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华北落叶松(Larix principis—rupprechtir Mayr.)是我国北方的重要造林树种之一,主要分布于山西、河北两省。在我省境内,华北落叶松主要分布于关帝山、管涔山、五台山、恒山和太岳山等海拔1600—2700米山地,以1600—1900米分布最多。华北落叶松耐严寒干旱,生长迅速,材质坚硬,用途广泛,近年来日益受到重视,造林面积不断扩大。由于华北落叶松分布范围广,自然分布区内水平和垂直方向上,生态条件的差异非常大。分布区内不同地点的生态条件,长期以来对种群内大量发生的不定变异进行定向的选择和积累,结果在天然种群内分划出彼
Larix principis-rupprechtir Mayr. Is one of the important afforestation species in northern China, mainly distributed in Shanxi and Hebei provinces. In our province, Larix principis-rupprechtii is mainly distributed in the mountains of 1600-2700 m above sea level, such as Guandi Mountain, Guanju Mountain, Wutai Mountain, Hengshan Mountain and Taiyue Mountain, with the most distribution being 1600-1900 meters. Larix principis-rupprechtii can tolerate cold and drought, rapid growth, hard material and wide range of uses. It has been paid more and more attention in recent years and its afforestation area is constantly expanding. Due to the wide distribution of Larix principis-rupprechtii, the difference in ecological conditions in the horizontal and vertical directions of the natural distribution is very large. The ecological conditions of different locations in the distribution area have long been the direction of selection and accumulation of large-scale indefinable variation in the population. As a result,