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地位质量是指林地的生产力.了解林木生长对环境条件的反应,在森林调查和营林工作中有着相当重要的意义.开始用土壤肥沃度作为评定地位质量的指标,但它不能完全反映林木生长与环境的关系,可能掩盖着相互依赖、相互影响的其它因子.因此,用乔木—下木—活地被物命名的林型来评定地位质量就有了一定的局限性.随后用木材产量多少评定地位质量.又受到密度的影响.即使立地条件相同,由于密度的不同,木材产量也有很大差异.经过多年实验分析证明,林分树高反映立地条件比较灵敏,与林分生产力有着紧密的联系,且树高测定比较容易,受密度的影响小于平均直径和蓄积量.因此,用既定年龄时的林分平均高确定的地位级作为
The quality of standing refers to the productivity of forestland. Understanding the response of forest growth to environmental conditions is of great importance in forest investigation and forest management .First, using soil fertility as an index to assess the quality of status, it can not fully reflect the growth of forest trees The relationship with the environment may mask other factors that are interdependent and interacting with each other.Therefore, the quality of the status quo is limited by the arbor-alder-woodland named forest type, and then how much wood output The quality of the status is assessed and affected by the density.While the site conditions are the same, the output of the wood varies greatly due to the different density.After years of experimental analysis, it is proved that the stands reflect the site conditions more sensitively, and the stand productivity is close , And the tree height is easier to measure and less affected by the density than the average diameter and stock volume.Therefore,