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汪清林业局为了解决春季造林劳力紧张问题,从1982年开始进行秋季更新造林试验,到1990年共完成更新造林面积2000余ha,经调查,当年成活率达到97.1%,三年保存率为93%,分别比国家规定提高了12.1个百分点和13个百分点。其主要技木措施有以下六项。1.全面调查没计,实行工程造林。在更新造林前,先对造林地的地势、土壤、植被、气候特点等进行全面调查,根据立地条件和造林树种的生物学特性,确定秋季更新
Wang Qing Forestry Bureau in order to solve the problem of tension in afforestation in spring, from 1982 onwards afforestation experiment, completed a total of 2000 acres of afforestation area by 1990, after investigation, the year survival rate of 97.1%, three-year preservation rate of 93% , Respectively, higher than the national regulations by 12.1 percentage points and 13 percentage points. The main technical measures include the following six items. 1. Comprehensive investigation did not count, the project afforestation. Before reforestation, a comprehensive survey of the topography, soil, vegetation and climate characteristics of the afforestation site shall be carried out. According to the site conditions and the biological characteristics of afforestation species, the autumn update