without irrigation in 1995, and 1.10 with irrigation in 1995. Neither radiation-use-efficiency nor water-use-efficiency was improved by mixed cropping compared with wheat-s. The poor performance of the mixed crop was ascribed to its poor canopy development early in the season, especially by the chickpea that resulted in low iPAR and transpiration. It is concluded that there was no advantage of growing wheat and chickpea in mixed crops in southern cereal belts of Australia if total biomass or grain yield is the primary purpose. © 2006 Elsevier B.V. All rights reserved.
dc.language eng
dc.relation.hasversion Accepted manuscript version en_US
dc.relation.isbasedon 10.1016/j.eja.2006.10.008
dc.title Radiation- and water-use associated with growth and yields of wheat and chickpea in sole and mixed crops
dc.type Journal Article
dc.parent European Journal of Agronomy
dc.journal.volume 3
dc.journal.volume 26
dc.journal.number 3 en_US
dc.publocation Amsterdam en_US
dc.identifier.startpage 275 en_US
dc.identifier.endpage 282 en_US
dc.cauo.name SCI.Environmental Sciences en_US
dc.conference Verified OK en_US
dc.for 0703 Crop and Pasture Production
dc.personcode 000006
dc.personcode 030005
dc.personcode 995490
dc.percentage 100 en_US
dc.classification.name Crop and Pasture Production en_US
dc.classification.type FOR-08 en_US
dc.description.keywords Dry matter production
dc.description.keywords Evapotranspiration
dc.description.keywords Grain yield
dc.description.keywords Irrigation
dc.description.keywords Land equivalent ratio (LER)
dc.description.keywords Radiation-use-efficiency
dc.description.keywords Soil evaporation
dc.description.keywords Transpiration
dc.description.keywords Water-use-efficiency
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
utslib.copyright.status Closed Access
utslib.copyright.date 2015-04-15 12:23:47.074767+10
pubs.consider-herdc true
utslib.collection.history School of the Environment (ID: 344)
utslib.collection.history General (ID: 2)

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