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海南岛位于北纬18°09′—20°11′,东经108°36′—111°04′之间,是我国仅次于台湾的第二大岛。面积为33600平方公里,约合5033万亩。地势中高周平,其结构自内向外,由山地、丘陵盆地、台(阶)地平原、滨海沙滩过渡,呈不对称的环状分布。山地占全岛面积的24.7%,丘陵占10.3%,台(阶)地占53.6%,平原占8.2%,沙荒占2.3%。海南岛年平均气温在23°—26℃,即使在一月份,除中部山区及北部平原外,平均都在19℃以上,并不存在真正的冬季。全岛各地≥10℃的年积温超过8000℃。全年雨量多数地区在1400—(?)000毫米之间,水热条件十分优厚,是我国发展热带林业的一个重要基地。
Located between latitude 18 ° 09’-20 ° 11 ’and longitude 108 ° 36’-111 ° 04’E, Hainan Island is the second largest island next to Taiwan in China. An area of 33,600 square kilometers, about 50.33 million mu. The terrain is medium to high level, and its structure from the inside to the outside, from the mountains, hilly basins, Taiwan (plains) plains, beach sand transition, was asymmetric ring distribution. The mountainous area occupies 24.7% of the island area, the hills occupy 10.3%, the terrace area occupies 53.6%, the plain area accounts for 8.2% and the desertification area accounts for 2.3%. The average annual temperature of Hainan Island is 23 ° -26 ℃. Even in January, except for the central mountainous area and the northern plain, the average temperature is above 19 ℃, and there is no real winter. Over the island ≥ 10 ℃ annual accumulated temperature of more than 8000 ℃. Annual rainfall in most areas in the 1400 - (?) 000 mm between the water and heat conditions are very generous, is China’s development of tropical forestry is an important base.