| 康燕霞,蔡焕杰,王健,丁端锋.夏玉米日蒸发蒸腾量计算方法的试验研究[J].干旱地区农业研究,2006,(2):110~113 |
| 夏玉米日蒸发蒸腾量计算方法的试验研究 |
| A study on calculation method of diurnal evapotranspiration of summer corn |
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| DOI：10.7606/j.issn.1000-7601.2006.02.24 |
| 中文关键词: 波文比能量平衡 蒸渗仪 蒸发蒸腾量 日变化 |
| 英文关键词:Bowen ratio-energy balance lysimeter evapotranspiration diurnal course |
| 基金项目:高等学校博士点基金(20020712020)； 高校青年教师奖资助项目 |
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| 中文摘要: |
| 根据实测资料,对波文比计算的蒸发蒸腾量和蒸渗仪实测的蒸发蒸腾量日变化进行比较及分析。结果表明,波文比所测蒸发蒸腾量与太阳净辐射的相关性比较好,蒸渗仪所测值与太阳净辐射的相关性不明显。蒸发蒸腾量的日变化曲线呈单峰型,早晚小,中午大,夜间为负值。蒸渗仪受自身因素影响,变化比较敏感。两种方法计算平均值比较接近。波文比的计算值比蒸渗仪的测量值更能精确地反应短时段作物的蒸发蒸腾规律。 |
| 英文摘要: |
| Based on the experimental data from cornfields, this paper compared the daily change of evapotranspiration calculated by Bowen ratio-energy balance and that calculated by lysimeter.The results showed that the evapotranspiration calculated by Bowen ratio was highly related to solar radiation, but that calculated by lysimeter was not evidently related to solar radiation.The diurnal variation curve of evapotranspiration showed the single apex type, it was high in midday, low in the morning and evening, and minus in the night.The results of lysimeter were sensitively affected by its own factors.It was ideal to use the average value of the two methods.The calculated value of Bowen ratio was more accurate than the measured value of lysimeter in describing the evapotranspiration rule of crops in short period. |
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