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柑桔是一类对高锰胁迫比较敏感的木本植物，其锰中毒症常发生于酸性土壤或矿区土壤桔园，当柑桔叶中锰含量高于１００ｍｇ／ｋｇ时，柑桔即表现出明显的锰中毒症状，叶片不均匀退绿，并伴有褐色枯死斑点，老叶易落，根系生长受阻，柑果产量和品质显著下降。实践证明，施用石灰及钙、镁、硅等肥料，以及叶面喷施铁盐或硅酸钠溶液是有效平抑柑桔锰毒的有效措施。
Citrus is a type of woody plants that are sensitive to high manganese stress. Manganese poisoning often occurs in orange soil in acid soil or mining area. When the content of manganese in citrus leaves is higher than 100mg / kg, citrus shows Significant symptoms of manganese poisoning, uneven green leaves, and accompanied by brown dead spots, easy to fall old leaves, root growth retardation, citrus fruit yield and quality decreased significantly. Practice has proved that the application of lime and calcium, magnesium, silicon and other fertilizers, as well as foliar spray iron or sodium silicate solution is an effective measure to stabilize citrus manganese poisoning.