养花技巧：6种花卉黄叶防治技巧

植物图片 2019-06-21 11:20

家养植物叶子发黄是最最最常见的毛病，但总无法根治。究其原因是没有找到造成花卉黄叶的“元凶”，下面小编教大家几种通用的黄叶防治技巧。

花卉黄叶防治技巧

一、水黄

水黄分两种情况：缺水（旱黄）和多水（水涝）。1、干旱：即盆栽脱水造成叶子发黄。养花遗忘浇水或临时浇半腰水(即上湿下干)，也简单惹起叶子发黄，叶子萎蔫下垂。先是下部老叶黄化，并逐步由下向上枯黄零落。这类状况需大批浇水并喷水，使其规复后再转入通常浇水， 　　2、水涝：浇水过量，盆土临时过湿，形成土中缺氧，使局部须根腐朽，使花草不克不及通常吸取水肥，以致花草叶子发黄零落。应立即掌握浇水，停息施肥，把它摆在通风枯燥处，并常常松土，使泥土通气优良。 　　

二、肥黄

肥黄也分两种情况：缺肥（营养不良）和多肥（营养过剩）1、缺肥：花草缺肥就显得粗大衰弱。叶子发黄，看上去一点活力没有。应立即施肥，几天便可奏效。 　　2、肥多：施浓肥过量或靠根部太近，花吸取不了把根烧伤，以致掉叶、黄叶。施肥切勿运用没经腐熟的肥料，也不要施肥过量，要薄肥勤施。假如肥施太多，可多浇水把肥扫除。也可从头换土。 　　三、盆土不适叶黄由于盆花临时浇用自来水，盆土内积聚咸碱。严峻时盆土上面发白，使花叶发黄零落。特别是南方水土含碱量都较高。可把苹果皮浸泡之水用来浇花，或许用磷酸二氢钾兑水浇花。移栽时最好采用酸性泥土。 　　四、花盆过小招致的叶黄由于长时间没换盆，花大根系多，需求水肥多，小盆满意不了花的发展需求。根系舒展不开，呼吸艰难，老叶干黄无光泽，嫩叶发黄肥大。此时要换恰当的花盆，土质采用有腐殖的疏松土。五、缺铁元素叶黄花草缺铁会使叶子发黄，可用铁锈水浇花，结果很好。也可在花盆内埋入生锈的铁钉。 　　六、病虫害形成的叶黄花在发展过程当中不免会发作病虫害，一旦发作病虫害，叶子就会发黄零落以至灭亡。每个月可用多菌灵喷施或灌溉，以防病害发作，留意通风优良。
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