CAJ | 학술논문

采用近红外光谱结合主成分分析（PCA）建立不同产地南丰蜜桔鉴别模型，实现不同产地南丰蜜桔的快速鉴别。分别研究一个果园内不同位置的蜜桔，洽湾、市山和白舍等南丰县三个不同乡镇的南丰蜜桔，福建邵武、广西柳城和江西南丰等三个不同省份的南丰蜜桔之间的差异，蜜桔保存时间对主成分分析模型的影响。结果表明同一个果园内不同位置的蜜桔不存在明显差别，不同产地的蜜桔有很好的分类效果，蜜桔的短时间保存对近红外光谱的主成分分析模型不会产生明显影响。不同的光谱预处理方法对主成分分析模型产生较大影响，多元散射校正（MSC）结合二阶导预处理得到的主成分分析投影具有最佳的分类效果。该研究可为南丰蜜桔的产地鉴别提供一种参考方法。
채용근홍외광보결합주성분분석（PCA）건립불동산지남봉밀길감별모형，실현불동산지남봉밀길적쾌속감별。분별연구일개과완내불동위치적밀길，흡만、시산화백사등남봉현삼개불동향진적남봉밀길，복건소무、엄서류성화강서남봉등삼개불동성빈적남봉밀길지간적차이，밀길보존시간대주성분분석모형적영향。결과표명동일개과완내불동위치적밀길불존재명현차별，불동산지적밀길유흔호적분류효과，밀길적단시간보존대근홍외광보적주성분분석모형불회산생명현영향。불동적광보예처리방법대주성분분석모형산생교대영향，다원산사교정（MSC）결합이계도예처리득도적주성분분석투영구유최가적분류효과。해연구가위남봉밀길적산지감별제공일충삼고방법。
The identification of Nanfeng mandarins from different origins was developed by using near infrared spectroscopy (NIR) and principal components analysis (PCA) .Mandarins from different places in one orchard ,and from different orchards in three towns of Nanfeng county were studied .Also differences among Shaowu ,Liucheng and Nanfeng were investigated .Fur-thermore ,the effect of storage time of mandarins on the PCA model was considered .The results demonstrate that there was no clear diversity of the mandarins in one origin but great differences existed among different ones .And the storage time of manda-rins played little role in the discrimination model .The method of multiple scattering correction (MSC) coupled with second de-rivative was selected to build PCA discrimination models compared with other data pretreatment methods .The proposed model would be a reference method for origin identification of Nanfeng mandarin .