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Position: Home > Articles > Analysis of Precipitation Change Trend during Key Water Requirement Periods of Winter Wheat in Heibei Plain Water Saving Irrigation 2009 (11) 12-15+18

河北平原冬小麦需水关键期降水变化特征

作  者：
龚宇;花家嘉;高桂芹;王璞
单  位：
河北省气象与生态环境实验室;唐山市气象局;中国农业大学农学与生物技术学院
关键词：
冬小麦;需水关键期;降水变化;河北平原
摘  要：
利用1957-2006年河北平原3个生态类型区冬小麦生长期内逐日降水资料,采用统计学和小波变换方法,分析了冬小麦需水关键期和全生育期内降水特征和短期变化趋势。结果发现:3个生态类型区冬小麦各生育期降水变率都很大,自然降水不能满足生长需水,但3个区的缺水状况和今后短时期降水量有一定的差异。拔节-孕穗期平均缺水80.1~84.8 mm,抽穗-乳熟期平均缺水184.9~203.3 mm,全生育期平均缺水362~388 mm;近20年内除山前平原区冬小麦全生育期进入降水偏少期外,其余2个生态区均进入降水偏多期。
译  名：
Analysis of Precipitation Change Trend during Key Water Requirement Periods of Winter Wheat in Heibei Plain
作  者：
GONG Yu1,HUA Jia-jia1,GAO Gui-qin1,WANG Pu2(1.Tangshan Meteorological Bureau,Tangshan 063000,Hebei Province,China;2.College of Agronomy and Biotechnology,China Agriculture University,Beijing 100094,China)
关键词：
winter wheat;key water requirement periods;change of precipitation;Heibei Plain
摘  要：
Using the precipitation data during the growth stage of winter wheat in three ecological zones in Hebei Plain from 1957 to 2006,applying the methods of statistics and wavelet transform,the trend of precipitation and its short-term change during the period of water-crucial stage and growth stage are investigated,respectively.The results indicate that the amount of precipitation during the period of growth stage in three ecological zones varies greatly,and the natural precipitation can not meet the need for the growth of winter wheat.Some specific differences also exist in lacking water condition and short-term change.On average,the water-lacking amount is 80.1~84.8 mm at Jointing-booting stage and 184.9~203.3 mm in heading-milk stage.The total water-lacking amount in whole growth period is 362~388 mm.In lately 20 years,among the three ecological zones,two of them have entered rain-sufficient period,while one ecological zone(namely Shan Qian Plain Zone) is still in rain-insufficient period.

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