铁树根茎腐烂如何救治?
铁树在莳养过程中,常由于某机械性创伤及浇水过大,盆土黏重、施肥不当等因素的影响,造成创面呈溃疡性发展,茎干不同程度地腐烂。
通常处理茎干腐烂的办法,是用杀菌剂对溃疡进行消毒后,栽入素土中,以待重新发根,恢复生机,使溃疡面愈合,但效果往往不理想,有时会继续腐烂或生根花叶缓慢。通过试验发现用烈焰对茎干溃疡进行快烧收到了良好的效果,具体操作方法如下:
剪去铁树干上所有的叶片,并用利刀仔细刮除其中的溃疡部腐烂组织,直达新鲜组织。手持铁树,将溃疡部对准煤气灶的烈焰,迅速炙烧几秒,反复几次,待炙烧创伤面冷却后,用蜡封闭创伤面,利于伤IZl愈合。将整株铁树放入微红的高锰酸钾溶液中,消毒10分,然后将铁树插消毒后的素沙中。黑色的环境更有利于铁树伤口的愈合,因此,需用一只盆反扣在插铁树的盆上,将盆抬到温度在28℃的环境里养护。
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