一、选取砧木
砧木选取华北地区广为栽培的白榆，要求生长健壮，干形良好，三至六年生的大苗。在春季发芽前，按照要求高度约2至2.5m截去树头，横截面直径以2至5㎝为佳。
二、采接穗
jiesuidecaijihezhuzang：longzhuayujiesuiyou2zhong，dongsuihechunsui。zhei2zhongjiesuizaijiajiefanzhizhongdoushiyong。dongsuixujingguodiwenzhuzang；chunsuizekesuicaisuijie，danyaozhangwohaoshiji。
1、dongsuidecaijihezhuzangxuanyonglongzhuayudangniansheng、yabaoman、jiejianzhangdushizhong、chongfenmuzhihuadezhitiao，jianxiadejiesuikeyonggouzangfajinxingzhuzang。xuanzedishijiaogaochu，paishuilianghao，tuzhishusong，beiyangdedifang，washenhekuangelmzuoyoudezhuzanggou，goudezhangdukeshijiesuideshuliangerding。zaigoudipuhouyue20㎝deshisha，ranhouzaipushangyicengjiesui，yicengshisha，yicengjiesui。
2、春穗的采集和贮藏春穗是树液已开始流动，冬芽刚开始生长的时候，选用1—2年生枝条，抹去生长过大的叶，剪成10一15㎝长的接穗，捆扎成把，将基部浸人水中约1—3㎝，随接随取。
三、嫁接
1、jiajiexuanyongzhijiefa，zai5yuezhongxiaxun，shuyejikaishiliudong，lipideqingkuangxia，keyongpijiefahuochapijiefa，danyipijieweijia。jiesuidai2zhi3geya，zaijibuyonglidaoxuecheng2zhi2.5㎝zhangdepinghuaxiemian，zaiyonglidaojiangzhenmuqingqingpikai；qianrujiesui，xingchengcengduiqi，jiesuixiemiangaochuzhenmujiemian0.2㎝。ruoyongchapijiefa，jiesuixiabuxiemianyaoxuechengyimianwei2zhi2.5㎝dezhangxiemian，yimianwei0.5㎝zhangdeduanxiemian，ranhouyongdaotiaokaizhenmupiceng。guduigucharujiesui，yaoqiujiesuixiemianlubai0.2㎝，yiliyuchenghuo。jiehaohouyongsuliaomojiangjiekoujizhenmuhengjiemianbaoyanbaojin，ranhoutaoshangsuliaodai。genjuzhenmucuxi，meikeshukejie1zhi4gejiesui。
2、接后15天检查，成活者可将砧木萌芽全部抹去，不成活者抹去弱芽，保留三五个壮芽，待下次补接，成活苗一个月后解除包扎物，解除时一定选取阴天时或晴天的傍晚，否则易造成刚放出来的嫩芽不适应外面的干热气候而死亡。当接穗上的芽长至30㎝长后，就要开始有选择地绑支撑物，防止大风刮掉接穗。
四、管理
嫁接苗要加强肥水的供应，促使其早发芽，发壮芽，注意修剪，抹去砧木上发出的原白榆芽，调整树枝的伸展方向，使冠形端正，不出现偏头。
五、整形
longzhuayuyibandouyaoqiuzhenglichengsanzhuang。dingzhihougenjuzhitiaoshengzhangkuai、naixiujiandetedian，zhengxingxiuzhijinxingzaoxing。duizhujuxiao、kongjianshaodezhizhutongguobangzha，yiqiangcuruo，jiuzhengpianguan，shizhitiaojunyunxiachuishengzhang。dangchuizhijiejindimianshi，conglidimian30zhi50limichuzhouweijianqi，qiwaixingrutongyigelvseyuanzhuti，henyoutese
