Artem Victoria, Antoce Arina Oana, Geana Elisabeta-Irina, Ionete Roxana Elena
Research Station for Viticulture and Oenology Murfatlar, Calea Bucuresti str., no. 2, 905100 Murfatlar, Constanta, Romania.
University of Agronomic Sciences and Veterinary Medicine of Bucharest, Faculty of Horticulture, Department of Bioengineering of Horti-Viticultural Systems, 59 Mărăşti Ave., Sector 1, 011464 Bucharest, Romania.
J Food Sci Technol. 2022 May;59(5):1715-1726. doi: 10.1007/s13197-021-05182-6. Epub 2021 Jun 22.
In this work a comparative assessment was performed on individual and total polyphenols and biochemical properties of some Feteasca Neagra red wines obtained from grapes cultivated with different farming technologies (organic vs. conventional). The effect of a 30% cluster thinning treatment in both organic and conventional vineyard, compared to control plots with no thinning, was also monitored. The wines were obtained during two vintages, one with more favourable climatic conditions and one less favourable, in the period 2010-2019. Our results indicate that by applying a 30% cluster thinning treatment in the vineyard it is possible to increase the concentration of total and individual polyphenols of the resulted Feteasca Neagra wines. Furthermore, the differences observed between the phenolic profiles of wines from conventionally and organically produced grapes showed that organic Feteasca Neagra wines have higher phenolic compounds concentrations and antioxidant properties, with some important individual phenols accumulating in larger quantities than in the case of conventional wines. The beneficial effect of the organic cultivation is more evident in years characterised by less favourable climatic conditions. The statistical analysis tools applied to the analytical data allowed a good discrimination of experimental wine variants according to the vine cultivation technology (organic vs. conventional, with and without cluster thinning) and vintage. Thus, the results indicated that the applied cultivation technologies, especially when both organic cultivation and cluster thinning are combined, can greatly improve the polyphenolic content of Feteasca Neagra wines. The absolute value of the increase in polyphenol concentration was higher in favourable years, but the relative increase, in percentages, as compared to control wines, was higher in less favourable years. The combination of both viticultural practices may be thus exploited in order to obtain wines with higher polyphenolic content, which leads to better structure, better ageing potential, enhanced nutritional and antioxidant properties.
本研究对采用不同种植技术（有机种植与传统种植）种植的葡萄酿造的一些黑菲拉斯卡红葡萄酒的单个和总多酚以及生化特性进行了比较评估。还监测了在有机葡萄园和传统葡萄园中进行30%疏穗处理与未疏穗的对照地块相比的效果。这些葡萄酒是在2010 - 2019年期间的两个年份酿造的，一个年份气候条件较为有利，另一个年份则较为不利。我们的结果表明，通过在葡萄园进行30%的疏穗处理，可以提高所酿造的黑菲拉斯卡葡萄酒的总多酚和单个多酚的浓度。此外，传统种植和有机种植的葡萄所酿葡萄酒的酚类物质谱之间的差异表明，有机黑菲拉斯卡葡萄酒具有更高的酚类化合物浓度和抗氧化性能，一些重要的单个酚类物质的积累量比传统葡萄酒中的更大。有机种植的有益效果在气候条件不太有利的年份更为明显。应用于分析数据的统计分析工具能够根据葡萄种植技术（有机种植与传统种植、有无疏穗）和年份对实验葡萄酒变体进行良好的区分。因此，结果表明所应用的种植技术，特别是有机种植和疏穗相结合时，能够极大地提高黑菲拉斯卡葡萄酒的多酚含量。多酚浓度增加的绝对值在有利年份较高，但与对照葡萄酒相比，不利年份的相对增加百分比更高。因此，可以利用这两种葡萄栽培方法的组合来获得具有更高多酚含量的葡萄酒，从而使葡萄酒具有更好的结构、更好的陈年潜力、增强的营养和抗氧化性能。
