柑桔是一种很有经济价值的水果,因其果实鲜美,汁多渣少,风味浓甜,营养丰富而深受人们的喜爱。我国福建、广东、广西、浙江、江西、湖南、云南、四川等省区盛产柑桔。但由于这些地区雨量充沛、土壤有效养分流失较严重。特别是红、黄壤柑桔园,长期被雨水冲刷淋洗,土壤瘠薄,酸性强,加上施肥水平低,有机肥少,缺素症普遍发生。其中缺硼、锌、镁较为常见。缺硼造成许多柑桔园落花落果严重,产量低、质量差,果园生产 Citrus is a very economic value of fruit, because of its delicious fruit, juicy less residue, sweet flavor, rich nutrition and loved by the people. China’s Fujian, Guangdong, Guangxi, Zhejiang, Jiangxi, Hunan, Yunnan, Sichuan and other provinces rich citrus. However, due to the abundant rainfall in these areas, the loss of available nutrients in the soil is more serious. In particular, red, yellow citrus orchards, long-term rinsing by the rain, soil infertility, strong acidity, coupled with low levels of fertilizers, less organic manure, the lack of common occurrence. One boron deficiency, zinc, magnesium are more common. Boron deficiency caused many citrus orchard fruit drop serious, low yield, poor quality, orchard production