关键词: 小麦越冬期, 旱灾, 成因, 德州

Abstract: There was serious drought in Dezhou in 2008/2009,however the precipitation of 2008/2009 was less than the average level from wheat seeding to the beginning of wheat over-wintering,and slightly more than the average level in wheat over-wintering stage.In this paper,the reasons of drought were found based on the comprehensive analysis of the meteorological data and the information about disaster and wheat seedling.The result showed that the lack of precipitation was the direct reason of drought,and that warming temperature and rapid cold in warm winter and improper measures of agricultural production led to an increase in the severity of drought.The analysis of the reason of drought helps improving the measures of agricultural production,and the capability of agricultural to withstand natural disasters could be improved.

Key words: Over-wintering stage, Drought, Origin, Dezhou