帽儿山复层异龄天然林的林龄结构

Age Structure of Compound Storied Uneven-aged Natural Forests in Maoershan of Shangzhi City,Heilongjiang Province

应用地统计理论和数学模拟分析方法,对经过人工抚育和未经过人工抚育的复层异龄天然林林龄结构及树木胸径与林龄的关系、林木总的林分分布类型与种群林龄分布进行了分析探讨。结果表明:经过人工抚育的天然林在林龄结构上更具有优越性。而林木数量、林分密度上均要低于未经过人工抚育的天然林,并且在幼苗数量上明显高过未经抚育的天然林。

An experiment was conducted to study the age structure, relationship between diameter at breast height of trees and age structure, tree species composition, and distribution of population age for the compound storied uneven-aged forests before and after artificial tending in Maoershan Experimental Forest Farm of Shanzhi County, Heilongjiang Province by the theory of geostatistics and the method of mathematical simulation. Result shows that the age-structure of the natural forests after artificial tending is more reasonable than that of the forests before artificial tending. The number of trees and the stand density of the natural forests after artificial tending are lower that those of the natural forests before artificial tending, while the number of the young seedlings in the former is higher than that in the latter.