 Integrated spatial–temporal analysis of crop water productivity of winter wheat in Hai BasinNana Yan and Bingfang Wu Agricultural Water Management, 2014, vol. 133, issue C, 24-33 Abstract: Achieving higher yield per unit of water is one of the most important challenges in water-limited agriculture. In this paper, crop water productivity (CWP) of winter wheat was calculated and analyzed in the plain of Hai Basin in northeastern China. The average CWP of winter wheat (Triticumaestivum L.) in the basin for 2003–2009 was 1.049kgm−3, with CWP values across the basin ranging between 0.7 and 1.4kgm−3. The spatial analysis of the relationships among CWP, yield, and evapotranspiration (ET) across the basin showed a strongly linear relationship between ET and yield (R2=0.86). The temporal analysis showed increases in yield of between 100.4–211.4kgha−1year−1 between 1984 and 2002 at eight agro-meteorological research stations across the basin without a corresponding increase in ET, corresponding to an increase in CWP of 0.02–0.1kgm−3per year. It was concluded that the improvements in CWP have resulted from improvements in crop varieties and crop husbandry rather than reductions in water consumption. Keywords: Hai Basin; Crop water productivity; Evapotranspiration; Winter wheat; Remote sensing (search for similar items in EconPapers) Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:agiwat:v:133:y:2014:i:c:p:24-33 DOI: 10.1016/j.agwat.2013.11.001 Access Statistics for this article Agricultural Water Management is currently edited by B.E. Clothier, W. Dierickx, J. Oster and D. Wichelns More articles in Agricultural Water Management from Elsevier |
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