铁树不长新叶怎么办？铁树不长新叶的原因及解决方法

植物图片 2019-11-30 18:54

铁树也就是苏铁，是一种常见的观叶植物。在养殖铁树的时候，可能会出现长时间不长新叶子的情况，而铁树不长新叶怎么办呢?首先要找到原因，通常都是养护不当造成的，比如光照不足、通风不良等，只要适度的改善铁树的生长环境，很快就能够恢复生长萌发新叶的。

一、铁树不长新叶的原因及解决方法

1、光照不足

有些朋友会将铁树摆在室内养殖，起到装饰或者风水的作用。但室内的光照条件是满足不了铁树的生长需求的，所以会出现不长新叶的情况。

【解决方法】：在铁树被长期荫蔽之后，不能将其一下子移到强光直射的地方，先移到阳光散射充分的地方，然后再移到温和的阳光下补充光照，等到铁树适应后，一段时间后就能萌发新叶了。

2、通风不良

铁树在通风不良的情况下，也不容易长出新的叶子。通风不良会造成环境闷热，空气质量和湿度都非常的茶，非常的不利于植株的生长，造成不长叶。

【解决方法】：如果是室内养殖的话，一定要经常开窗通风，或者将铁树移到阳台等通风的地方养护，只要环境适合，自然会长出新的叶子。

3、土质不好

土壤是铁树生长的关键，如果土壤板结不排水不透气，则会造成根部呼吸困难，会严重影响生长。如果土壤肥力也不足的话，也就没有充分的养分去支撑它长出新的叶子。

【解决方法】：土壤板结就要适度的松土或者直接更换新土。如果土壤的肥力不足的话，就需要适度的施加肥料，肥料以氮肥为主，能够促进枝叶的生长。

4、根系腐烂

如果铁树的根系及其腐烂了，那植株就会停止生长，也就不会长出新的叶子了。造成根系腐烂的原因有很多，比如浇水过多造成盆土积水烂根，还有施肥过量造成植株烧根等。

【解决方法】：如果铁树的根系已经腐烂了，需要及时的将植株从盆土中取出，然后用消过毒的锋利小刀，将腐烂的部分切掉，并在伤口上涂上草木灰等消毒的物质，之后重新栽种即可。

二、养护铁树需注意的事项

1、适量浇水

知道了铁树不长新叶怎么办，还需要适度的养护。铁树生长是比较缓慢的，不喜欢太过湿润的环境。春秋冬三季在浇水的时候，都要遵循干透浇透的原则，通常是一周左右浇一次水。而夏天要多观察土壤的干湿情况，除了浇水之外，还可以往叶子上喷水保湿降温。

2、把控气温

铁树适合在20～30℃的气温下生长，耐高温也耐严寒，夏天气温过高可以适度的荫蔽通风，而冬天的时候可以耐零下10℃的低温，但最好移到室内过冬，更有助于植株的生长。

3、定期修剪

在铁树主干长到50厘米的时候，在春天需要将最底层的一圈老叶子全部割掉，之后每一年都割一圈。铁树的老叶观赏价值不高，这样会更有助于新叶的萌发。

4、换盆修根

给铁树换盆的频率可以不用太高，通常至少5年换一次。除了更换一个更大的花盆之外，还要换上新的土壤，在土壤中可以适度的掺入骨粉等磷肥，在换盆的时候，可以适度的将枯根烂根修剪掉，更有助于根系的生长。

看完上面的内容，相信大家应该知道铁树不长新叶的原因了，室内养殖的铁树是比较容易出现这种问题的，所以一定要注意养护。

专题： 铁树
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