Most gaps formed in 2 or 3 gap focus formation periods except a few small gaps which formed i.
红松林相邻林木间的理论树冠重叠率与年轮径向生长呈显著负相关,不同树种间存在不同的竞争和协同关系;红松林中除个别小空隙是经过一个集中形成期形成外,大部分空隙是经过2~3个集中形成期形成的,1900~1920和1910~1930是大部分空隙的集中形成期。
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