| 冬小麦冠层微气象特征及能量平衡的研究 |
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| 引用本文： | 韩笑,李永秀.冬小麦冠层微气象特征及能量平衡的研究[J].安徽农业科学,2010,38(30):17097-17100. |
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| 作者姓名： | 韩笑 李永秀 |
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| 作者单位： | [1]辽宁省本溪市气象局,辽宁本溪117000 [2]南京信息工程大学应用气象学院,江苏南京210044 |
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| 摘 要： | 目的]研究冬小麦冠层微气象特征及能量平衡。方法]利用孕穗期、抽穗开花期、灌浆期和成熟期等4个主要生育期内冬小麦冠层微气象观测资料，结合当地气象台站资料，研究了冬小麦群体冠层微气象特征的时空变化规律，并进一步分析了能量平衡的日变化和季节变化规律。结果]冬小麦冠层温度与空气温度的日变化均呈正弦式；不同高度空气温度不同，4个生育期中抽穗开花期温度最高。湿度日变化也呈正弦式；冠层中部的湿度最大，饱和差最低；抽穗开花期湿度最高。冠层上层风速呈较弱的单峰型日变化。冬小麦田的能量平衡存在明显的日变化和季节变化；净辐射呈单峰型日变化，感热通量灌浆期最高，抽穗开花期最低；潜热通量则在抽穗开花期最高，孕穗期最低。结论]该研究的结论为指导防灾减灾、提高小麦产量和品质提供科学的依据。
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| 关 键 词： | 冬小麦 冠层 微气象 能量平衡 波文比 |
Micrometeorological Characteristics and Energy Budget of Winter Wheat Canopy |
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| Institution: | HAN Xiao et al ( Benxi Meteorological Bureau of Liaoning Province, Benxi, Liaoning 117000) |
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| Abstract: | Objective]The aim was to study winter wheat canopy micrometeorology features and energy balance. Method]Usjng the canopy micrometeorological data and weather data of winter wheat at booting stage,heading and flowering stage,grain-filling stage and mature stage,the daily,seasonal and spacial variations of air temperature,air humidity,soil temperature were analyzed. The diurnal and seasonal variations of canopy temperature,wind speed and net radiation above the canopy were studied. Result]Winter wheat canopy temperature and air temperature daily variation showed sinusoidal current; the temperature in various height was different,the temperature in heading and flowering stage was highest. Humidity variation was also showed sinusoidal trend,the humidity in the middle of canopy was maximum. The energy balance in winter wheat field exists obviously daily variation and seasonal variation. Conclusion]The conclusion of this research supply references for agrometeorological disaster prevention and reduction,and helping in improvement of yield and quality of winter wheat. |
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| Keywords: | Winter wheat Canopy Micrometeorology Energy balance Bowen-ratio |
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