3种产量水平下酿酒甜葡萄果实品质的差异

以湖南省怀化市刺葡萄品系中的甜葡萄(Vitis davidii Foex.cv.Tianputao)品种为试材,设置3个产量水平,分别为1 300 kg/667 m2 (L1)、1 900 kg/667 m2 (L2)、2 500 kg/667 m2 (L3),分别测定各产量水平下葡萄的总酸、还原糖、单体花色苷和非花色...

Effects of Three Loading Treatments on Quality Attributes in Spine Grape(Vitis davidii Foex.)Cultivar Tianputao

In this study,the spine grape cultivar Tianputao(Vitis davidii Foex.)from Huaihua,Hunan province was used as the experimental material.Three loading levels were set as follows:1300 kg/667 m²(L1),1900 kg/667 m²(L2)and 2500 kg/667 m²(L3).The main quality indicators of mature grapes such as total acid,reducing sugar,anthocyanins and non-anthocyanin monomeric phenolics were determined.Principal component analysis(PCA)was carried out on the fruit quality attributes.The results showed that:(1)total acid content increased with loading level for the two crop years 2014 and 2015,while the reducing sugar content decreased;(2)total anthocyanin content was the highest at L1 and L2 for 2014 and 2015,respectively,and the total content of basic anthocyanins was the lowest at L3 for both years;(3)for the two years,the total content of non-anthocyanin monomeric phenolic compounds and total flavonol content were both the highest at L2,followed by those at L1,and L3 gave the lowest values.Furthermore,principal component analysis(PCA)showed that the distribution of Tianputao under the three loading levels was consistent but there was clear discrimination in fruit quality between the two years.For both years,the content of phenols was the highest at L2.