论文部分内容阅读
与温带地区相比,热带地区林木对碳的截留更快,这是由于其优越的气候条件所致。但是,热带地区成的净截留量远比实际碳的同化量要少,因为大部分的木材基本上作为燃料被消耗了。另一方面,利用木材制成的纸、纸浆和胶合板等耐用产品不会马上把吸收的碳归还大气。在温带,作为工业原材料的木材资源极为丰富,因此木材加工业大部分集中在这一地区,主要在西欧、斯堪的纳维亚和北美。在亚洲、非洲和拉丁美洲,尽管具有适宜树木生长的优越自然条件以及大面积尚未充分利用的土地,但它们仍然是木材产品净进口的地区。在不久的将来和远久的未来,由于各种各样的原因,对木材产品的需求率将显示猛增趋势。热带工业用材林不仅能使发展中国家成为新的木材加工基地以满足全球的木制产品需求,而且证实它能有效净减大气中CO_2含量且是经济上可行的途径。但是,这将需要改变土地利用政策以及对作为原材料的木材产品的管理法规,以促成在这一领域所需要的投资规模。
Trees in the tropics retain their carbon faster than in temperate regions due to their superior climatic conditions. However, the net interceptions in the tropics are far less than the actual carbon assimilation because most of the wood is essentially consumed as fuel. On the other hand, durable products such as paper, pulp and plywood made of wood do not immediately return absorbed carbon to the atmosphere. In the temperate zone, where wood is abundant as an industrial raw material, most of the wood processing industry is concentrated in the region, mainly in Western Europe, Scandinavia and North America. In Asia, Africa and Latin America, despite the superior natural conditions suitable for tree growth and the large area of underutilized land, they remain a net importer of timber products. In the near future and in the near future, demand for wood products will show a sharp increase in demand for a variety of reasons. Tropical industrial timber forests not only enable developing countries to become the new wood processing base to meet the global demand for wood products, but also prove that it can effectively reduce CO 2 content in the air and is an economically viable approach. However, this will require changing land-use policies and regulations governing timber products as raw materials to facilitate the investment needed in this area.