论文部分内容阅读
红松(Pinus koraiensis),为常绿大乔木,树干通直圆满,节疤少,是我国珍贵的经济用材树种,副产品松籽又是上等的营养补品。在我国东北地区原始红松林内,树高
Pinus koraiensis is an evergreen arbor with straight trunks and few knots. It is a precious tree species for economic use in our country. Pine nut, a byproduct, is also a top nutritional supplement. In the primitive Korean pine forest in Northeast China, tree height