白榆适应性强,生长迅速,既可供荒山造林,又可做四旁绿化。但是,白榆初期枝梢生长旺盛,栽后2～3年常出现“头重脚轻”、“低头弯腰”等现象,影响树干的干形生长。我县一些农民在栽培白榆的实践中,采取修校整冠等方法,收到了良好的效果。1.去梢.白榆树苗生长很快,一般当年生苗平均高可达1米以上,但主干纤细、侧枝较少。为促进加粗生长和侧枝生长,栽植时要边栽边去 Elm adaptability, rapid growth, both afforestation for the afforestation, but also to do around the green. However, the early stage elm rose vigorous growth, 2 to 3 years after planting often appear “top-heavy”, “bow bent over” and other phenomena, affecting the trunk dry growth. Some farmers in our county in the cultivation of elm in the practice, to take the school crown and other methods, received good results. 1. Go shoots. Elm elm grow rapidly, the average annual height of up to 1 m above the seedlings, but the main slender, collateral less. In order to promote bold growth and collateral growth, planted side to planting edge