Applicable evaluation of crop model AquaCrop for summer maize production in Loess Plateau Region
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Key Words: AquaCrop model  summer maize  yield  biomass  evapotranspiration  crop productivity
倪 玲 西北农林科技大学水土保持研究所 陕西 杨凌 712100 
冯 浩 西北农林科技大学水土保持研究所 陕西 杨凌 712100 西北农林科技大学中国旱区节水农业研究院 陕西 杨凌 712100 
任小川 陕西省咸阳市乾县农村经济经营管理站 陕西 咸阳 712100 
郝志鹏 莱阳市水利局 山东 莱阳 265200 
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      In order to evaluate its applicability of crop model AquaCrop in Loess Plateau Region, the model parameters were revised and validated based on the summer maize parameters recommended by Hsiao et al. The biomass in the maize growing season, the change procedure of evapotranspiration, harvest yield and aboveground biomass in 2003, 2004, 2005, 2007, 2008 and 2010 in Changwu Region of the Shaanxi Province have been simulated, and carried out the comparison and analysis for the simulated with measured data. The results were showed that: In the six years, the adjusted determination coefficient Adj.R2 for simulated yield data and measured yield data was 0.9270, the relative error was between -2.479 to 11.182. The Adj.R2 for simulated and measured aboveground biomass was 0.7842. In this model, the effect of simulating yield was better than the aboveground biomass. In 2005 and 2008, the Adj.R2 for simulated and measured evapotranspiration were 0.6229 and 0.7973, respectively. Therefore, this model has a good simulation effect and important significance for the next optimal water management of summer maize in Loess Plateau Region.