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Integrated spatial–temporal analysis of crop water productivity ofwinter wheat in Hai Basin
| Title Of The Magazine | Agricultural Water Management |
| Year Information | 2014 |
| KeyWord | |
| Authors | Nana Yan, Bingfang Wu |
| Intro | Achieving higher yield per unit of water is one of the most important challenges in water-limited agri-culture. In this paper, crop water productivity (CWP) of winter wheat was calculated and analyzed inthe plain of Hai Basin in northeastern China. The average CWP of winter wheat (Triticumaestivum L.)in the basin for 2003–2009 was 1.049 kg m−3, with CWP values across the basin ranging between 0.7and 1.4 kg m−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 temporalanalysis showed increases in yield of between 100.4–211.4 kg ha−1year−1between 1984 and 2002 ateight agro-meteorological research stations across the basin without a corresponding increase in ET, cor-responding to an increase in CWP of 0.02–0.1 kg m−3per year. It was concluded that the improvementsin CWP have resulted from improvements in crop varieties and crop husbandry rather than reductionsin water consumption. |
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