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苗木是造林的物质基础,而苗木栽植前的体内含水量大小又是造林成败的关键。一般说来,一株苗木从圃地到栽植地,要经过出土、包装、运输、假植等工序。根据现行条件,苗木出圃后不可避免地要出现裸根过程,甚至完全暴露在日光下。苗根裸露时间的长短对造林成活率的影响,这一问题虽然已被人们所公认,但是从时间角度看,究竟产生多大影响,目前尚没有准确的数据。为了探讨这一问题,我们于1984年开展了这项试验,现将试验结果报告如下。
Seedlings are the material basis for afforestation, while the amount of water in the seedlings before planting is the key to afforestation success or failure. In general, a nursery stock from the nursery to planting, go through the unearthed, packaging, transportation, fake plants and other processes. According to current conditions, nursery stock will inevitably emerge nude root process, or even completely exposed to sunlight. Although the issue of seedling root length exposed on the survival rate of afforestation, although this issue has been recognized, but from the time point of view, how much impact, there is no accurate data. In order to explore this issue, we conducted the test in 1984, the test results are reported below.