本文通过绿色植物能量转化的生理机能,即光合作用过程中太阳能的投入、转化和产出的内在联系,定量地描述了海南岛各地实际光能利用率;地区性农业生产潜力;潜在光能利用率及其与实际光能利用率的绝对差值。结果表明,全岛实际光能利用率低于全国平均水平,只及一年两熟地区的一半,高值区接近一年一熟地区;潜在光能利用率与世界热带地区差距不大;潜在与实际光能利用率之差全岛平均达5.1％,具有较大的增产潜力。文中还针对海南的实际粗略地探讨了岛内光能利用率不高的原因和提高光能利用率的相应途径。

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.