Abstract:Measurements of environment of solar radiation energy components were madeon Heshan (Guangdong Province) hillslope ecosystem in lower-subtropics. The major resultsare as follows: 1. The amount of gross solar radiation reaching the canopy layer was4775.2MJ m-2a-1, in which the diffuse radiation was 1441.1M m-2a-1, and the direct radiationwas 3134.1 MJ m-2a-1. 2. The seasonal changes of solar radiation and the direct radiationwere double-peak curve. The monthly maximum value appeared in May and August, andthe...