An Investigation and Assessment on the Soil Fertility Status of Kiwi Fruit Orchards in Dujiangyan

For better understanding the soil fertility status of the kiwifruit orchards in the major production areaof Dujiangyan region and evaluating soil environmental quality scientifically, this investigation selected nineorchards for soil sampling, and analyzed the soil pH, organic matter, and available N, P and K. Results showedthat the soils were obviously approach acid. Soil organic matter was relatively abundant, and 70.7% of the soilsamples were above 30 g/kg. Soil available N in 79.3% of the soil samples was above 120 mg/kg, and only 4.8%of them were low. Soil available P in 18.3% of the soil samples were in low status. Only 8.5% of the soilsamples showed low available K content. Overall, the spatial variability of orchard soil pH and organic matterwere low, and available P and K distributed unevenly. Soil nutrient properties in some orchards wereunbalanced. In addition, this survey showed that 56.1% of soil samples’ pH was less than 5.5, and the pH in32.9% of the samples were suitable for kiwi fruit growth; 76.9% of soil samples’ available N was above150 mg/kg; 62.2% of soil sample’s available P exceeded 50 mg/kg. Therefore, soil nutrient management ofkiwi fruit orchards should be improved. When applying fertilizer to kiwifruit orchard, we recommend thatimproving fertilization rates and the method to the need fertilizer law. Improve fertilizer utilization ratio toavoid non-point source pollution and soil environmental quality degradation of the orchards.