柑桔树在生长发育过程中,要从土壤中吸收大量营养元素氮、磷、钾、钙、镁、硫;也要吸收微量营养元素硼、锌、铁、铜、铝等。以上两类元素缺少其中任何一种,都会导致柑桔不同的生理病害和缺素症。但是,由于引起柑桔缺素症的生理病害种类较多,症状容易混淆,不易诊断确定,往往缺甲补乙,病症未除,反而加重。在现 Citrus trees in the process of growth and development, from the soil to absorb a large number of nutrients nitrogen, phosphorus, potassium, calcium, magnesium, sulfur; also absorb trace elements boron, zinc, iron, copper, aluminum and so on. The lack of any of the above two types of elements will lead to different physiological diseases and deficiency of citrus. However, due to the types of physiological diseases causing citrus deficiency syndrome more easily confused symptoms, not easy to diagnose, often lack of A, the disease is not removed, but increased. Now