河南省气候变化及其对冬小麦越冬期的影响

Climate Change and its Impacts on Duration of Winter Wheat Overwintering Stage in Henan Province

选取河南省30个农气观测站1979-2007年的冬小麦越冬期资料和1957-2007年的气候资料,利用线性回归方法分析了河南省气候变化的趋势,结合样条插值法绘制了各因素变化倾向率的分布图。结果表明,分析期河南省大部分地区冬小麦越冬期天数呈缩短趋势,但郑州、封丘、许昌一带略有延长的趋势;全省范围内越冬期≥0℃积温、总日照时数变化倾向率与冬小麦越冬期天数变化倾向率有较高的相关性,越冬期≥0℃积温增加,总日照时数减少会导致冬小麦越冬期天数缩短。

Based on the data of the winter wheat over -wintering stage from 1979 to 2007 and climate data of 30 meteorological stations from 1957 to 2007 in Henan Province, the trends of the climate change were analyzed by using linear regression and the trend maps of each climate factor drawed by Spline. The results showed that the duration of overwintering stage became shorter in the most areas of Henan Province, but in the areas of Zhengzhou, Fengqiu and Xuchang ,the duration presented a slightly prolonging trend. The accumulated temperature above 0℃ and the sunshine hours had close relationships with the duration of the over - wintering stage. The increased accumulated temperature above 0℃ and reduced sunshine hour might shorten the duration of the over-wintering stage.