A STUDY OF THE LIGHT ENERGY RESOURCE UTILIZATION RATE OF THE TROPICAL AGRICULTURE IN HAINAN ISLAND
海南岛热带农业光能资源利用率研究

Through the physiological function of energy transformation of green plant, i.e., the internal relation of influx, transformation and output of solar energy in photosynthesis, this paper describes quantitatively for every locality of Hainan Island the actual light energy utilization rate (ALEUR), the potential light energy utilization rate(PLEUR), the absolute difference of the two parties(DTP), and the regional agricultural production potential (APP). The results indicate that the ALEUR of the island is lower than the averge level of the whole nation, being only a half of that of regions of two crops a year. For the high value regions in ihe island the ALEUR is close to that of regions of one crop a year.The difference of the PLEUR between Hainan Island and other tropical regions of the world is not great. The average DTP in the island reaches 5.1%, and therefore, the production potential here is relatively high.According to actual conditions, this paper also probes into the main causes of the low level of the LERUR in the island and fhe corresponding ways to increase it. It is expected that this will provide a guide or some reference for the agricultural production in Hainan Island.