Soil Nutrient Spatial Variability and Fertility Suitability Evaluation based on GIS in Camellia oleifera Forest of Guangxi Province

Using exponential sum assessment method and ordinary kriging interpolation method,based on490 soil samples and 15 nutrient indexes in Guangxi Camellia oleifera forest land,spatial variability and suitable areas were studied. According to soil nutrients suitability assessment index,the result of assessment divided soil nutrient suitability of Guangxi into three kind of suitable areas including suitable,less suitable and unsuitable areas. Most Camellia oleifera producing areas was in the optimum suitable areas of soil nutrient. Sanjiang,Rongshui,Rong'an three Counties considered as unsuitable areas which should improve soil nutrients status.

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