Determination of the best harvest time of Cabernet Gernischet grape in Zhangye of Hexi Corridor
[Objective]The study aimed to determine the best harvest period of Cabernet Gernischet grapes in Zhangye region of Hexi Corridor in Gansu.[Method]The Cabernet Gernischet grapes in Zhangye production area of Hexi Corridor were used as materials,and six different harvesting periods were set up,fol-lowed by determining the soluble sugar,soluble solids,titratable acid,total phenols,tannins,sugar compo-nents and organic Acid components and other indicators,and then determined the optimal harvesting period of Cabernet Gernischet grapes in Zhangye production area by using the principal component analysis.[Result]With the delay of harvesting time,both the soluble solids and soluble sugar of Cabernet Gernischet grape fruit showed an up-forward trend,which reached the maximum at 106 DAF and were 24.53%and 24.03%,respectively;titratable acid,tartaric acid and malic acid content showed a down-forward trend.The contents of the three all reached the minimum values at 106 DAF,which were 0.63 mg/g,2.55 mg/g,and 2.15 mg/g,respectively.The total phenolic and tannin contents reached the maximum at 103 ADF,which were 23.13 mg/g and 6.45 mg/g,respectively,and then gradually decreased.Through principal com-ponent analysis of 16 indicators,it was concluded that the comprehensive quality of Cabernet Gernischet grapes harvested at 100 DAF,103 DAF and 106 DAF ranked in the top three.[Conclusion]The optimal harvest period of Cabernet Gernischet grape was from 100 DAF to 106 DAF,and the fruits harvested at 103 DAF was the best in the comprehensive quality.
NETL
NSTL
万方数据
维普
