冬小麦冠层温度及其影响因素探析

Analysis of the influence factors on winter wheat canopy temperature

采用涡度相关法测定冬小麦农田潜热通量和显热通量 ,研究农田热量平衡各分量及风速对冠层温度和冠层 大气温差的影响结果表明 ,净辐射通量是影响冠层温度高低的主要能量因子 ,二者呈极显著线性相关关系 (α =0 .0 1) ,潜热通量、显热通量和土壤热通量对冠层温度的影响与天气状况有关 ,风速变化对冠层温度的影响作用不显著 ,而与冠层

Latent heat flux and sensible heat flux in winter whea t field were measured by using the eddy covariance technique, and the effect of en ergy balance components and wind speed to canopy temperature and the canopy-air temperature difference were analyzed also. The results show that the net radiat ion flux is the main energy factor infecting canopy temperature, and there is a remarkable linear correlation between them(α=0.01). The effects of latent h eat flux, sensible heat flux, and ground heat flux on canopy temperature are rel ated to weather condition. Wind speed remarkably infects the canopy-air tempera ture difference, and there is a negative correlativity between them.