分布在我省滇西北高山针叶林区中的松科植物大果红杉(Larix potaninii Batal.vat.macrocarpa Law.),虽然面积不大,但它分布的范围较广,分散镶嵌在寒温性针叶林中。从它的更新情况来看,大果红杉是高山暗针叶林区很有发展前途的更新树种之一。我们一九七八年初在完成三坝林业局总体设计任务的同时,曾对中旬的三坝、安南、吉丁坝、 Larix potaninii Batal.vat.macrocarpa Law, distributed in the coniferous forest region of northwestern Yunnan Province, although its area is not large, it distributes in a wide range and disperses in cold temperature Coniferous forest. From its update situation, the large Sequoia is one of the more promising species of regeneration in the mountain dark coniferous forest. At the same time that we completed the overall design task of the Sanba Forestry Bureau in early 1978, we conducted a series of surveys on the three dams, Annan, Jiadingba,