江西省南丰县的南丰蜜橘种植面积现在已发展到2万hm2,90%以上都开发在红砂岩及花岗岩发育的红壤上。这些红土壤水溶态硼含量很低,一般为0郾1～0郾16mg/kg,低于0郾25mg/kg的严重缺硼界限。由于土壤营养元素供应不平衡,使柑橘营养体系失去平衡,造成缺硼病。笔者认为,必须把对柑橘 Nanfeng County, Jiangxi Province, Nanfeng honey cultivation area has now grown to 20000hm2, more than 90% are developed in red sandstone and granite red soil development. The boron content of water-soluble red soil is very low, generally 0 郾 1 ~ 0 郾 16mg / kg, less than 0 郾 25mg / kg of serious boron deficiency limits. As a result of imbalanced supply of nutrients in the soil, citrus nutrition system is out of balance, resulting in boron deficiency disease. I believe that we must put the citrus