一、前言云南松(Pinus yunnanensis Franch)云南省主要用材和造林的针叶树种。分布于北纬23°—29°,东经98°—106°30′,垂直分布于海拔800——3200m,其区域内地貌类型复杂,地区间气候变化极大。土壤有森林红壤、褐红壤红棕色森林土、黄红壤等多种类型。同一树种长期在气候、土壤条件不同的地区生长和发育,其形态、生长、生理、抗性以及适应性等方面,会产生各种变 I. INTRODUCTION Pinus yunnanensis Franch The main timber and afforestation conifer species in Yunnan Province. Located at latitude 23 ° -29 ° north, longitude 98 ° -106 ° 30 ’, and vertically distributed at an elevation of 800 - 3200 m, the types of landforms in the area are complex and the climate change between regions is extremely large. The soil has red soil, brown red soil red brown forest soil, yellow red soil and many other types. The same species grows and develops permanently in different climatic and soil conditions in the long term, with various morphologies, growth, physiology, resistance and adaptability