近红外光谱法无损识别林下山参及其生长年限

对不同生长年限的林下山参96支(其中，十五年生24支，十二年生72支)和园参177支。采集近红外光谱后，应用主成分分析-马氏距离法进行判别分析。采用原始光谱，经过预处理后，在全光谱范围内分别选择合适的主成分数，对林下山参和园参以及不同生长年限的林下山参分别建立了判别分析模型。所建立的两组模型对验证集的正确判别率均为100%。表明该方法准确可靠、快速无损，可实际用于林下山参的质量控制。

Nondestructive Identification of the Root of Mountain Cultivation Ginseng and Growth Years by Near Infrared Spectroscopy

Mountain cultivation ginseng(MCG) and garden cultivation ginseng(GCG) were identified by near infrared spectroscopy,so were MCG of different growth years.96 MCG samples of different growth years,including 24 of fifteen years and 72 of ten years,and 177 GCG samples were collected.After the near infrared spectra of these samples were collected,discriminant analysis was used to distinguish MCG and GCG,so was MCG of different years.After the original spectra were pretreated,discriminant analysis models of MCG and GCG,MCG of different growth years were developed respectively with selected principal component numbers in full spectra region.The correct discrimination rate of two groups of model was both 100%.The proposed methods are accurate,fast and nondestructive,and can be applied to the quality control of MCG.It has an important significance for building market image of MCG.