【摘要】 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。更多还原

【Abstract】 Water plays a very important role in agricultural production in Hainan Island. In this paper, the Island’s water budget, involving the precipitation, potential and actual evapotranspiration, water deficit and surplus, moisture index (Im)and dryness index (Ia) from November to April, was worked out on the basis of the climatic classification method developed by Thornthwaite. The results obtained indicate that: (1) The distribution of water assumes an east-west and high-low pattern in Hainan Island. The moisture conditions in the central mountainous area and the eastern part are the best, those in the northern tableland come second and those in the west are the worst. (2) Wet and dry seasons are very distinct throughout the Island, and the water budget is subject to a great change from year to year. It is therefore suggested: xerophilous fruit trees, vegetables and other crops be cultlyated over some area in the west; rubber trees be further planted in areas where they usually grow well; afforestation be widely promoted and irrigation facilities perfected.更多还原