从森林分子理论观点来说,现在所有对异龄林调查方法不外有二种意见:把异龄林分划为不同大小的世代作为调查基本单位;或把异龄林看作一个整体来调查。由于用不同的办法来确定世代的大小,就导至了要采用不同方法来研究异龄林分,这不但给研究异龄林工作造成困难和推延了这一工作,而且不同方法所得的研究结果也无法进行对比。 From the standpoint of forest molecular theory, there are no more than two opinions on the survey methods of different age forests nowadays: dividing the different age forests into generations of different sizes as the basic unit of investigation; or as a whole, . Different approaches to determining the size of a generation led to different approaches to studying different-age stands, which not only made it difficult and time-consuming to study the work of different age forests, but also the results of different methods Can not be compared.