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玫瑰 > 正文

为什么玫瑰叶子大片发黄,强光晒伤或浇水不当

  • 编辑:植物之家木槿
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  • 最后更新:2019年02月01日
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玫瑰的叶子出现大片发黄,可能是因为强光晒伤,需要摆放阴凉处遮荫养护;如果是浇水不当,对于积水要排出,少水则要补水,2~3天浇水一次;肥料过浓要清水浇灌进行稀释,平常半月薄肥勤施一次;低温冻害要控温在20~30℃左右;病虫害影响则要剪除病叶,之后喷药进行防治。

玫瑰的叶子大片发黄的原因

1、强光晒伤

玫瑰在养护的时候,虽然其喜光,但是将其摆放在强光暴晒处,就很容易导致其叶子出现晒伤,进而大片发黄。此时需要将玫瑰摆放在阴凉的位置养护,并为其洒水在叶子上,让其尽快恢复,平常保持8小时以上散光即可。

2、浇水不当

其实浇水不当也会导致玫瑰叶子大片发黄,如果是因为浇水过多出现积水叶子发黄,则要将玫瑰盆土中多余水分进行排出,之后控水养护;如果是少水使其干旱发黄,则要及时补水,保持2~3天一次的浇水频率。

3、施肥过量

玫瑰的叶子大片发黄还可能是施肥过量,导致的它根部出现烧伤现象,需要用清水冲灌积肥,让玫瑰可正常吸收养分生长。平常养护时要注意薄肥勤施,半月左右施加一次稀薄的氮磷钾肥,以免其再因少肥而叶黄。

4、低温冻伤

一般在养护时需要将玫瑰的生长温度控制在20~30℃左右,因为在遭受低温冻害以后,玫瑰的叶子也会出现大片发黄的情况。因此在冬季要将温度控制在10℃以上,夏季也要做好降温处理,避免高温水分蒸发多叶子发黄。

5、病虫害威胁

玫瑰在遭受病虫害的影响以后,也会导致其叶子出现大片发黄的情况,尤其是叶斑病等病害,会让它生长不良。此时要将受损的病叶进行剪除,然后对玫瑰喷洒杀菌除虫的药液,摆放通风位置,让它健康生长。

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