人工红松林杈干现象十分普遍，严重地影响到树木生长、材质与结实。通过调查研究与分析，认为杈干是在主梢生长点受害后，在同轮有两个相近或相等的枝条，且强于其余侧枝的情况下形成。这一发现为控制杈干的发生培育利用红松资源提供了依据。 Artificial Korean pine forest twigs dry phenomenon is very common, seriously affecting the growth of trees, materials and firm. Through investigation and analysis, it is believed that the stems are formed after the victim of the growth of the main shoots, with two similar or equal branches in the same round and stronger than the other branches. This finding provides the basis for controlling the occurrence of twigs and nurturing the use of Korean pine resources.