白榆的育苗和造林大多采用播种方法,近年来,我圃采取扦插方法育苗、造林,成活率可达80—90％,且苗木生长较快。据1980年11月对当年生扦插苗和播种苗的生长调查,扦插苗平均高1.05米,平均地径0.85厘米;播种苗平均高0.87米,平均地径0.64厘米。扦插后能保持河南自榆(母树)干形直、抗性强等优良性状。一、种条的选择、采集和处理 Elm seedling and afforestation are mostly used sowing methods, in recent years, I nursery cuttings taken nursery, afforestation, survival rate of up to 80-90%, and rapid growth of seedlings. According to the growth survey of cuttings and sowing seedlings of the current year in November 1980, cuttings averaged 1.05 meters and an average diameter of 0.85 centimeters. On average, sowing seedlings were 0.87 meters high with an average diameter of 0.64 centimeters. After cutting can keep Henan since Yu (mother tree) stem straight, strong resistance and other fine traits. First, the choice of species, collection and processing