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根据造林单位反映:三年生红皮云杉苗,由于根系生长的两对侧根呈八字形展开,而且很硬,植苗比较困难。附合造林标准的二年生苗,根系比较柔软,侧根角度小栽植方便,我圃从1982年开始搞二年培育成苗的生产技术攻关。通过几年的实践,取得良好的效果。1985年培育的二年生红皮云杉苗木,亩产达到15.6万株,超过规定产苗量的20％,其中地径达到0.35cm以上、苗高达15cm以上的苗木占85％。地径达0.55cm、苗高30cm
According to the afforestation unit: Three-year-old red spruce seedlings, because the root growth of two pairs of lateral roots are eight-shaped start, and very hard, planting more difficult. Attached to the standard two-year-old plantation afforestation, the root is relatively soft, small lateral angle of planting easy, I nursery from 1982 to engage in two years to cultivate seedling production technology research. Through several years of practice, achieved good results. The perennial spruce seedlings nurtured in 1985 had a yield of 156,000 mu, more than 20% of the specified seedling yield, of which the diameter reached 0.35cm and the nursery stock of up to 15cm in height accounted for 85%. The diameter of 0.55cm, height 30cm