Light Distribution in Crop-tree Intercropping Area and its Agricultural Value
林农间作的光照分布特点与农业意义

In this paper based on the analysis of the daily temporal and spatial variations of the shady area and the shading intensity of a single tree in intercropping area,the features of the total relative sunlight distribution in crop-Paulownia intercropping field were studied.The shading effects and practical agricultural value of three structural patterns of tree-row were also discussed.It was found that Paulownia as intercropping tree has greater potential for agricultural production because of its small shady stress on crops.