Comprehensive Evaluation of Fruit Quality of Schisandra chinensis at Different Harvesting Periods Based on Principal Component Analysis
The Schisandra chinensis from 9 harvesting periods were used as experimental materials, effects of different harvesting periods on fruit appearance quality,nutrients and antioxidant activity of Schisandra chinensis were studied by principal component analysis and correlation analysis,in order to provide reference for breeding,processing and utilization of Schisandra chinensis varieties in the future.The results showed that the transverse diameter,longitudinal diameter and fruit weight of Schisandra chinensis increased gradually with the passage of harvesting period,and the other indicators showed different degrees of differences,but the overall trend was first increased and then decreased,and then increased at maturity.Correlation analysis showed that date was positively correlated with total sugar content,total antioxidant capacity,superoxide anion clearance rate, transverse and longitudinal diameter of fruit and fruit weight,positively correlated with total reducing power,negatively correlated with total phenol content and DPPH· clearance rate.Through principal component analysis,the comprehensive evaluation ranking of each picking period found that the comprehensive quality of Schisandra chinensis fruit on September 13th was the best.According to the above indexes,the middle of September was determined as the best harvest period,and the appearance of Schisandra chinensis was large,the proportion of seeds was large,the maturity was high,and the fruit indexes had better performance.
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