白桦为桦木科桦木属的落叶乔木,为我国东北林区的主要阔叶树种。主要分布于东北、华北地区,近年来园林绿化栽植较多。强阳性树种,耐寒性强,喜空气湿润及酸性土壤,耐瘠薄。适应性虽强但在平原地区常生长不良。一、育苗技术1.育苗地的选择。白桦育苗地应选择地势较平坦,排水良好,灌溉方便,土质疏松、肥沃的沙壤土为宜。苗圃新播种地应进行土壤改良,土壤改良结合土壤翻耕进行。翻耕分秋耕和春 Birch is a birch deciduous tree of Betulaceae, which is the major broad-leaved tree species in the northeastern China. Mainly distributed in the northeast and north China, in recent years, more landscaping. Strong positive species, cold resistance, hi air humid and acidic soil, resistant barren. Although adaptable but often poor growth in the plains. First, nursery technology 1. The choice of nursery. Birch breeding site should choose a more flat terrain, good drainage, easy irrigation, loose soil, sandy loam is appropriate. The newly planted nursery should be soil improvement, soil improvement combined with soil tilling. Tillage points autumn and spring