红豆杉叶子发黄的原因及解决方法

植物图片 2021-05-30 13:11

如因环境改变导致，应让其缓慢适应，不可突然改变。如浇水过多导致，翻土透气或换盆；缺水则需要及时补水。如因暴晒或空气干燥导致，应及时遮阴并向周边喷水，增湿降温。如缺肥导致，应及时补充稀释肥水；施肥过多则需要更换盆土。

环境突变

生长环境的突然变化，会导致红豆杉不能一下子适应，导致植物的生长状态不良，出现叶子发黄的现象。

解决方法

在移植红豆杉的过程中，要制造一个与原环境相似的环境，然后慢慢调节。在生长环境突然发生变化的时候，也一样，慢慢进行调整。

浇水过多过少

在养殖的过程中，浇水过多会导致红豆杉的嫩叶黯淡无光，新梢的顶心萎蔫。长时间的缺水会导致叶面边干，缺少水分，出现发黄现象。

解决方法

情况不是很严重的时候，要控制浇水的量，用铲子轻轻挑松盆土表面的土壤，让土壤透气，每晚搬到有露水的地方。情况严重的时候，直接更换土壤。在浇水的过程中，要以不干不浇，浇则浇透为原则。要注意盆土表面干燥但中间土壤不一定缺水，浇水的时候可以用一些防烂根的药剂。

暴晒

夏季高温天气下，将红豆杉暴露在阳光下直射，会导致植物蒸腾作用过强，根系补水的速度跟不上，导致植物叶面缺水从而萎蔫发黄。

解决方法

将红豆杉放到室内，向叶面喷水，等过一段时间就会恢复。

空气干燥

红豆杉是不适合放在空调的出风口处的，这会导致红豆杉叶面的水分蒸发量加大，造成红豆杉的枝叶快速的脱水，叶面卷曲干枯，出现萎蔫、下垂的现象。

解决方法

如果室内开空调，要对红豆杉的叶面喷水，保持叶面的湿度，并在室内放一盆水。

阳光不足

光照不足。光合作用弱，光合产物不能循回供应根系，是根系缺营养物质导致叶面发黄、掉叶。

解决方法

早晚放到阳台或者室外，每隔几天进行一次即可。

温度过高过低

红豆杉所处的环境温度过高会导致叶面缺水，出现焦黄现象。温度过低会影响植物内部的营养运输导致营养不足，使叶面发黄。

解决方法

在温度过高的时候，想红豆杉的叶面喷洒水雾，使其保持湿润。当室外天气变化大的时候，要注意红豆杉的防寒保暖。

施肥过多过少

新买的红豆杉不能在新芽叶面喷洒肥液，会导致红豆杉的嫩叶或嫩芽萎缩卷曲。长期缺肥，会导致红豆杉叶面发黄，生长缓慢。

解决方法

当施肥的过多的时候，要适当稀释肥水，或者更换盆土。当长期缺肥的时候，要进行施氮、磷、钾。

病虫害

病虫害会导致苗木下部针叶和小枝上出现褐色的小斑点，渐扩大成深褐色，最后导致叶片枯死。

解决方法

在出现叶枯病和赤枯病的时候，要进行治疗，用波尔多液防治或退菌特防治。

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