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植物的生长发育过程中，当缺少某种元素时，在植株形态上呈现一定的病状。观测植物缺素症状进行营养诊断并指导施肥，这在农作物和园艺作物上已有不少报道。对节白蜡（Fraxinushupehensis）是中国特有种和国家珍稀濒危植物，为优良的盆景和园林绿化植物，有关其缺素症状和营养
Plant growth and development process, when the lack of a certain element, the plant morphology showed certain symptoms. Observing plant deficiency symptoms for nutrition diagnosis and guidance on fertilization has been reported on crop and horticultural crops. Fraxinushupehensis is endemic and endemic to China. It is an excellent bonsai and landscaping plant, and its deficiency and symptoms