地位指数是评价立地质量的一种重要手段。地位指数曲线的形状随着树种不同和立地质量的不同而变化。因此,树高生长在不同的生长发育阶段呈现出不同的形状。客观上树木的高生长从幼苗到成材,生长速度总是遵循着由慢—快—慢这样一个演变过程。只是不同的 The status index is an important means of evaluating the quality of site. The shape of the status index curve varies with different tree species and site quality. Therefore, tree height growth presents different shapes at different stages of growth and development. Objectively, the high growth of trees from seedlings to timber, the growth rate is always followed by a slow - fast - slow such an evolutionary process. Just different