Yield and Nitrogen Uptake Prediction by CERES-Maize Model under Semiarid Conditions
- X. P. Pang,
- J. Letey and
- L. Wu
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.
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