Abstract:Soil samples were collected from 101 typical citrus orchards in 4 main citrus-planting areas of Yuxi City in Yunnan Province, and nutrient contents were measured. The 4 main citrus-planting areas are Nanpanjiang low-heat valley, Huaning hill and mountainous area, Yuanjiang dry-hot valley area and Xinping hill and mountainous area. The results showed that soil pH ranged from 3.98 to 8.07, 52.48% soil samples with sub-suitable pH for citrus growth and only 14.85% soil samples with pH suitable for citrus growth. Soil organic matter (SOM) was deficient and 59.40% soil samples were insufficient in SOM content. The average contents of available N, P, K, Ca, Mg, Fe, Mn, Zn, Cu and B were 78.64, 53.95, 273.15, 3 240.37, 233.39, 23.21, 43.82, 5.67, 2.89 and 0.50 mg/kg, respectively. In general, the insufficient proportions (deficiency and low grades) of available N and B were 78.22% and 66.34%, respectively. The exceeding proportions (high and excessive grades) of available K, Ca, Mn and Cu were 64.36%, 51.48%, 56.44% and 83.17%, respectively. Meanwhile, 67.31%, 75.24% and 88.12% of samples were abundant (suitable, high and excessive grades) in available P, Fe and Zn contents, respectively. The insufficient, suitable and exceeding proportions of available Mg were all about 1/3. As to the regional differences of soil nutrient status, Huaning was best, followed by Xinping and Yuanjiang, Nanpanjiang was worst. There were extremely significant positive correlation between soil pH with available Ca and Mg, and significant negative correlation between soil pH with available Mn and Cu. SOM was significantly positively correlated with most other soil nutrients. In conclusion, for fertilization management of citrus orchard, attention should be paid to adjust soil pH, increase the application of N, B and organic fertilizer, moderately reduce the application of K and P fertilizers, while reasonably control the application of Ca, Mn and Cu fertilizers.