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造林成活率的高低,涉及到苗木质量、栽植技术、立地条件等多方面的问题,而确保栽植前的苗木质量,则是提高造林成活率的关键。为了保持苗木活力,不使苗木质量大幅度降低,必须重视起苗后到栽植前的苗木管理。一、苗木的生命力与含水量苗木的含水量一般为苗木全重的89—90％。起苗以后,由于根系暴露在大气中,风吹日晒,水分会逐渐减少,并且初期最为显著。国外有人对杉木苗进行试验证明:苗木起出后放置5小时其含水量
Afforestation survival rate, relates to the seedling quality, planting techniques, site conditions and many other issues, and to ensure the quality of seedlings before planting, is to improve the survival rate of afforestation key. In order to maintain the vitality of nursery stock, not to significantly reduce the quality of nursery stock, we must pay attention to seedlings from the seedling to planting before the management. First, the vitality of seedlings and water content The seedling water content is generally 89-90% of seedlings weight. After the seedling, due to exposure to the roots of the atmosphere, the wind and the sun, the water will gradually reduce, and the initial significant the most significant. Some foreign experiments on fir seedlings proved: seedlings placed 5 hours after the release of its water content