一、导论随着世界经济的飞速发展,对木材的需求量日益增加,导致世界森林资源急剧下降,特别在发展中国家,森林剧减导致的生态后果日趋严峻,木材供需矛盾日益尖锐,迫使各国将越来越多的投入用于发展人工林,以解决各自面临的生态和经济问题。中国是一个少林国家,经济发展对木材的需求以及人类对保护生态环境的呼声日益强烈,迫使中国政府早在50、60年代就进行了大规模的人工造林,时至今日,中国已发展了世 I. Introduction With the rapid development of the world economy, the demand for timber is increasing day by day, leading to a sharp decline in the world’s forest resources. Particularly in developing countries, the ecological consequences caused by the dramatic reduction of forests have become increasingly acute and the contradiction between supply and demand of timber has become increasingly acute, forcing countries More and more inputs will be devoted to the development of plantations to address their ecological and economic problems. China is a Shaolin country. The demand for timber for economic development and the increasing human demand for protecting the ecological environment have forced the Chinese government to carry out large-scale afforestation as early as the 1950s and 1960s. As of today, China has developed the world