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花的叶子发黄是怎么回事
更新时间: 2020-08-16 00:00:00  

1、旱黄:缺水的黄与水多的黄不同,缺水的黄为叶梢或边缘发枯,发干,老叶自下而上枯黄脱落,但新叶生长比较正常,注意浇水时浇足、浇透即可;

2、灼黄:强烈阳光直射到一些喜阴的花卉易引起花卉叶梢,叶缘发枯,叶片朝阳部分出现黄斑,移到阴处即可;

3、缺光黄:长时间置荫蔽环境,叶片得不到足够阳光,不能形成叶绿素,整株叶片变黄继而脱落,补充光照可避免此病;

4、肥黄:施肥过多或浓度过大引起的花卉发黄,一旦发现应立即停止施肥,严重的用大量清洗冲洗部分肥料;

5、缺肥黄:表现在嫩叶颜色变淡,呈黄或淡绿色,而老叶比较正常或逐渐由绿转黄,检查盆土如有干结现象应换土,平时薄肥勤施并适时浇一些矾水。

关键词: 叶子 发黄 怎么 回事

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