结合我国南方14省(区)杉木立地类型调查,在好、中、差不同立地条件的林分中,伐取平均优势木进行树干解析1077株.选用lgH=a+b(1/A)公式,分别各省(区)、产区求算出18条导向由线.采用b值标准差,将全国杉木划分三个生长类型,每个类型分别求算导向曲线经验式,并按树高相对值法,分别编制成地位指数表,同时确定了使用范围。 Based on the survey of the site types of Chinese fir (F) in 14 provinces (autonomous regions) of southern China, 1077 plants were harvested from the average dominant tree in good, middle and poor stand conditions, and the lgH = a + b (1 / A) , Respectively, the provinces (districts), producing areas calculated by the guide line 18. Using b value standard deviation, the national fir divided into three growth types, each type were calculated guide curve empirical formula, and according to the tree height relative value method , Respectively, into a status index table, while determining the scope of use.