北京冬小麦各生育期灌水量辅助决策模型研究

Study on the Assistant Decision Model of Irrigation in Growth Period of Winter Wheat in Beijing

北京地区冬小麦不同生育期的需水量不同,灌溉量会影响冬小麦播种、生长和收获质量及产量。利用专家咨询法和文献查询法,得到北京冬小麦各生育期土壤湿度的致死下限、较适宜下限、最适宜、较适宜上限、致死上限值及其权重。利用Matlab进行数据拟合,得到冬小麦各个生育期土壤湿度适宜度模型。在了解北京有效降水量及小麦各生育期需水量这些数据的基础上,利用北京冬小麦各生育期灌水量辅助决策模型对其各生育期灌水量进行改良。以冬小麦各个生育期土壤湿度适宜度模型为基础,研究建立北京冬小麦各生育期灌水量辅助决策模型。

Water requirement of winter wheat in Beijing district varies in different growth stages,irrigation vol-ume affect the sowing,cultivation and harvest of winter wheat.With consultation of experts and data of historical lit-eratures,critical parameters about soil humidity for each growth stage of winter wheat were obtained,such as Beijing all growing stage of winter wheat soil moisture lethal limits,suitable lower limit,the most suitable,suitable limit,le-thal limit 5 point values and weights of these five points.After data fitting operated by Matlab,fitness model of soil humidity in each growth stage of winter wheat was provided.With well understanding of effective precipitation in Beijing and water requirement of winter wheat,refined irrigation volume for winter wheat of different growth stages was made with the help of irrigation assistant decision model.fitness model of soil humidity in each growth stage of winter wheat was applied as basic data,a irrigation assistant decision model of winter wheat in Beijing was built.