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在上海地区栽植原产于酸性土壤上的园林花卉植物,经常会出现黄化现象。我们于1983～1986年以杜鹃黄化苗为实例,探讨产生黄化苗的原因和复绿措施,结果印证了前人已有的结论:黄化的原因主要在于介质中供铁能力不足,可诊断为缺铁性失绿症。对黄化苗施用复合液肥(本院自行研制的复合复绿剂),可以迅速有效地使植株复绿,并能正常生长和开花,主要原因在于复合液肥能使介质中有效铁数量增加,并能以有效铁状态稳定持久地存在于站养介质中。用黄砂与上海当地土壤以1:1的比例混合,结合使用复绿剂,可就地解决喜酸性花卉的生长介质,为减轻运输压力和节少生产成本提供了可行条件。
Planted in the Shanghai area native to acid soil in the garden flowers and plants, often appear yellow phenomenon. In 1983 ~ 1986, cucumber seedlings were taken as an example to explore the causes of yellowing seedlings and the measures of rejuvenation. The results confirm the previous conclusion that the main reason for yellowing is that the iron supply capacity in the medium is insufficient, Diagnosis of iron deficiency chlorosis. The application of compound fertilizer to yellowing seedlings (the complex compound greening agent developed by our hospital) can quickly and effectively rejuvenate plants, and can grow and bloom normally. The main reason is that compound liquid fertilizer can increase the available iron in medium Stable in the effective state of iron lasting presence in the plant medium. Using yellow sand mixed with Shanghai local soil in the ratio of 1: 1, combined with the complex green agent, the growth medium of acidic and acidic flowers can be solved in situ, which provides feasible conditions for reducing transportation pressure and reducing the production cost.