桂花有哪四怕？

植物图片 2019-09-04 09:13

香飘四溢的桂花

桂花有“四怕”：

一怕碱土。桂花性喜微酸性土，以pH值5. 5~6.5为宜。若栽植在碱性土壤上，可造成叶子枯黄，甚至全株死亡。

二怕浇水不透，即浇半截水。浇水不透则土壤表层潮湿，下半截干燥，根系得不到充分的水分，造成叶子发干变枯，甚至叶子脱落现象。

三怕积水。土中积水易造成烂根、落叶，时间一长，根系就会腐烂，造成植株死亡。雨季一定要注意排水。

四怕高温越冬。桂花比较耐寒，长江以南能露地越冬，华北一带室内越冬，室温以2~4℃为宜。如果室温过高，冬天或早春休眠芽萌发，空耗养分，植株会发育不良。另外，北方的早春干旱多风，盆栽桂花不宜出室过早，否则新枝会被强风吹伤；桂花还怕烟尘，不宜栽植在厂矿附近。

专题： 桂花
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