夏玉米潜热通量的变化规律研究

Study on Rule of the Latent Heat Flux Change in Maize Field

针对生态系统的辐射收支、热量平衡和蒸发蒸腾分配对系统的水分转化和有效利用研究,利用波文比自动气象站观测了夏玉米在不同生育时期、不同天气情况下潜热通量的日变化、逐日变化以及逐月变化过程。结果表明,潜热通量日变化曲线是典型单峰型,潜热通量和太阳净辐射的逐日变化曲线、逐月变化曲线吻合,阴天潜热通量的峰值滞后于晴天和多云。

Aiming at reasearch on the influence of radiation budget and thermal balance and the evapotranspiration distribution of ecosystem on its water transformation and utilization efficiency, it has been observed by the Bowen-ratio system about the diurnal change, daily change and monthly change of latent heat flux of summer maize under different grow- ing stages and different weather conditions. Results indicate that diurnal change curve of the latent heat flux is the typical Arabian curve, and daily change and monthly change curve between latent beat flux and net solar radiation is similar respectively, and the time when the maximum value occurs in cloudy sky lags on the time in other weather conditions.