南平烟区植烟土壤适宜性的综合评价

Comprehensive Evaluation of Soil Suitability in Nanping Tobacco-growing Areas

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。

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 grade Ⅲ was the biggest which accounted for 62.49%,and the areas of grade Ⅰ-Ⅲ accounted for 80%;there was less discrepancy among different counties,the areas of grade Ⅱ-Ⅳ accounted 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 grade Ⅲ.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.