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云南松是我国西南地区最重要的用材树种之一。它适应性强,能耐干旱瘠薄,生长较快,用途广泛,分布辽阔,种源丰富,因此,大量用于荒山造林及森林更新。仅云南近年来每年营造的云南松林即达210—315万多亩,占造林面积的70％左右。近几年,平均每年生产种子45万多市斤尚不能满足造林和更新的需要。云南松遍及云南大部,以及四川、贵州、广西、西藏等省区与云南相邻的地域,其垂直分布的相对高差达2000多米。在差异
Pinus yunnanensis is one of the most important timber species in southwest China. It is adaptable, capable of drought infertility, rapid growth, wide range of uses, widely distributed, rich in provenances, therefore, extensive use for barren hills afforestation and forest renewal. Only in Yunnan in recent years each year to create Yunnan pine forest that is 210-315 million mu, accounting for about 70% of afforestation area. In recent years, the average annual production of more than 450,000 jin of seeds still can not meet the needs of afforestation and renewal. Yunnan pine covers most of Yunnan, and Sichuan, Guizhou, Guangxi, Tibet and other provinces and adjacent areas of Yunnan, the vertical distribution of the relative elevation of more than 2,000 meters. In difference