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立木材积表是森林经营和森林调查中不可缺少的常用数表之一。编制立木材积表,最好是利用皆伐标准地的伐倒木。但由于我省主伐林分很少,皆伐作业不多,历来编制立木材积表都是依靠调查中随机或机械抽取的一定数量的林木,伐倒测定其直径和计算材积所得。特别是自杆和华北落叶松集中分布的管涔林区,林相整齐,材质很好,林龄大多为中龄林。作业主要是间伐抚育。要想利用皆伐标准地,伐倒林木编制材积表,在过去是不可能的,今后也是不会很多的。1986年,我们结合经营采伐试验,在500亩小面积皆伐的林分中,利用伐倒木,
Standing timber inventory is one of the most frequently used tables in forest management and forest surveys. The establishment of timber volume table, it is best to use the standard clear cutting down trees. However, due to the fact that there are only a few main-cut forests in our province and few clear-cut operations, a certain amount of trees randomly or mechanically drawn from surveys have been relied on for the establishment of timber volume tables. Especially from the pole and Larix principis-rupprechtii concentrated Guan Lin forest area, neat forest, material is very good, mostly aged middle-aged forest. Homework is mainly tending. In order to utilize the standard of clear cutting, it is not possible in the past to cut down the volumetric tables of forest construction and there will not be much in the future. In 1986, we combined with the operation of logging experiments, in 500 acres of small clear-cut stands, the use of cut down wood,