The arrangement form of trees in agrisilvicultural system is defined by varied tree spacing as intercropping, alley cropping and hedgerow. Shading each other among trees and between rows alters distinctly with the age, spacing and biological periodism of trees and sea son change all year round. RTS and PAR variances throughout the year can be roughly divided into three periods of no shading effect (RTS over 80%), light shading effect ( RTS be tween 40% and 80%)and thick shading effect ...