气候变暖对临汾尧都区冬小麦适宜播种期的影响分析

为了在气候变暖的情况下确定临汾尧都区冬小麦的适宜播种期，使冬小麦减少冻害，形成壮苗。应用临汾尧都区1981—2010年近30年日平均气温资料及冬小麦生育期观测资料，采用相关分析等数理统计方法对比分析气候变暖对冬小麦播种期的影响。结果表明，在选择适宜品种的基础上，临汾市尧都区冬小麦的适宜播种期为9月27日—10月8日，即秋分后半段到寒露之间，如果早于9月27日，易造成冬前旺长；晚于10月8日，易形成冬前弱苗，不利于越冬。

Analysis of the Impact of Climate Warming on Suitable Seeding Time of Winter Wheat in Yaodou Area, Linfen

In order to did some research to ensure the suitable sowing period of winter wheat in Yaodu District, Linfen under the background of climatic warming, which aims to protect winter wheat from freeze injury and help them form seeding. According to the meteorological observation data and the winter wheat observation data before winter from 1981 to 2010 in Yaodu District, Linfen, the author compared the effects of climatic warming on sowing period by using correlation analysis and other statistical methods. The results showed that on the basis of selection of suitable varieties, the suitable sowing period was from September 27th to October 8th in Yaodu District, Linfen; that was, the second half to dew. Before September 27th, it＇ s easy to cause the exuberant growth before winter. After October 8th, it＇ s easy to form weak seedling before winter and it＇ s not conducive to winter.