所谓低位多干,就是一头多干,包括双干、三干及林型,但不包括拼林(因为不是一个树头长出的)。众所周知,山松是靠实生苗(种子)繁殖,其他方法尚未成功。这就决定了它一子一苗,一头一干的特性。它的多干是怎样形成的呢?笔者认为:1、多粒种子共生在一起,久而久之,便融合连体。2、一头一干,在树干尚保留针叶时,自幼截干,由自然环境所致,如风、雨、雷电或因动物损伤、山体崩塌等原 The so-called low post and more, that is more than one dry, including double-dry, dry and forest-type, but not including the fight (because it is not a tree grows). As we all know, pine is relying on seedlings (seeds) breeding, other methods have not been successful. This determines its sub-seedlings, one by one feature. How is it formed? I think: 1, multiple seeds symbiotic together, over time, they will be integrated Siamese. 2, one at a time, keep the needle in the trunk, stem from childhood, caused by the natural environment, such as wind, rain, thunder and lightning or animal damage, the original collapse of the mountain