玉兰黄叶的原因和处理办法

植物图片 2021-02-25 17:23

玉兰黄叶可能有五种原因。如果是因为水分过多，则可以为它松土排水，或脱盆后剪掉腐烂的根系再换土重栽；如果是因为病虫害问题则要对症下药及时治疗；如果是因为自然老化，则不要担心，顺其自然即可；如果是因为土壤不适，则要更换成排水性好的微酸性质的沙土；如果是因为养分不足，则要及时追肥，适度增加肥量。

1.水分过多

原因：植物生长所需水分都是适量的，超过其所需范围，便会成为生长负担。如果给玉兰浇水太多，就会形成积水，造成根部腐烂，导致叶片较大面积泛黄。

措施：情况不严重的话，可以松松土，排出盆土内多余的水分，增加透气性。如果情况比较严重的话，需要把植株挖出来，把烂掉的根部剪除，并涂抹一些生长素和生根剂。之后换土重新栽种，促进它的根系重新生长出来。

2.病虫害问题

原因：玉兰会因为疥虫或者蚜虫的刺吸以及煤污病的发生，而出现叶片局部变黄的问题。

措施：需要查清病虫害源头，及时对症下药进行控制，叶子发黄现象就会得到缓解。

3.自然老化

原因：看到叶子发黄不要太慌张，有可能不是因为养护问题，而只是它新陈代谢的生长过程，是自然的老化变黄。

措施：这种情况的话不用担心，顺其自然，不定时为它修剪整理下枯黄掉落的叶片即可。

4.土壤不适

原因：玉兰对土壤的要求比较高。养护玉兰的土壤应是排水性能好的、微酸性质的沙土。如果是用的偏碱性的、板结的土壤，就会非常不利于它的生长，渐渐造成它的枝叶变黄。

措施：需要及时更换排水良好的微酸性质的沙土。要将植株挖出，剪掉可能腐烂的根系，对根部和新土消消毒，之后再重新栽种。

5.养分不足

原因：玉兰喜肥，它的生长需要通过施肥来提供足够的养分。如果施肥过少，植株生长就会营养不良，进而出现黄叶问题。

措施：需要及时追肥，不要一次施肥太多，适量即可，慢慢补充其所需养分。日常养护中，花期要施一些复合肥，花期后需施加一次氮肥。

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