Abstract:

In order to make clear soil nutrient status and variability characters, provide foundation for rational fertilization and citrus nutrient improvement, soil nutrient in citrus orchard of three gorges was studied, the effect of different areas and soil type on soil variability was analyzed. The result showed that the content of available P, K and Zn in citrus orchard were appropriate; alkaline N, organic matter and available B were deficiency; the content of available Fe, Mn and Cu were beyond the standard while coefficient of variation of soil nutrient was big so that excess and shortage were simultaneously being. Soil fertility of citrus orchard in Yongchuan, Jiangjin and Fengjie were better than other growing area in Chongqing. The effect of soil type on soil nutrient variability of available Mn were more than alkaline N, available P and K, which showed soil type was important factor to available Mn. The reason of soil nutrient variability between soil types should to be studied further.