中文摘要：

依据我国东北101个气象台站的多年逐日资料,并结合农作制实地考察,采用数理统计方法对东北地区气候资源演变进行了系统分析。结果表明:近50年来东北地区光、热、水资源的时空布局发生了明显变化。年均温递增显著,夜间温度升高突出;年降水总量变化不明显,而降水天数减少,日降雨强度明显增加;年总辐射量呈现下降趋势,尤其是光照时数。大量资料分析表明:该区长期的不良耕作方式导致耕层日益浅化、紧实,犁底层加厚;土壤有机质呈显著下降趋势,土壤质量退化严重;土壤蓄水保肥能力差,农田抗逆能力下降。针对东北气候资源演变特征和现代农作制发展趋势,就东北农作制对未来气候模式的应对策略提出了一系列建议。

英文摘要：

The present study systematically analyzed the evolution of climatic resources in Northeast China,employing daily weather data from 101 meteorological stations in combination with mathematical statistical methods and field survey.Results showed that the spatial-temporal distribution of climatic resources(e.g.,water,thermal resources,and solar radiation)in Northeast China has changed pronouncedly over the past 50 years.The accumulated temperature above 10 ℃ and mean minimum temperature increased markedly.The ...