冬小麦冬前旺长类型及形成相应类型的积温条件

Prosperous Types of Winter Wheat before Winter and Accumulated Temperature Conditions Corresponding to the Types

利用济宁市1987～2007年连续20年气象资料及小麦冬前生长发育资料，对济宁市20年来小麦不同年份发生的冬前旺长表现进行了连续观察和系统分析。结果表明：济宁市冬小麦冬前旺长分营养型旺长、生殖型旺长和重叠型旺长3种类型。形成营养型旺长的积温条件是冬前大于12℃的营养生长积温偏高所致；形成生殖型旺长的积温条件是冬前0～12℃穗分化积温偏高所致；形成重叠型旺长的积温条件是冬前营养生长积温和穗分化积温共同偏高所致。

With the 20 years＇meteorological data and the growth date of the winter wheat from 1987 to 2007 in Jining, we made a continuous study and systematic analysis on the overgrowth before winter in different years. The results showed that the exuberantly growth of the winter wheat before winter was divided into three types：the vegetative, the reproductive and the overlapping. The conditions which led to the vegetative one is the high accumulated temperature,more than 12℃ before winter, in vegetative growth ;the reproductive one is the high accumulated temperature,between 0℃ and 12℃ before winter,on the spike differentiation; the overlapping one is both of the two conditions of above.