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水分在海南岛的农业生产中占有重要的地位。本文用桑斯维特的气候区方法计算了海南岛水分收支,包括降水量、可能蒸散量、实际蒸散量、水分亏缺量、水分盈佘量、湿润指数和11—4月干燥指数。分析得出:海南岛的水分条件有东西、高低的分布规律,水分条件以中部山区和东部最为丰富、北部台地次之、西部最差;全岛雨旱两季分明,水分收支年际间变化大。建议在西部地区应发展一定面积的耐旱果菜和耐旱作物;在宜胶地区可继续发展一定面积的橡胶园;广泛营造森林及进一步完善灌溉设施。
Water plays an important role in agricultural production in Hainan Island. This paper calculates the water budget of Hainan Island, including precipitation, possible evapotranspiration, actual evapotranspiration, water deficit, moisture content, wetting index and dry index in November-April, using the Sanshit’s climatic zone method. The analysis shows that there are some things in the water conditions in Hainan Island. The distribution of water content in Hainan Island is the most abundant in the mountains and the eastern part of the central part, followed by the northern platform and the worst in the west. The rain and drought in the whole island are distinct in two seasons, huge change. It is suggested that a certain area of drought-tolerant fruits and vegetables and drought-tolerant crops should be developed in the western region; rubber plantations of a certain area should continue to be developed in the Yi Rubber Region; forests should be extensively constructed and irrigation facilities further developed.