无釉陶缸协同橡木处理对葡萄酒陈酿品质的影响

Effect of unglazed pottery jar combined with oak treatment on wine aging quality

为研究新型无釉陶缸结合不定型橡木片对葡萄酒的陈酿效果,分别以玻璃缸、橡木桶为对照,研究不同容器陈酿葡萄酒过程中溶解氧含量的变化,考察无釉陶缸协同不同添加量的橡木片处理对葡萄酒的品质及挥发性风味成分的影响,并基于挥发性风味成分结果进行正交偏最小二乘判别分析(OPLS-DA)。结果表明,葡萄酒在陈酿过程中,溶解氧先迅速下降,后期保持相对稳定;无釉陶缸陈酿葡萄酒的溶解氧含量变化规律与橡木桶类似,其稳定期溶解氧含量维持在0.30~0.35 mg/L,与橡木桶差异不显著;无釉陶缸协同橡木片处理最适橡木片用量为0.4 g/L,具有类似橡木桶的陈酿效果,其对葡萄酒的理化性质的影响较小,并能提升花青素、花色苷的保存率。无釉陶缸协同橡木片和橡木桶处理的葡萄酒,二者有着相似的香气特征。OPLS-DA结果表明,经橡木桶和无釉陶缸协同橡木片的陈酿葡萄酒差异不大,但明显区别于新酒。

To study the effect of a new type of unglazed pottery jar combined with irregular oak chips on wine aging,using glass jar and oak barrel as controls,the changes in dissolved oxygen content were studied during the aging process of wine in different containers.The effect of the combination of unglazed pottery jar and different amounts of oak chips on the quality and volatile flavor components of wine was investigated,and the orthogonal partial least squares discriminant analysis(OPLS-DA)was conducted based on the results of volatile flavor components.The results showed that during the aging process of wine,dissolved oxygen rapidly decreased at first and remained relatively stable in the later stage.The variation pattern of dissolved oxygen content in wine aged with unglazed pottery jar was similar to that of oak barrel,with the dissolved oxygen content maintained at 0.30-0.35 mg/L during the stable period,and there was no significant difference with oak barrels.The optimal amount of oak chips for the treatment of unglazed pottery jar in collaboration with oak chips was 0.4 g/L,which had a similar aging effect to oak barrel.It had a small impact on the physical and chemical properties of wine and could improve the preservation rate of anthocyanidins and anthocyanins.The wine processed with unglazed pottery jar combined with oak chips and oak barrel had similar aroma characteristics.The OPLS-DA results showed that there was no significant difference in wine aged in oak barrel and unglazed pottery jar combined with oak chips,but the wine was significantly different from new wine.