冬小麦生育期有效降水量计算模式研究

Calculation Model of Effective Precipitation at Growth Stages for Winter Wheat

根据田间试验数据，建立了冬小麦叶面积指数随有效积温变化的增长模型，实际腾发量模型及土壤入渗模型。并以土壤水分平衡法为基础，综合考虑作物蒸散、降水和灌溉等因素影响，利用新乡地区1951～2001年冬小麦连续50个生长年度的逐日气象资料，模拟了各年度冬小麦生长期土壤水分供需状况。通过模拟结果分析冬小麦生长期降水量和有效降水量相互关系及变化趋势，确定了该地区不同时长尺度下冬小麦生育期有效降水量适宜计算模式，以满足区域农业发展规划及水资源优化配置管理的需求。

The leaf area index growth model, which changed with the accumulated temperature, actual evapotranspiration model and soil infiltration model, have been built up by field experimental data. Then based on Daily meteorological data of Continuous annual growth of winter wheat from 1951 to 2001 in Xinxiang area, with consideration of comprehensive effects of crop evapotranspiration, precipitation and irrigation, the status about soil water supply and demand at each annual growth period of winter wheat is simulated by soil water balance method, through the analysis on relationship and change trend between the precipitation and effective precipitation in growth period of winter wheat, effective precipitation calculation models under different time scale were given in Xinxiang area, which to meet the demand of regional agricultural development and water resources optimization management.