Modelling the effects of climate variability and water management on crop water productivity and water balance in the North China plain

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dc.contributor.author Chen Chao en_US
dc.contributor.author Wang Enli en_US
dc.contributor.author Yu Qiang en_US
dc.contributor.editor en_US
dc.date.accessioned 2011-02-07T06:21:49Z
dc.date.available 2011-02-07T06:21:49Z
dc.date.issued 2010 en_US
dc.identifier 2008006880 en_US
dc.identifier.citation Chen Chao, Wang Enli, and Yu Qiang 2010, 'Modelling the effects of climate variability and water management on crop water productivity and water balance in the North China plain', Elsevier BV, vol. 97, no. 8, pp. 1175-1184. en_US
dc.identifier.issn 0378-3774 en_US
dc.identifier.other C1 en_US
dc.identifier.uri http://hdl.handle.net/10453/13453
dc.description.abstract In the North China Plain (NCP), while irrigation using groundwater has maintained a high-level crop productivity of the wheat¿maize double cropping systems, it has resulted in rapid depletion of groundwater table. For more efficient and sustainable utilization of the limited water resources, improved understanding of how crop productivity and water balance components respond to climate variations and irrigation is essential. This paper investigates such responses using a modelling approach. The farming systems model APSIM (Agricultural Production Systems Simulator) was first calibrated and validated using 3 years of experimental data. The validated model was then applied to simulate crop yield and field water balance of the wheat¿maize rotation in the NCP. Simulated dryland crop yield ranged from 0 to 4.5 t ha-1 for wheat and 0 to 5.0 t ha-1 for maize. Increasing irrigation amount led to increased crop yield, but irrigation required to obtain maximum water productivity (WP) was much less than that required to obtain maximum crop yield. To meet crop water demand, a wide range of irrigation water supply would be needed due to the inter-annual climate variations. The range was simulated to be 140¿420 mm for wheat, and 0¿170 mm for maize. Such levels of irrigation applications could potentially lead to about 1.5 m year-1 decline in groundwater table when other sources of groundwater recharge were not considered. To achieve maximum WP, one, two and three irrigations (i.e., 70, 150 and 200 mm season-1) were recommended for wheat in wet, medium and dry seasons, respectively. For maize, one irrigation and two irrigations (i.e., 60 and 110 mm season-1) were recommended in medium and dry seasons, while no irrigation was needed in wet season. en_US
dc.language en_US
dc.publisher Elsevier BV en_US
dc.relation.isbasedon http://dx.doi.org/10.1016/j.agwat.2008.11.012 en_US
dc.title Modelling the effects of climate variability and water management on crop water productivity and water balance in the North China plain en_US
dc.parent Agricultural Water Management en_US
dc.journal.volume 97 en_US
dc.journal.number 8 en_US
dc.publocation Netherlands en_US
dc.identifier.startpage 1175 en_US
dc.identifier.endpage 1184 en_US
dc.cauo.name SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.for 070100 en_US
dc.personcode 0000050633;0000050015;107001 en_US
dc.percentage 000100 en_US
dc.classification.name Agriculture, Land and Farm Management 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 Wheat; Maize; Irrigation; Crop yield; APSIM en_US
dc.staffid en_US


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