樹木核心:皮層假說 描述樹木生長的假說,隨著年輕樹木的老化,年輕的樹會成為皮層,覆在老化核心上,隨著核心發展,氮基化合物會再轉移到年輕的皮層 Core: skin hypothesis an hypothesis describing the growth of trees postulating that the core of internal tissues is overlain by a skin of external tissues annually CORE-SKIN HYPOTHESIS As new young trees grow over older aging trees, the young living trees become a "skin" over the aging "core". As the central core develops, nitrogen-based compounds are