海南岛农业气候生产力的估算

发挥气候资源的生产潜力,是农作物增产的有效途径。本文用Lieth法估算海南岛的农业气候生产力。光、热、水资源丰富的海南岛,植物的气候产量高,农作物的增产潜力至少为现在生产水平的一倍以上。水分是海南岛(尤其是西南部)农业产量的主要限制性因子。通过灌溉来补充所欠缺的水分(全岛平均每公顷需灌溉1778吨水),可期望达到最大气候产量。 

ESTIMATE OF AGROCLIMATIC PRODUCTIVITY OF HAINAN ISLAND

To make the most of productive potential of climatic resources is an effective way to raise the yield of agricultural crops. The present paper applied the method of Leith's to estimate the agroclimatic productivity of Hainan Island. It was indicated that the light, heat and water resources are abundant and the climatic yield of plants are high too in Hainan Is-land. Thus, the potential of crop yield per unit can increase to more than two times as much as present level. However, water is the principal limited factor on the agricultural production of Hainan Island. If the maximum climatic yield is to be achieved irrigation is needed to supplement the deficiency of water in the whole Island, especially the western and southern parts. It needs, on an average, 1778 tons of water per hectare in the whole Island.