CERES-Wheat模型分析山西省中部地区冬小麦需水量

摘要

Crop growth simulation model provides a new method for water resources analysis of farmland and optimization of management measures for water use efficiency improvement in crop production.The characteristics of annual variation of simulated yield,evapotranspiration,plant transpiration,soil evaporation,and water productivity of winter wheat in Jinzhong area in the North China Plain during 2010-2015 were analyzed using a calibrated CERES-Wheat model.The results showed that the amount of field evapotranspiration model of winter wheat growing season prediction was accurate.The average rainfall was deducted from the average EP,the average water demand for the green stage,jointing stage,grain filling stage were 250,310,343 mm,respectively.%以2010-2015年6个完整小麦生育期的田间试验数据为材料,采用情景分析方法,运用CERES-Wheat模型分析了晋中地区冬小麦需水量与产量的关系以及小麦蒸散量、土壤蒸发量与产量的关系,比较不同生育期需水量和产量的最佳预测模型.结果表明,该模型对冬小麦生长季的大田蒸散量预测较为准确;晋中地区小麦生长期灌溉水和土壤水的需要量为318 mm;在计算山西省中部地区多年平均蒸散量值和降雨量差值的基础上得出,该地区小麦返青期、拔节期和灌浆期小麦平均需水量分别为250,310,343mm.