摘要
利用廊坊市1965-2008年的常规气象观测资料,采用小波分析、降水距平百分率等方法,详细分析冬小麦全生育期需水量的年际变化、冬小麦不同生育阶段需水量与同期降水的关系,以及冬小麦干旱的特点,并且通过分析多年降水、气温和蒸发量的变化研究廊坊市干旱的气候特征。结果发现:冬小麦需水量具有缓慢减少的趋势,冬小麦各生育阶段均存在用水缺口,近年来在冬小麦生长后期干旱比较明显。降水量的减少,气温的上升,冬小麦生育期蒸发量大等因素,是造成廊坊市冬小麦干旱的主要气候因素。
Based on original meteorological observation data in Langfang Station during 1965-2008,inter-annual variation of winter wheat needing water in whole growth period,the relationship between needing water during different growth stages and precipitation,and characteristic of winter wheat drought are analyzed in detail by using wavelet analysis and rainfall anomaly percentage methods.And climate features of drought in Langfang city are researched through analyzing precipitation and temperature and evaporation for 44 years.The results show that: winter wheat needing water has decline trend slowly,water gap exists during different growth stages of winter wheat,and winter wheat drought in recent years is obvious during late growth period.Precipitation reduction,temperature rise,and large evaporation in growth period are main climate reasons why winter wheat drought of Langfang city occur.
出处
《中国人口·资源与环境》
CSSCI
北大核心
2010年第S1期469-472,共4页
China Population,Resources and Environment
基金
廊坊市科技局软科学研究项目(NO.2006050313)
关键词
冬小麦
需水量
干旱气候
winter wheat
needing water
drought climate
