据有关专家考察,当前世界造林技术发展有以下几个特点:一、生态林,能源林异军突起在全世界人工造林面积不断扩大的同时,温带的多数发达国家纷纷提出森林的多目的经营,以美国的趋势最为明显.美国把相当大面积的森林划为水源涵养林、国家森林公园及游憩林,象开发较早的美国东北部林区已不再是主要木材生产基地,其造林 According to the experts’ inspection, the current development of afforestation technology in the world has the following features: First, the sudden emergence of ecological forests and energy forests While afforestation areas in the world are constantly expanding, most developed countries in the temperate zone have proposed multi-purpose forest management, The most obvious trend is that the United States has delineated a considerable area of ​​forests as water conservation forests, national forest parks and recreational forests. As early as the northeastern United States, the forest areas no longer are the major timber production bases and the afforestation