The canopy structure and canopy radiation of a monsoon evergreen broad leaf forestis described at 7 aspects in Dinghushan biosphere reserve.The results show:1. The leaf area index of the community is 17. The vertical distribution of leaf area indexand canopy radiation decreases from top to bottom, and the radiation through the forestcanopy follows extinction law. 2. The main distribution range of leaf angles is 45°-70° in theupper layer of the canopy, 5°-35°in lower layer. So higher leaf area index is relat...