Abstract:In order to clarify the status and distribution of medium and micro nutrients in soils of citrus orchards in Hunan and to instruct the rational fertilization, 84 soil samples were collected from citrus orchards in 14 counties in Hunan, and the contents of medium and micro elements in the soil samples were measured. The results showed that 86.8% of soil samples were acidic or strongly acidic. 56.1% of soil samples were low in soil organic matter content. Soil exchangeable calcium and magnesium were more suitable for citrus growth, but the spatial distribution was imbalanced, and 56% and 53.6% of soil samples were insufficient in calcium content in southern and southwest Huan, respectively, and 64.3% of soil samples in southwest Hunan were insufficient in soil magnesium content. 80.8%, 86.9% and 64.3% of soil samples were high in the contents of effective sulfur, iron and manganese, respectively. The effective copper content was rich, but the spatial distribution was imbalanced, 76.9% and 78.6% of soil samples were higher in copper content in south and southwest of Hunan, respectively. 76.2% of soil samples were suitable in effective zinc. 85.5% of soil samples were deficient in effective boron. Only 53.9% of soil samples in southern Hunan were rich in effective molybdenum, while soil samples were suitable in effective molybdenum in northwestern and southwestern Hunan. Correlation were existed between soil pH and exchangeable calcium, magnesium and effective sulfur, between organic matter and available boron, zinc, and between other nutrients. Therefore, the distribution of medium and micro nutrients were imbalanced in soils of citrus orchards in Hunan, and problems are existed in all main regions planting citrus, which restrict the growth and development of citrus. Thus, it is suggested to adjust the soil pH, increase the application of organic fertilizer, combine the application of rhizosphere with foliar spraying, and appropriately supplement boron and zinc fertilizers.