油松(Pinus tabulaeformis Carr.)在华北分布广泛,解放后又营建了大面积人工林。研究油松生态系统的组成、结构和生产力,在林业理论和生产实践上都有重要意义。 绿色植物固定光能还原CO_2的过程是一切生态系统初级生产的基本过程。因此,群体光合速率问题必然成为研究森林生产力的基础。油松人工林群体光合速率的研究是北京林学院 Pinus tabulaeformis Carr. Is widely distributed in North China. After the liberation, a large-scale plantation was built. Studying the composition, structure and productivity of Pinus tabulaeformis ecosystems is of great importance both in forestry theory and production practice. The process by which green plants fix the light energy to reduce CO2 is the basic process of primary production of all ecosystems. Therefore, the problem of population photosynthetic rate will inevitably become the basis for the study of forest productivity. The study on photosynthetic rate of Pinus tabulaeformis plantation is from Beijing Forestry College