一、前言林下红松(Pinus koraiensis)幼树的更新数量和生长速度与红松林的稳定发展休戚相关,并决定着它的演替方向和进程。在小兴安岭广大的天然林区,原始林下红松幼树生长缓慢,死亡率高,亟待解决。以往的研究多集中于光照和气候条件等环境因子的影响,对于大面积原始林区幼树矿质营养代谢规律的研究很少。植物的营养元素贮藏与分配对于生长有密切的关系,各种环境因子都直接或间接地影响到植物的矿质吸收和利用,进而影响各种 I. INTRODUCTION The regeneration quantity and growth rate of Pinus koraiensis young saplings are closely related to the stable development of Pinus koraiensis and determine its succession direction and process. In the vast natural forest area of ​​Xiaoxing’anling, young Korean pine trees grow slowly and have a high mortality rate under the primitive forests, which is in urgent need of solution. Previous studies mostly focused on the influence of environmental factors such as light and climatic conditions, and few studies have been conducted on the mineral nutrition and metabolism of young saplings in large-area pristine forests. Plant nutrient storage and distribution are closely related to the growth of a variety of environmental factors are directly or indirectly affect the plant’s mineral absorption and utilization, thereby affecting a variety of