三角梅叶子发黄的原因及解决方法

植物图片 2019-08-29 10:09

造成三角梅叶子发黄的原因有很多种，如果光照过少最好保证每天有8～9个小时的光照时间，土壤不当则配制疏松肥沃的腐殖土壤，水分不当应保持不干不浇，浇则浇透的浇水原则，冬天保持盆土偏干即可。

1、光照过少

三角梅喜欢在阳光充分的环境中生长，如果光照过少会造成叶子的光合作用受阻，从而造成叶子发黄，最好在生长期间保持每天有8～9个小时的光照时间，如果摆在室内可采用人工补光处理就可以了。

2、土壤不当

三角梅的根部对土壤有很高的要求，如果土壤不当会造成根部腐烂出现叶黄的现象，那么三角梅叶子发黄的原因及解决方法是什么，首先将腐殖土，园土，沙土，粪土按照4:3:2:2的比例进行混合配制，然后在土质中加入适量的腐熟厩肥充分混合后重新上盆即可。

3、水分不当

三角梅在每个季节都有不同的浇水需求，如果水分过多或者过少都会造成植株出现叶黄的现象，在浇水过程中要保持不干不浇，浇则浇透的原则进行，而且秋冬天节要严格控制浇水，保持盆土偏干最好。

4、施肥不当

三角梅如果施肥不当也会造成叶黄干枯的现象，通常下盛夏高温季节或者严寒季节，要减少施肥，生长期间每隔10天左右施一次稀薄的粪水溶液，而且每次施肥要浇入适量的水分，及其松土处理就行了。

5、病虫危害

如果三角梅发生叶枯病，褐斑病，蚜虫等病虫危害，叶子上会出现斑点，且慢慢扩散造成发黄枯萎的现象，所以在平时养护中，要加强空气的流通，不定期的清理盆土上的杂质，发现病害要及时剪除要害部位，用对应的药液进行预防。

专题： 叶子发黄 三角梅
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