倒插钻天柳育苗好于长友，麻昌军（白河林业局）钻天柳，东北地区一个优良的乡土树种。它抗寒，耐湿，生长快，树干通直，树型美观，高可达二三十米。它既能固堤护坡、防风保土，又可美化城乡、保护环境，各地都在培育推广。然而，钻天柳育苗一直沿用传统的正插方式。我们... Inverted drill Tianliu nursery better than Changyou, Ma Changjun (Shirakawa Bureau of Forestry) drilling days Liu, an excellent native tree species in the northeast. It is cold, humidity, fast growth, trunk straight, beautiful tree, up to twenty or thirty meters high. It not only solid embankment slope protection, wind and soil, but also landscaping, urban and rural areas, environmental protection, all over the nurturing and promotion. However, drilling Tianliu seedlings have been used in the traditional way is inserted. we...