Travanic-Fuentes Zlavek, Gutiérrez-Gamboa Gastón, Moreno-Simunovic Yerko
Centro Tecnológico de la Vid y el Vino, Facultad de Ciencias Agrarias, Universidad de Talca, 2 Norte 685, Casilla 747, Talca 3460000, Chile.
INIA Carillanca, Instituto de Investigaciones Agropecuarias, km 10 Camino Cajón-Vilcún s/n, Temuco Casilla Postal 929, Temuco 4880000, Chile.
Plants (Basel). 2024 Sep 19;13(18):2617. doi: 10.3390/plants13182617.
Berry quality potential from a single vineyard is mainly defined based on some physicochemical parameters and subjective assessments. In this way, berry maturity variability would be a key factor affecting berry quality.
This trial aimed to study the effects of the maturity variability of berries harvested from plots of low (37,080 kg ha), middle (12,545 kg ha), and high (~1476 kg ha) quality potential on berry and wine physicochemical parameters of Cabernet Sauvignon in two consecutive seasons. The quality potential of the plots was defined by the winemakers considering mostly yield per hectare and the final price of their wines.
The berry heterogeneous maturity of soluble solids and berry weight in Cabernet Sauvignon was confirmed. The coefficient of variability (CV) of berry weight of high-quality plots was high at véraison and decreased as ripening progressed, reaching CV of 19.9% at harvest. Low-quality plots showed the lowest CV of berry weight in all the studied dates, whereas high-quality plots presented the lowest CV in soluble solids content of berries, reaching a 5.1% of variability at harvest. The physicochemical parameters showed that high-quality plots were characterized by high levels of soluble solids and phenolic maturity parameters, whereas samples from low-quality plots reached high berry weight and malic acid content. Berry differences among the physicochemical parameters determined wine quality, which allowed for plots to be classified by their potential quality at harvest.
Studying maturity variability of soluble solids and berry weight will allow for sampling to be sectorized within a vineyard to reduce the extremes of maturity that would affect wine quality and productive goals of winemakers.
单一葡萄园的浆果品质潜力主要基于一些理化参数和主观评估来界定。如此一来，浆果成熟度的变异性将是影响浆果品质的关键因素。
本试验旨在研究连续两个季节中，从低（约37,080千克/公顷）、中（约12,545千克/公顷）、高（约1476千克/公顷）品质潜力地块采收的浆果成熟度变异性对赤霞珠浆果和葡萄酒理化参数的影响。地块的品质潜力由酿酒师界定，主要考虑每公顷产量及其葡萄酒的最终价格。
证实了赤霞珠浆果可溶性固形物和浆果重量的不均匀成熟度。高品质地块浆果重量的变异系数（CV）在转色期较高，随着成熟进程而降低，收获时达到19.9%。低品质地块在所有研究日期中浆果重量的CV最低，而高品质地块浆果可溶性固形物含量的CV最低，收获时变异率达5.1%。理化参数表明，高品质地块的特征是可溶性固形物和酚类成熟参数水平较高，而低品质地块的样品浆果重量和苹果酸含量较高。浆果理化参数的差异决定了葡萄酒的品质，这使得地块能够根据收获时的潜在品质进行分类。
研究可溶性固形物和浆果重量的成熟度变异性将有助于在葡萄园进行分区采样，以减少影响葡萄酒品质和酿酒师生产目标的成熟度极端情况。
