辽宁省冬小麦种植北界研究

Study on Northern Boundary of Winter Wheat in Liaoning Province

以辽宁省 1991～ 1999年冬小麦地理播种的田间试验观测资料和气象观测资料为基础 ,系统研究了冬小麦的种植界限北移问题。运用灰色关联分析方法 ,获得影响冬小麦种植的主要气候因子是越冬前活动积温。通过对越冬前活动积温系统分析 ,得到了气候保证率达 80 %以上的辽宁省冬小麦种植北移界限 ,并利用负地积温指标进行了验证。

Based on geographic planting data of winter wheat during 1991～1999 and meteorological data, the climatic northern boundary of winter wheat in Liaoning province was studied systematically The accumulated temperature before overwintering was the key climate factor influenced the cropping of winter wheat by the analysis of grey correlation The northern boundary of winter wheat in Liaoning province in the rate of 80% climatic guarantee was obtained by analysis of the accumulated temperature before overwintering The results were verified by using the indices of the negative ground temperature