施甸烟区植烟土壤肥力适宜性评价

Suitability Evaluation of Soil Fertility for Flue-cured Tobacco Growth in Shidian

该文对在2003-2013年间施甸县1 225个土壤样品的9项指标进行了测试分析，并利用模糊数学原理和多元统计方法进行了综合评价。结果表明：全县土壤肥力存在较大差异，甚至有的土壤有机质、碱解氮、速效磷、速效钾、有效硼、有效锌、水溶性氯极度缺乏；全县土壤肥力综合指标值平均为0．623，变幅为0．199～0．928，变异系数为19．74％，其中Ⅰ、Ⅱ、Ⅲ、Ⅳ级土壤所占比例分别为16．08％、54．04％、27．02％、2．86％，水长、仁和的I～Ⅲ级土壤达100％。因此，施句烟区在足量施用有机肥的基础上，控氮，增磷钾，补施氯硼锌，以实现烟区土壤养分平衡。

9 nutrient indexes of 1225 soil samples collected in Shidian during 2003-2013 are analyzed,and the situation of soil fertilization was comprehensive by the methods of multivariate statistical analysis and principles of fuzzy mathematics.Results showed that there exist significant variation for the soil fertility of Shidian tobacco growing areas, and the content of the organic matters alkaline nitrogen, available phospho- rus,available potassium,available boron,available zinc,and water-soluble chlorine in some places were defi- cient. The integrated fertility index（IFI）values in Shidian tobacco ranged from 0.199 to 0.928,with the mean of 0.623 and the coefficient of variation of 19.74%. The proportion of grade Ⅰ , Ⅱ ,Ⅲ and Ⅳ were 16.08%, 54.04%, 27.02%, and 2.86%, respectively. The ratio of the grade from Ⅰ to Ⅲ in Shuichang, and Renhe tobacco station were up to 100%. Therefore,in this area we should increase organic fertilizer and P, K,B,C1 and Zn fertilizer,at the same time we control quantity of N element,which would realize soil nutri- ent balance in Shidian tobacco-growing areas.