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树木引种是将某个树种引到该树种自然分布范围以外的新地区种植,或将野生树种进行人工栽培。引种的目的是为了丰富当地树种资源,提高林业生产水平,实现林木速生、优质、丰产,增加经济效益。我国树木引种历史悠久,例如核桃及悬铃木早在西汉及东晋时就引进我国,桉树、刺槐于十九世纪末引进我国。本世纪初从外国引入我国南方的加勒比松、湿地松、火炬松及晚松等树种表现都较好,具有生长快、干形直、含脂量高、受松毛虫危害较轻等优点,在低山丘陵区种植优于当地马尾松,目前已在南方九
Introduction of trees is the introduction of a tree species to new areas beyond the natural distribution of the tree species or artificial cultivation of wild tree species. The purpose of introduction is to enrich the resources of local tree species, improve the level of forestry production, to achieve fast growing trees, high quality, high yield, increase economic efficiency. Introduction of trees in our country has a long history. For example, walnut and plane tree were introduced into our country as early as the Western Han and Eastern Jin dynasties. Eucalyptus and black locust introduced to China at the end of the 19th century. At the beginning of this century, the species of Caribbean pine, slash pine, loblolly pine and late-shrub introduced into the southern part of China from foreign countries performed well. They had the advantages of fast growth, straight dryness, high fat content and less damage by pine caterpillars. Hilly areas planted better than the local masson pine, is currently in the south nine