苏联林业科研单位研制的净种新工艺,使云杉和松树饱满种子纯度达到99%,落叶松达到90%。净种新工艺为苗圃薄膜下育苗新方法的提出带来可能性。这种方法不是在苗圃而是在种子工厂的自动线上“播种”。首先在一种长形纸片(纸片系特殊纸张切成,干燥状态相当结实,一旦潮湿几分钟即破坏)上薄薄涂一层由同种纸浆制成的特殊胶质,趁胶质未凝结按大约2—2.5厘米间距置种子于纸片上。覆在种子表层的胶质不影响空气水分 The Soviet Union forestry research institutes developed a net new technology to spruce and pine full seed purity of 99%, larch reached 90%. The net new technology for nursery film seedling raising a new method to bring the possibility. This method is “seeding” not automatically at nurseries but at seed plants. First in a long piece of paper (paper special paper cut into sections, the state is quite solid dry, damp for a few minutes once damaging) coated with a thin layer made of the same kind of pulp special gum, Set the seeds on the pieces of paper at about 2-2.5 cm intervals. The gum that covers the surface of the seeds does not affect air moisture