pianguanshiyouyushumuzhangqizaoshouwailiyingxiang，shuguanbunengziranchengxingerchuxiandejixingxianxiang。shumupianguanbujinyingxiangqizhengchangshengzhang，erqieyingxiangyuanlinjingguandeguanshangxiaoguo。xiamianweinijiangjieyuanlinlvhuamiaomufashengpianguandejutiyuanyin。
1、dafengchuixirongyilvhuamiaomufashengpianguan。biruyixieshumuzaizhiyufengkou，shuzhongbenshenkangfengnengliyoubuqiang，jiashangzaizhimidujiaoxiao，zaizhangqizaoshoudafengchuixideqingkuangxia，jiyichuxianpianguanxianxiang。suoyishuozaifengkouzhongzhishumu，yidingyaoxuanzekangfengnengliqiangdeshumu，rumaobaiyang、liushu、bailadeng，qiezaizhimiduyaojiada，zheiyangkeyiyouxiaojianshaodafengduishuguandechuixi，congerfangzhipianguanxianxiangfasheng。
2、与建筑物距离过小会导致绿化苗木偏冠。如果将树木贴近建筑物栽植，靠外的部分树冠能正常生长，而靠近建筑物的半个树冠则没有生长空间，无法正常生长，久而久之树冠长成了半圆球形，形成了偏冠。所以在建筑物旁种植树木，一定要给树木留有充足的生长空间，一般来说，像白蜡、国槐等与建筑物的距离不应低于5米。
3、lvhuamiaomuzaizhiguomiyehuidaozhipianguan。ruguowomenjiangshuguanweiziranyuanqiuxingdeliangkeshulinjinzhongzhi，ruozhongzhijianjuguoxiao，liangkeshuxianglinbufendeshuguandoubuhuizhanghao，zuizhongxingchengpianguan。zaizaizhishumushi，tebieshizaizhixingdaoshudeshihou，yidingyaoanxiangguanbiaozhunguidingdejulizaizhi，jishishicongzhi，yebukexianglinguojin，yingjishumuliuzushengzhangkongjian。
4、renweidexiujianbudangzaochenglvhuamiaomupianguan。yixieduozhuganxingshumu，zaixiujianshiruobuzhuyijibuzhuzhidexuanze，huojiankouyaliudefangxiangbudui，junkezaochengshumupianguan。duiyuzheizhongpianguan，keyonglazhi、chengzhihuochenglajiehedengfangfazhuniandiaozheng。
5、基部主枝受机械损伤也会导致绿化苗木偏冠。对于多干形树木，在日常养护中，会因基部主枝受到机械性伤害而出现偏冠现象。对于这种偏冠的树木，可另选新枝加速培养新主枝，或用邻近大枝拉枝补空解决。若以上两种方法都没有条件，可用腹接的方法在适当位置另嫁接新枝。
