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Evapotranspiration and Ratio of Soil Evaporation to Evapotranspiration of Winter Wheat and Maize

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Abstract:

Evapotranspiration (ETc) is an important quantity for hydrological cycle. This study shows evapotranspiration, the ratio of evaporation to evapotranspiration (E/ETc) of winter wheat and maize in north China. Several relationships, namely, E/ET0 and soil surface moisture, E/ET0 and leaf area index (LAI), are also analyzed. The average seasonal ETc values for winter wheat, maize (2008) and maize (2009) are 431.21, 456.3 and 341.4mm. The value of E/ET0 varied from 1 at initial growth stage to 0.295 at the later growth for winter wheat, and from 1 to 0.492, from 1 to 0.566 for maize (2008) and maize (2009). The relationship between E/ET0 and surface soil water content, and E/ET0 and LAI are fitted to a quadratic parabola equation with significant correlation coefficients, respectively, for wheat and maize. These results should help the precise planning and efficient management of irrigation for these crops in this region.

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Periodical:

Applied Mechanics and Materials (Volume 539)

Pages:

832-837

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.539.832

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Online since:

July 2014

Authors:

Zheng Wei*, Yu Liu, Di Xu, Jia Bing Cai

Keywords:

Evapotranspiration, Maize, Soil Evaporation, Surface Soil Water Content, Winter Wheat

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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