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《ACTA ECOLOGICA SINICA》 1996-02
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STUDY ON CANOPY STRUCTURE AND CANOPY RADIATION OF MONSOON EVERGREEN BROAD LEAF FOREST IN DINGHUSHAN BIOSPHERE RESERVE, GUANGDONG

Ren Hai;Peng Shaolin;Zhang Zhuping;Zhang Wenqi(South China Institute of Botany, Academia Sinica,Guangzhou, China, 510650 )  
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 relative to standing position of leaf. 3. Canopy radiation influences branch angle, brance height and the leafdistribution pattern of branch. 4. Orientation of leaf and branch is random. 5. The leaf sizefrom top to bottom of community increases. This pattern benefits the forest productivity. 6.The top layer canopy is not continuous, but canopy in the centre is continuous. This structureis helpful to absorption of radiation, so the reflectivity is low with 3. 15 % annually. 7. The individual structure is different from community structure. Radiation environment can changethe individual structure, further influencing community productivity.
【Fund】: 中国科学院重点之重项目国家重大、重点基金
【CateGory Index】: S718.542
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