东北地区是我国最重要的春播大豆产区，维持东北大豆高产稳产，减轻干旱危害，对保障国内大豆供给和国际贸易秩序具有重要意义。本研究拟以东北大豆主产区为研究区，利用大豆生长发育和气象观测资料，基于农田水分供求平衡，分析大豆干旱时序特征；通过水分控制试验，研究大豆水分关键期不同程度和不同持续时间干旱条件下的生长发育和产量响应，确定不同时序干旱受损指标；结合气候分析、天气预报，建立基于当前水分和未来不同时间尺度降水的天气—土壤干旱风险预警模型和预警指标；基于大豆苗情、遥感资料对作物干旱进行实时宏观诊断；基于WOFOST作物模型，模拟大豆生长发育和产量形成，获得大豆干旱监测评估指标；综合多源信息进行协同诊断，为东北地区大豆干旱诊断和合理灌溉提供科学依据，也为其他作物干旱预警提供可行的研究方法参考。

Northeast is the most important soybean production regions in China. To maintain high and stable yield of soybean in the Northeast and reduce the drought damage, is very meaningful for protecting the domestic soybean supply and international trade order. This study intends to Northeast soybean production area as the study area, use the growth observation data of soybean and meteorological data, based on the farmland water supply and demand balance, to analysis the temporal characteristics of soybean drought; through the experiment of water stress, study the response of soybean growth and yield during the key period of water on different levels and duration of drought conditions, determine of soybean drought damage index of different time series; combined with the analysis of climate and weather forecast, establish the weather-soil drought risk early warning model and index based on the current soil moisture and different time scales rainfall in the future; based on soybean growth monitoring and RS data, diagnose the crop drought on real-time; based on WOFOST, simulate the soybean growth and yeild on real-time by using the climate and weather forecast, get the comprehensive soybean drought index; use multi-source information to diagnose the soybean drought effect. It provides scientific basis for soybean drought diagnosis and reasonable irrigation in Northeast China, and also provides research methods reference for other crops drought early warning.