园林绿化中，我们常见到很多紫薇开不了“半年花”，很多只能开一次花，是什么原因缩短了紫薇的花期ni？bizhejingduonianguancha，zhaodaoleyuanyinsuozai，xianjiangqiyuanyinjiduicejieshaoruxia，gongduzhecankao。
紫薇花图片
xiujianbujishi zaigongzuozhongwomenchangjiandao，henduoziweizaikaiguodiyicihuahoujiujieguole，meiyouzaichoushenghuaxu。zheilimiandegenbenyuanyinshimeiyouduiziweijishijinxingxiujian，ziweidehuaxukaizaixinzhidingduan，guci，meicikaihuahoudouyaojishijianchuhuazhi，cufaxinzhiyiyanzhanghuaqi。
水肥不到位 紫薇的花期zhang，guduishuifeiyaoqiuyebijiaogao。youyugongzuoliangda，henduoyuanlingongrenzhishiyinianshiyongyiliangcifei，jiaoshuicishuzegengshao。chongzudeshuifeishizhiwukaihuadezhongyaobaozhang，choushengzhitiaohehuaxudoubixuyaoyouchongzudeyangfenheshuifenlaibaozheng。yinci，zaiziweidehuaqi，yaoyouchongzudeshuifeigongying，yibanlaishuo，kezaimeicihuahoushidangzhuishilinjiafei，jiaoshuizeyingyiturangshangqingweizhun，yibanxiaji15tianzhi20tianjiaoyicitoushuijike。
guangzhaobuzu yixieziweizhongzhiyudashupangbianhuojianzhuwubeiyinchu，suinengshengzhang，danzhangshimingxianjiaoruo，shutileiruo，zhitiaoxianxi，shutiyenengkaihua，danhuaxuduanxiao，huasedan，huaqiduan。ziweisuiranshaonaiyin，danzaiyangguangchongzuchushengzhanggengwangsheng，huaqigengzhang。guci，guangzhaobuzushiziweihuaqijiaoduandezhongyaoyuanyin。duiyuzheizhongqingkuang，yaojishijiangziweiyizaizhiguangzhaochongzuchu，shiqijiankangshengzhang，zheiyangcainengconggenbenshangjiejueqibunengchangfangbannianhuadewenti。
病虫害防治不当 紫薇病虫害较多，常见的病害有煤污病、白粉病；常见的害虫有介壳虫、蚜虫、大袋蛾、金龟子、绿盲蝽等。煤污病和白粉病对紫薇的影响都非常大，而且发病高峰期正值紫薇的花期，故此，要想使紫薇能常放半年花，首先要保证紫薇“身强体健”，除了加强水肥管理，使其得到充足的营养外，及时修剪，使植株保持通风透光也很重要，更关键的是要及时对病害进行防治，本着“治早，治了”的原则来防治。对于虫害，则应多措并举，多管齐下，将害虫杀灭于萌芽状态。
