Modeling nitrogen and water management effects in a wheat-maize double-cropping system

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dc.contributor.author Fang, Q
dc.contributor.author Ma, L
dc.contributor.author Yu, Q
dc.contributor.author Malone, RW
dc.contributor.author Saseendran, SA
dc.contributor.author Ahuja, LR
dc.date.accessioned 2010-05-28T09:43:59Z
dc.date.issued 2008-01
dc.identifier.citation Journal of Environmental Quality, 2008, 37 (6), pp. 2232 - 2242
dc.identifier.issn 0047-2425
dc.identifier.other C1UNSUBMIT en_US
dc.identifier.uri http://hdl.handle.net/10453/8553
dc.description.abstract Excessive N and water use in agriculture causes environmental degradation and can potentially jeopardize the sustainability of the system. A field study was conducted from 2000 to 2002 to study the effects of four N treatments (0, 100, 200, and 300 kg N ha1 per crop) on a wheat (Triticum aestivum L.) and maize (Zea mays L.) double cropping system under 70 ± 15% field capacity in the North China Plain (NCP). The root zone water quality model (RZWQM), with the crop estimation through resource and environment synthesis (CERES) plant growth modules incorporated, was evaluated for its simulation of crop production, soil water, and N leaching in the double cropping system. Soil water content, biomass, and grain yield were better simulated with normalized root mean square errors (NRMSE, RMSE divided by mean observed value) from 0.11 to 0.15 than soil NO3N and plant N uptake that had NRMSE from 0.19 to 0.43 across these treatments. The long-term simulation with historical weather data showed that, at 200 kg N ha1 per crop application rate, auto-irrigation triggered at 50% of the field capacity and recharged to 60% field capacity in the 0- to 50-cm soil profile were adequate for obtaining acceptable yield levels in this intensified double cropping system. Results also showed potential savings of more than 30% of the current N application rates per crop from 300 to 200 kg N ha1, which could reduce about 60% of the N leaching without compromising crop yields.
dc.publisher American Society for Agronomy
dc.relation.isbasedon 10.2134/jeq2007.0601
dc.title Modeling nitrogen and water management effects in a wheat-maize double-cropping system
dc.type Journal Article
dc.parent Journal of Environmental Quality
dc.journal.volume 6
dc.journal.volume 37
dc.journal.number en_US
dc.journal.number 6 en_US
dc.publocation USA en_US
dc.identifier.startpage 2232 en_US
dc.identifier.endpage 2242 en_US
dc.cauo.name SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.for 0703 Crop and Pasture Production
dc.personcode 107001
dc.percentage 100 en_US
dc.classification.name Crop and Pasture Production en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity en_US
dc.description.keywords en_US
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
pubs.organisational-group /University of Technology Sydney/Strength - C3
utslib.copyright.status Closed Access
utslib.copyright.date 2015-04-15 12:17:09.805752+10
utslib.collection.history Closed (ID: 3)


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