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海南岛缺煤,石油未被利用,木材仍为最主要的能源,且需要量相当大。世界木材采伐量中将近一半用作薪材,不发达的国家,90%的人口以木材为能源,薪材占木材消费量的80%,这样每年消耗的薪炭材约占其森林年生长量的70%。发达的国家,每年薪炭材的需要量仍占森林年生长量的30——40%。海南岛现有人口约528万人,若以三分之二的人口烧柴,按每人每年烧柴360公斤计算(约0.38立方米),全岛每年消耗薪炭材约127万吨(127万立方米),相当于全岛年产木材20万立方米的六年多的生产任务。岛上现有天然林约460万亩,每亩森林的年生长量按0.2立方米计,则总生长量为92万立方米,不足于全区每年薪炭材的需要
Hainan Island is short of coal and oil is not utilized. Timber is still the most important energy source, and the demand is quite large. Almost half of the world’s timber harvest is used as fuelwood, while in underdeveloped countries, 90% of the population is wood-based and fuelwood accounts for 80% of wood consumption, which accounts for about half the annual forest growth 70%. In developed countries, the annual demand for fuelwood still accounts for 30-40% of annual forest growth. Hainan Island has a population of about 5.28 million. If burning two thirds of its population, it will cost about 1.27 million tons of firewood (about 1.27 million tons) at a rate of 360 kilograms per person per year (about 0.38 cubic meters) Cubic meters), equivalent to an annual output of 200,000 cubic meters of timber in the island more than six years of production tasks. The island has about 4.6 million mu of natural forests, annual growth of forest per mu according to 0.2 cubic meters, the total growth of 920,000 cubic meters, less than the annual needs of the region’s fuel wood