关键词: 砷, 砷

Abstract: In order to well understand the soil suitability in Nanping tobacco-growing areas, the 18 nutrient indexes in 1101 soil samples collected from tobacco-growing areas were analyzed, and comprehensively evaluated by the methods of statistical method and fuzzy synthetic evaluation. The results indicated that, the soil suitability was medium to high in Nanping tobacco-growing areas, the integrated fertility index (IFI) was 0.628 and ranged from 0.575 to 0.665, the variation coefficient of IFI was 14.04%. The soil suitability could be classified into five grades, the areas of gradeⅢwas the biggest which accounted for 62.49%, and the areas of gradeⅠ-Ⅲaccounted for 80%; there was less discrepancy among different counties, the areas of gradeⅡ-Ⅳaccounted for more than 90%, the IFI values of Yanping and Pucheng were highest, and those of Jian’ou was lowest; 83.05% of towns belonged to gradeⅢ. Therefore, the fertilization suggestion of improving lime or calcium magnesium phosphate, increasing K, complementing B and Cl microelement fertilizer were recommended in Nanping tobacco-growing areas.