一、水黄。盆土浇水过多,造成积水,盆土缺氧,使部分须根窒息而腐烂,失去吸收水份与营养的能力,从而引起花卉新梢顶心萎缩,嫩叶淡黄,老叶也逐渐暗黄。二、旱黄。花卉由于长期缺水或浇水不透而引起的黄叶,其特点是,下部叶片逐渐向上变黄,脱落或枯焦。要及时浇水,做到不干不浇,浇则浇透。 First, water yellow. Pond soil watering too much, resulting in stagnant water, basin soil anoxia, part of the fibrous roots decay and rot, lose the ability to absorb water and nutrition, causing the top of the flower tip atrophy, young leaves yellow, old leaves gradually Dark yellow. Second, dry yellow. The yellow leaves caused by long-term water shortage or watering, which is characterized by yellowing of the lower leaves gradually, falling off or burning off. To timely watering, so do not pour, pouring is drenched.