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我国目前保存较好的热带天然林（包括热带原始林、结构良好的天然更新林，而不包括疏林、残次林、灌木林等）面积约１１８７万ｈｍ２，其中云南南部约有６０万ｈｍ２，海南中南部山区约有５８７万ｈｍ２。在过去的４５年中，我国的热带原始林面积减少了５０％（约１１０ｈｍ２）。在海南岛尖峰岭的实例结果表明，热带原始林的生态系统的Ｃ素库为３４２ｔ／ｈｍ２（其中，森林群落Ｃ素库为２３４ｔ／ｈｍ２，土壤为１０５ｔ／ｈｍ２，凋落物层为３ｔ／ｈｍ２），系统每年净固定ＣＯ２量为１３３６ｔ／ｈｍ２，折合Ｃ量为０３７３ｔ／ｈｍ２；热带天然更新林生态系统每年净固定ＣＯ２量为７２１３ｔ／ｈｍ２，折合成Ｃ量为１９７ｔ／ｈｍ２。在我国现有的热带天然林生态系统中，森林植被层的Ｃ素库为１４４８亿ｔ，土壤中的Ｃ素库为１４２２亿ｔ，与植被层Ｃ库相当。在减少的热带森林中，Ｃ素库减少了约２２３１亿ｔ、ＣＯ２净同化量减少了０１８３亿ｔ，其经济损益高达２２００亿元。最后从森林与ＣＯ２的关系方面探讨了热带林可持续经营的问题。
At present, the area of tropical natural forests (including tropical virgin forests and well-structured natural regeneration forests, excluding sparse forests, secondary forests, shrubberies, etc.) currently well preserved in China is about 1.187 million hm2, of which about 60 Wan hm2, south central and southern mountains of Hainan about 58700 hm2. In the past 45 years, the area of tropical virgin forest in our country has been reduced by 50% (about 110hm2). The result of Jianfengling in Hainan Island shows that the C prime pool of the tropical primary forest ecosystem is 342t / hm2 (in which, the C pool of forest community is 234t / hm2, the soil is 105t / hm2, the litter layer is 3t / hm2 ), The net annual fixed CO2 amount is 1336t / hm2 and the equivalent C amount is 0373t / hm2. The annual net fixed CO2 amount of tropical natural regeneration forest ecosystem is 7213t / hm2, which is equivalent to 1% of C amount. 97t / hm2. In China’s existing tropical natural forest ecosystem, the C layer of forest vegetation layer is 148.4 million tons, the C-layer of soil is 122.2 million tons, which is equivalent to the C layer of vegetation layer. In the reduced tropical forests, the C-stocks decreased by 233.1 million tons, the net CO2 assimilation decreased by 183.13 million tons, and the economic profit and loss reached as high as 220 billion yuan. Finally, the issue of sustainable management of tropical forests is discussed from the relationship between forests and CO2.