仙人掌变黄的原因是什么

植物图片 2021-06-10 15:16

仙人掌变黄的原因有很多，若因浇水过多，要停止浇水一段时间，待土壤干燥后再浇水养护；若因干旱脱水，要在盆土部分浇水；若因施肥不当，要保证薄肥勤施，过肥时要及时倒盆冲洗；若因光照不良，要散光照射；若因病虫，要及时喷药。

原因

浇水过多

盆土长期处于一个过湿状态，其中极度缺氧，仙人掌逐渐腐烂，阻碍了养分及水分的正常吸收，于是叶片变黄脱落，此时应当停止进行浇水，并暂停施加肥料，保持土壤通气。

干旱脱水

与上面刚好相反，这是由于养花浇水上湿下干，影响了仙人掌水分的吸收，导致叶色暗黄没有光泽，由下往上逐渐枯黄脱落。这时要停止浇水或者喷水，保持适宜使其逐渐复原。

长久脱肥

长期没有换土，此时应及时倒盆，逐渐增加复合花肥。

施肥过量

由于施肥过多，导致老叶逐渐脱落，此时便要停止施肥，并适量的增加水分，立即进行倒盆，用水对土坨进行冲洗。

高温炎热

需要将仙人掌及时往阴凉通风的地方转移。

庇荫过度

由于长期放置于阴凉处导致阳光吸收不充足，需要及时往通风的向阳处转移。

水土偏碱

在水土偏碱的北方地区，图中缺乏可溶性的铁元素，所以针叶便会逐渐枯黄。要及时浇矾肥水。

密不透风

合理施加修剪，使之透光，由于枝叶繁茂，容易导致叶片脱落，注意通风透光。

空气干燥

空气过于干燥便要注意喷水，适当增加空气湿度。

温度不当

由于四季变化，所以室温也会随之变的不同，注意及时调整适宜的室温。

土壤偏酸

土壤中化学元素的流失导致土壤变酸，需要施加钙镁磷等碱性溶液。

病虫害

由于病菌导致容易引发叶斑病，致使枝叶枯黄，及时喷药防治。

强性刺激

农药喷洒的浓度过大，导致有毒气体产生污染，导致整体枯死，应合理使用农药，防止空气污染，正确做出判断，对症下药。

好了，在小编的努力下本篇文章终于完结了，不知花友们心中可有深入的了解，让我们一起来栽培仙人掌试试吧！

专题： 仙人掌
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