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

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Show simple item record Fang, Q en_US Ma, L en_US Yu, Qiang en_US Malone, R en_US Saseendran, S en_US Ahuja, L en_US
dc.contributor.editor en_US 2010-05-28T09:43:59Z 2010-05-28T09:43:59Z 2008 en_US
dc.identifier 2008006878 en_US
dc.identifier.citation Fang Q et al. 2008, 'Modeling nitrogen and water management effects in a wheat-maize double-cropping system', American Society for Agronomy, vol. 37, pp. 2232-2242. en_US
dc.identifier.issn 0047-2425 en_US
dc.identifier.other C1UNSUBMIT en_US
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 ha?1 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 NO3?N 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 ha?1 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 ha?1, which could reduce about 60% of the N leaching without compromising crop yields. en_US
dc.language en_US
dc.publisher American Society for Agronomy en_US
dc.relation.isbasedon en_US
dc.title Modeling nitrogen and water management effects in a wheat-maize double-cropping system en_US
dc.parent Journal of Environmental Quality en_US
dc.journal.volume 37 en_US
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 SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.for 070300 en_US
dc.personcode 0000051711 en_US
dc.personcode 0000052123 en_US
dc.personcode 107001 en_US
dc.personcode 0000051714 en_US
dc.personcode 0000051726 en_US
dc.personcode 0000051713 en_US
dc.percentage 100 en_US Crop and Pasture Production en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US en_US
dc.location.activity en_US
dc.description.keywords en_US
dc.staffid en_US

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