南平烟区植烟土壤适宜性的综合评价

为进一步了解南平烟区植烟土壤适宜性，测定了1101份植烟土壤样品的18项土壤理化性状指标，并运用模糊数学隶属函数模型进行了适宜性综合评价。结果表明：南平烟区土壤适宜性中等偏上，综合评价指标值(IFI)在0.575~0.665之间，平均为0.628，CV为14.04%，按5个等级划分则以Ⅲ级土壤面积最大，占62.49%，而Ⅰ~Ⅲ级土壤占80%；各县（市、区）差异较小，Ⅱ~Ⅳ级土壤均占90%以上，其中以延平和浦城最高，建瓯最低；全市有83.05%的乡（镇、街道）适宜性平均水平属于Ⅲ级。因此，南平烟区烤烟施肥应注意施用石灰或钙镁磷肥，同时应增施钾肥，补充硼和氯等微肥。

Comprehensive Evaluation of Soil Suitability in Nanping Tobacco-growing Areas

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.