【摘要】 <正> 森林的生产力与林分的结构状况有很大的关系,在森林资源的调查中经常可以遇到,同样的立地条件、相同的林分年令,森林单位面积蓄积量常常会有很大的波动,从数十立方米的蓄积量到数百立方米不等。这种波动追根溯源,都与林木树种组成的变化、层次重叠的形式、林冠郁闭的程度、立木数量的多寡、径级的大小以及林下植被发育的疏密等密切相关。因此,研究天然森林生产力与林分结构的关系,分析影响森林产量的群落结构因素,找出高产林分结构,对于发展林业生产具有极其重要意义。更多还原

【Abstract】 The paper has discussed the forest structure of the most production used quantification theory Ⅰ,orthogonal design and method of variant analysis in spruce-fir-korean pine forest in the Chang Bai Mountains, and has valued the function of ecological factors in thc forming growing stock, at the same time the mathematical model about the relation of ecological factors with growing stock of stand is set up.The result as follows: the growing stock of forest is increased gradually with reduction of average growing space of stand, but within certain bounbs the growing stock is increased with the total average breast-high diameter, the total number of trunks of trees, layers structure, the total close degrees and so on. Pure forest of korean pine has most growing stock. The forest Structure of the most produc tion belo,ngs, to the stand that has total average breast-high diameter above 26.1cm, total number of trees over 901, total close degress over 76％,growing space of upper strata below 27m~2, multi-storied structure, and has dominance of korean pine in the forest component.更多还原