小麦冬前异常旺长对秋冬气候变暖的响应分析

Exceptional Prosperous Growing in Response to Warming in Fall and Winter before Winter

[目的]分析冬小麦冬前生长高度、叶面积指数和大蘖数对气候变暖的响应，为河南省冬小麦的安全越冬、安全生产提供重要依据。[方法]使用2006～2007年郑州农业气象试验田的地面平行观测资料，并利用Excel2000软件绘制图表，进行统计分析。[结果]11月平均气温≥6．5℃时，多年冬前小麦生长高度随气温的上升而明显增高；叶面积指数与≥5℃积温呈0．01水平显著正相关关系，积温每增加15℃，叶面积指数将提高0．1。[结论]为有效地应对气候变暖对冬小麦的负面影响，小麦播期应推迟4d左右。

[ Objective ] Growing height, leaf area index and big tiller number of winter wheat in response to the warm winter were studied in order to provide an important basis for the safety of ovetwintering in Henan Province. [ Method] Statistic analysis was made based on the paral- lel surface observation data of 2006 to 2007, and Excel 2000 software was used to draw diagrams. [ Result] When the average temperature in November was not less than 6.5 ℃, the growing height of fall wheat increased obviously with ascending temperature, and the leaf area index showed a significant positive correlation with the accumulated temberature above 5 ℃. And it would increase 0.1 with every addition of 15 ℃ accumulated temperature. [ Conclusion ] The seeding period should be postponed for about four days in order to reduce the negative effect of wanning climate.