[Objective] To evaluate the spatial variation and fertility suitability of vegetable field in Xi'an City

Shaanxi Province

in order to provide a basis for making decision of soil cultivation and agricultural production in relevant departments.[Methods] Six indexes that are closely related to vegetable growth including soil pH value

electrical conductivity

organic matter

alkali-hydrolysable nitrogen

available phosphorus and available potassium

were measured. Their spatial variability was analyzed using semi-variation function. And the soil fertility suitability was determined using fuzzy mathematics method. The soil fertility suitability was graded by equal spacing method after Kriging interpolation was conducted

and finally it was evaluated comprehensively.[Results] The semi-variogram could fit the spatial variability of soil in the vegetable field. The spatial distributions of the conductivity and alkali-hydrolysable nitrogen were mainly affected by the fertilization

and the soil pH value and other nutrient were affected by both anthropogenic and natural factors.[Conclusion] The soil fertility suitability of vegetable field in Xi'an City was at middle level

and the main limiting factors of vegetable growth were soil organic matter and alkali-hydrolysable nitrogen content. There are some areas where the soil fertility of vegetable field should be improved. These areas are the south-eastern of the Lintong District

the northern of the Huyi District and the Zhouzhi County

the northern part next to Chang'an District and the Huyi District. To the vegetable farmer

measures that can improve the contents of soil organic matter and nitrogen should be taken.