一、引种目的和意义发展速生树种,对于川西高山林区培育后续森林资源,实现永续经营利用具有重要意义。宝兴、红旗、川西等地采用落叶松更新已取得显著成效。近几年来落叶松更新比重日趋加大。为了适应生产发展需要,丰富高山更新树种和增添盆地边缘山地杉木上限高海拔地段的造林树种,我 First, the introduction of the purpose and significance of the development of fast-growing tree species, for the western Sichuan forest cultivation of follow-up forest resources, to achieve sustainable management and utilization of great significance. Baoxing, Hongqi, western Sichuan and other places using larch renewal has achieved remarkable results. In recent years, the proportion of larch renewal is increasing. In order to adapt to the needs of production and development, enrich the species of alpine regeneration and increase afforestation tree species at high altitude in the mountainous upper limit of the mountainous area of ​​the basin, I