一、前言杉木是生长快、材质好、用途广的用材树种,人工营造面积大、分布广,尤其在我国木材供需矛盾突出,杉木价格高,因此乱砍滥伐,破坏森林资源的案件时有发生,司法部门在处理类似案件时,由于林地上仅存有被盗伐根,办案人员难以准确地估计立木材积,给林政资源和司法部门带来了极大的困难。同时,在森林资源清查固定样地复查时,如果发现样木 I. Introduction Cunninghamia lanceolata is a timber species with fast growth, good material and wide use. It has a large artificial area and a wide distribution. Especially in the case of prominent contradiction between supply and demand of timber in China and high price of Chinese fir, deforestation and destruction of forest resources have occurred When the judicial department handled similar cases, it was difficult for investigators to accurately estimate the stand volume because of the existence of only stolen roots in the forest land, which brought great difficulties to the forestry resources and the judiciary. At the same time, in the fixed forest resources inventory review, if you find kind wood