基于下部叶化学成分指标的烤烟产区灰色等权聚类

Grey equal weight cluster of flue-cured tobacco-growing areas based on chemical component indexes of lower leaves

为了探索烤烟等级替代、分组加工的理论基础,本试验采用灰色等权聚类法对18个烤烟产区的68份下部叶化学成分进行了聚类,结果表明,福建将乐县下部叶化学成分属于A类,为化学成分很协调区域,其他17个烤烟产区下部叶化学成分都属于B类,为化学成分协调区域.当某个聚类系数与其他聚类系数同时差异显著,且该聚类系数为最大时,综合聚类系数和一般聚类系数结果一致.采用总氮、氮碱比、糖碱比、氯和总挥发性酸5个化学成分指标与采用14个指标对烤烟产区进行灰色等权聚类的结果具有较好的相似性.采用平均值-标准偏差法确定白化函数的值域,能有效避免人为因素对聚类结果的影响.

In order to explore the theory basis of flue-cured tobacco grade substitute and grouping process, the test clustered 68 chemical component samples of 18 flue-cured tobacco-growing areas by grey equal weight cluster method. The results indicated that the chemical components of Jiangle county of Fujian province should be clustered A class which belonged to better region of chemical components, and other 17 flue-cured tobacco-growing areas should be clustered B class which belonged to good region of chemical components. The result of comprehensive cluster coefficient and common cluster coefficient was consistent when some cluster coefficient was distinguished difference with other cluster coefficients and it was the biggest. The cluster result was similar by applying 5 indexes including total nitrogen, the ratio of total nitrogen to nicotine, total sugar to nicotine, chlorine and volatile acid and 14 indexes. It could be avoided of influence on cluster results of factitious factor by applying mean-standard deviation method to confirm the values of albino function.