用电子鼻验证有机栽培提高赤霞珠葡萄酒挥发性特征

V. Artem, A. Antoce
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摘要

赤霞珠(Cabernet Sauvignon)是非常适合有机栽培的葡萄品种之一。本研究在Murfatlar地区对该品种进行了有机栽培和常规栽培技术的比较研究。此外,对于每个生长系统变异有和没有30%的集群细化组织。通过使用电子鼻对从每个变种中获得的葡萄酒进行比较。用电子鼻根据酒的挥发性特征和确定的鉴别色谱峰对同一工艺制备的酒进行鉴别。由传统种植的葡萄生产的葡萄酒被区分为两组不同的化合物,这些化合物与是否应用簇间减操作相关,而来自有机葡萄的葡萄酒仅在有或没有簇间减的组中稍微分开。然而,就鉴别峰的数量而言,有机葡萄酿造的葡萄酒显示出最高的复杂性。因此,这项初步研究表明,葡萄的有机栽培可能对赤霞珠葡萄酒有益。葡萄簇变薄的操作对用传统种植的葡萄酿造的葡萄酒有一定的影响,但即使在这种情况下,只有7.6%的挥发性变化可以用葡萄簇变薄来解释。考虑到赤霞珠的葡萄产量与其他品种相比普遍较低,进一步减少葡萄负荷可能在经济上不合理。
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Enhancement Of Cabernet Sauvignon Wine Volatile Profile By Organic Cultivation Confirmed With An Electronic Nose
Abstract Cabernet Sauvignon is one of the grape varieties highly suitable for organic cultivation. In the present study, the variety was cultivated in Murfatlar region were both organic and conventional technologies are applied and compared. Also, for each growth system variants with and without 30% cluster thinning were organized. Wines obtained from each variant were compared by the use of an electronic nose. The groups of wines prepared by the same technology were discriminated by the electronic nose in accordance to their volatile profile and on the basis of the discriminating chromatographic peaks determined. The wines produced from grapes conventionally grown were discriminated in two groups by different compounds correlated to the application or not of the cluster thinning operation, while the wines from organic grapes were only slightly separated in groups with or without cluster thinning. However, the wines from organic grapes have shown the highest complexity, as far as the number of discriminant peaks is concerned. Thus, this preliminary study suggests that organic cultivation of grapes may be beneficial for Cabernet Sauvignon wines. The operation of cluster thinning has some effects on the wines made with conventionally grown grapes, but even in this case only 7.6% of the variability in the volatile profile is explained by the cluster thinning. Considering that the grape yield of Cabernet Sauvignon is generally low as compared to other varieties, a further reduction of the grape load may be economically unjustified.
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