一、前言偃松(Pinus Pumila (Pall.)Regel),又名矮松或爬松,是一种伏卧状或丛生状灌木,高3—6米,分布于我国东北大兴安岭、小兴安岭;吉林老爷岭和长白山。在土层浅薄、气候寒冷的高山地带与西伯利亚刺柏混生,或在落叶松林下形成茂密的矮林。据黑龙江省第二森林调查大队初步调查,在大兴安岭林区,落叶松-偃松林与偃松 I. Introduction Pinus Pumila (Pall.) Regel, also known as dwarf pine or climbing pine, is a lying or clustered shrub, 3-6 meters high, distributed in the Daxinganling Mountains in Northeast China, Xiaoxing’anling; Jilin master Ridge and Changbai Mountain. Mixed with Siberian juniper in the shallow, cold climate of the alpine region, or the formation of dense lush forests under the larch forest. According to the preliminary investigation of the Second Forest Investigation Team in Heilongjiang Province, in the Greater Xing’an Mountains, larch - Yan Songlin and Yan Song