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近年来,一些教学和科研单位为在我国推广立地指数表做了大量工作。1979年末由林业部规划院和北京林学院负责,在福建省进行了杉木立地指数表的试编。在试编过程中,对如何理解和确定优势高、如何确定样地面积和抽取优势木的株数等问题,有不同见解,因此,有进一步探讨之必要。就其对优势高的定义和确定原则而言,国外有几种意见。Kramer(1959)列举了三种:(1)林分优势高为占有一定百分数的林木平均高;(2)以单位面积上一定数量的最粗或最高树木的平均高为优势高;(3)以最大的树高为优势高。也有人提出林分优势高为:
In recent years, some teaching and research institutes have done a great deal of work to promote the site index in our country. At the end of 1979, the Planning Department of the Ministry of Forestry and Beijing Forestry College were responsible for the trial preparation of the Cedar Site Index in Fujian Province. In the process of trial and editor, there are different opinions on how to understand and determine the advantages of high, how to determine the sample area and the number of the superior wood extraction, etc. Therefore, it is necessary to further explore. In terms of its definition and determination of superiority, there are several opinions abroad. Kramer (1959) lists three types: (1) high stands have high average percentage of forest trees; (2) high average number of top or highest trees per unit area is superior; (3) Take advantage of the largest tree height. Others have suggested that the advantage of stands is: