| 河北省冬小麦生育期蒸降差的时空变化及其原因分析 |
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| 引用本文： | 康西言,李春强,高建华,王鑫.河北省冬小麦生育期蒸降差的时空变化及其原因分析[J].中国农业气象,2010,31(2):261-266. |
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| 作者姓名： | 康西言 李春强 高建华 王鑫 |
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| 作者单位： | 河北省气象与生态环境重点实验室/河北省气象科学研究所,石家庄,050021 |
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| 基金项目： | 河北省应用基础研究计划重点基础研究项目(08966711D); 河北省气象局科研开发项目(08ky14) |
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| 摘 要： | 冬小麦生育期蒸降差是制定灌溉计划的重要依据,了解其时空变化及影响因素,可以为水资源高效利用提供参考。利用河北省冬麦区1965-2007年48个地面气象站资料,根据FAO推荐的Penman-Monteith公式,分析了河北省冬小麦生育期蒸降差的时空变化及其与气象要素的关系。结果表明:河北省冬小麦生育前、中、后期各站蒸降差均为正值,表明全生育期水分亏缺;生育中期的水分亏缺最严重,且变率较小;水分亏缺最大的区域位于河北省东南部地区。随着气候变化,各生育期蒸降差均为减少趋势,其中全生育期和后期的减少趋势明显(P0.01),前期和中期的减少趋势不显著;全生育期蒸降差的变率较小。相关分析表明:引起冬小麦全生育期蒸降差减少的气象原因主要是日照时数减少和风速下降,最低气温对其有一定影响,但不起决定作用。
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| 关 键 词： | 冬小麦 蒸降差 时空变化 水分亏缺 变化趋势 |
Analysis on the Temporal-spatial Variations of Differences between Evapotranspiration and Precipitation(DEP)During the Growth Period of Winter Wheat in Hebei Province |
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| KANG Xi-yan,LI Chun-qiang,GAO Jian-hua,WANG Xin.Analysis on the Temporal-spatial Variations of Differences between Evapotranspiration and Precipitation(DEP)During the Growth Period of Winter Wheat in Hebei Province[J].Chinese Journal of Agrometeorology,2010,31(2):261-266. |
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| Authors: | KANG Xi-yan LI Chun-qiang GAO Jian-hua WANG Xin |
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| Institution: | (Hebei Key Laboratory for Meteorology and Eco-Environment/Meteorological Sciences Institute of Hebei Province,Shijiazhuang 050021,China) |
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| Abstract: | Evapotranspiration and precipitation are two main parameters during the growth period of winter wheat and also important for irrigation planning. Based on the climate data of 48 weather stations throughout the winter wheat areas of Hebei Province from 1965 to 2007 and Penman-Monteith equation recommended by FAO,the Differences between Evapotranspiration and Precipitation (DEP) during the growth period of winter wheat and its temporal-spatial variations and the relationships with meteorological factors were ... |
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| Keywords: | Winter wheat Differences between Evapotranspiration and Precipitation(DEP) Temporal-spatial variations Water deficit Trend analysis |
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