不同叶幕高度对赤霞珠干红葡萄酒品质的影响OA

To determine the optimal canopy height for'Cabernet Sauvignon'of Modified Vertical Shoot Positioning(M-VSP)cultivation in the Jinshan sub-region of the eastern foothills of Helan Mountain wine producing area,dry red wines were brewed from grape fruits with different canopy height treatments(T1(80 cm),T2(110 cm),T3(140 cm),T4(170 cm)).The physicochemical indexes,phenols,monomeric anthocyanins,color parameters,and volatile flavor substances of wines were analyzed using conventional detection methods,ultra-high performance liquid chromatography-tandem mass spectrometry(UPLC-MS/MS)and gas chromatography-mass spectrometry(GC-MS),and the quality of the dry red wine was comprehensively evaluated.The results showed that the total acid and volatile acid contents of wine in the T2 treatment were significantly higher than those in other treatments(P<0.05),which was conducive to the accumulation of total phenols and flavan-3-ols.The total contents and stability of 14 monomeric anthocyanins increased gradually with the increase of canopy height,and principal component analysis(PCA)based on monomeric anthocyanins could effectively distinguish wine samples from different canopy height treatments.The contents of 36 key aroma substances(relative odor activity value(ROAV)>1)of wine in T2 treatment were the richest,and its comprehensive quality evaluation was the highest.In conclusion,the recommended canopy height for'Cabernet Sauvignon'of M-VSP cultivation in the Jinshan sub-region was 110 cm.