天气预报 > 其他 > 日香桂叶子发黄掉叶子怎么办
日香桂叶子发黄掉叶子怎么办
更新时间: 2020-07-01 00:00:00  

原因如下,可按照实际情况针对处理:

1、旱黄:缺水的黄与水多的黄不一样,缺水之黄为叶梢或边缘发枯、发干,老叶自下而上枯黄脱落。注意浇水时浇足、浇透即可;

2、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。如有干结现象应换土,平时薄肥勤施并适时浇一些矾水补铁;

3、缺光黄: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,应立即停止施肥,严重的用大量清洗冲

关键词: 叶子 发黄 怎么办

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