基于主成分分析的不同种鲜食葡萄品质评价

Quality evaluation of different table grape based on principal component analysis

为更加准确地评价鲜食型葡萄的品质,选择了南方种植与售卖的18种鲜食葡萄,对其果实的14个基本品质指标进行检测,并进行感官评分和相关性分析,采用主成分分析法建立了综合得分数学模型。结果表明,不同品种鲜食葡萄各品质指标间含量差异明显,其中硬度差异最大(变异系数为51.18%);相关性分析显示各指标间存在独立性和一定程度的相关性;主成分分析提取了4个主成分因子,累积贡献率达到了88.63%;综合得分显示葡萄品质最好的为黑提、阳光玫瑰、魏可、红地球和巨玫瑰,巨峰、红宝石和金手指品质相对较差。

The study was to accurately evaluate the quality of table grape,18 different varieties of table grapes were selected.14 basic quality indicators were measured and analyzed by sensory scores and correlation analysis.Principal component analysis was employed to build a composite score mathematical model.The results showed that there was a significant difference in the quality indexes among different grape varieties,among them,hardness difference was largest（coefficient of variation is 51.18%）.Correlation analysis showed that there was an independence and a certain degree of correlation between indicators.Principal component analysis was extracted from 4 principal component factors, and cumulative contribution rate reached 88.63%.The comprehensive score comfirmed that the best grape was Black Grape,Shine-Musca,Wink and Jumeigui;The quality of Kyoho Grape,Ruby Seedless and Gold finger were relatively poor.