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This article in SSSAJ

  1. Vol. 61 No. 1, p. 254-256
     

    * Corresponding author(s): Letey@ucrac1.ucr.edu
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doi:10.2136/sssaj1997.03615995006100010035x

Yield and Nitrogen Uptake Prediction by CERES-Maize Model under Semiarid Conditions

  1. X. P. Pang,
  2. J. Letey  and
  3. L. Wu
  1. Dep. of Soil and Environmental Science, University of California, Riverside, CA 92521

Abstract

Abstract

Quantitative relationships between N and irrigation management on crop yield and NO3 leaching is urgently needed for economical and environmental analyses. Validity of the CERES-Maize (version 2.10) model under arid conditions was evaluated for 3-yr irrigation and fertilizer management trials conducted at Davis, CA. The N was applied at rates of 0, 90, 180, and 360 kg N ha and irrigation amounts were 20, 60, and 100 cm. The slope of the regression line between measured and simulated grain yield was 1.003 with r2 = 0.936. The slope of the regression line between measured and simulated N uptake was 1.013 with r2 = 0.946. We concluded that the CERES-Maize model may be applied with confidence to study effects of N and irrigation management on corn (Zea mays L.) yield and N uptake under irrigated semiarid or arid conditions.

Research supported by California Fertilizer Research and Education Program.

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