Abstract:In order to investigate the soil nutrient status of citrus orchards in south-central Guangxi, 104 representative citrus orchards in 8 major citrus production counties(Wuming District, Debao County, Xixiangtang District, Laibin City, Long’an County, Mashan County, Shanglin County, Zhongshan County) in south-central Guangxi were selected for collecting soil samples and quantitative determination of the soil pH, the organic matter and mineral element content, etc, principal component and cluster analysis were performed. The results showed that the soil of citrus orchard in south central Guangxi was mainly acidic, and the rate of the most suitable slightly acidic soil(5.5≤pH<6.5) for the growth of citrus was only 19.2%. 49.0% of the citrus orchards were insufficient in organic matter. The contents of available N, Mg, Zn, Cu, B were generally insufficient, and the proportions below the optimum range were 51.0%, 93.3%, 93.3%, 89.4%, 92.3%, respectively. In particular, the deficiency of Mg and Zn were serious, and the proportions of the deficient level were 59.6% and 63.5%, respectively. Available P and Ca were mainly in the optimum range, the proportions above the appropriate range were 76.0% and 71.2%, respectively. The lack of soil available K coexisted with the excess, the proportions in insufficient, appropriate and exceeding level account for 42.3%, 24.0%, 33.7%, respectively. The contents of available Fe and Mn were rich, the proportions above optimum range were 83.7% and 89.4%, respectively. The result of principal component and cluster analysis indicated that the comprehensive soil nutrient status of orchards in Debao County, Zhongshan County and Wuming District were better than the other counties. Therefore, soil pH should be adjusted, and N, Mg, Zn fertilizers and organic fertilizer should be applicated appropriately. Furthermore, dosage of copper fungicides should be reduced, and B fertilizer application in a soil manner should be controlled, and the supplement and balance of P, Ca and K fertilizers should also be paid attention to.