早已有人指出,林学中关于疏密度为1.0的现行标准并不十分明确。有时按立地条件以最大可能值来确定某一树种的标准断面积是基于所谓标准林分理论的,而标准林分是按某些现实林木在其一生中一次(或数次)所能达到的最大限度值为基础设想的。其实,林木在这种极端状态下难以生长,因而用之导出的标准断面积整体上是和林业实践相脱离的,是不现实的。 It has long been pointed out that the current standard about the density of 1.0 in forest science is not very clear. Occasionally, the maximum possible value of site-based criteria for determining the standard cross-sectional area of ​​a tree is based on the so-called standard stand theory, which can be achieved once or several times in a lifetime by some realistic tree species The maximum value is based on the idea. In fact, trees are hard to grow in this extreme state, so the standard cross-sectional area derived from them is totally unrealistic with the practice of forestry.