Irrigation strategies to improve the water use efficiency of wheat-maize double cropping systems in North China Plain

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Show simple item record Fang, Q Ma, L Yu, Q Ahuja, LR Malone, RW Hoogenboom, G 2012-02-02T08:40:48Z 2010-01
dc.identifier.citation Agricultural Water Management, 2010, 97 (8), pp. 1165 - 1174
dc.identifier.issn 0378-3774
dc.identifier.other C1UNSUBMIT en_US
dc.description.abstract Water is the most important limiting factor of wheat (Triticum aestivum L.) and maize (Zea mays L.) double cropping systems in the North China Plain (NCP). A two-year experiment with four irrigation levels based on crop growth stages was used to calibrate and validate RZWQM2, a hybrid model that combines the Root Zone Water Quality Model (RZWQM) and DSSAT4.0. The calibrated model was then used to investigate various irrigation strategies for high yield and water use efficiency (WUE) using weather data from 1961 to 1999. The model simulated soil moisture, crop yield, above-ground biomass and WUE in responses to irrigation schedules well, with root mean square errors (RMSEs) of 0.029 cm3 cm-3, 0.59 Mg ha-1, 2.05 Mg ha-1, and 0.19 kg m-3, respectively, for wheat; and 0.027 cm3 cm-3, 0.71 Mg ha-1, 1.51 Mg ha-1 and 0.35 kg m-3, respectively, for maize. WUE increased with the amount of irrigation applied during the dry growing season of 20012002, but was less sensitive to irrigation during the wet season of 20022003. Long-term simulation using weather data from 1961 to 1999 showed that initial soil water at planting was adequate (at 82% of crop available water) for wheat establishment due to the high rainfall during the previous maize season. Preseason irrigation for wheat commonly practiced by local farmers should be postponed to the most sensitive growth stage (stem extension) for higher yield and WUE in the area. Preseason irrigation for maize is needed in 40% of the years. With limited irrigation available (100, 150, 200, or 250 mm per year), 80% of the water allocated to the critical wheat growth stages and 20% applied at maize planting achieved the highest WUE and the least water drainage overall for the two crops.
dc.publisher Elsevier BV
dc.relation.isbasedon 10.1016/j.agwat.2009.02.012
dc.subject RZWQM, DSSAT, Irrigation management, Agricultural system models, Water use efficiency, Agronomy & Agriculture
dc.subject RZWQM; DSSAT; Irrigation management; Agricultural system models; Water use efficiency; Agronomy & Agriculture
dc.title Irrigation strategies to improve the water use efficiency of wheat-maize double cropping systems in North China Plain
dc.type Journal Article
dc.parent Agricultural Water Management
dc.journal.volume 8
dc.journal.volume 97
dc.journal.number 8 en_US
dc.publocation Netherlands en_US
dc.identifier.startpage 1165 en_US
dc.identifier.endpage 1174 en_US SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.for 0701 Agriculture, Land and Farm Management
dc.personcode 0000068864 en_US
dc.personcode 0000068862 en_US
dc.personcode 107001 en_US
dc.personcode 0000068863 en_US
dc.personcode 0000068865 en_US
dc.personcode 0000068866 en_US
dc.percentage 100 en_US Agriculture, Land and Farm Management 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 RZWQM; DSSAT; Irrigation management; Agricultural system models; Water use efficiency en_US
dc.description.keywords RZWQM
dc.description.keywords DSSAT
dc.description.keywords Irrigation management
dc.description.keywords Agricultural system models
dc.description.keywords Water use efficiency
dc.staffid 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

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