Nuova pubblicazione: "Kaolin and Italian Natural Chabasite-Rich Zeolitite Mitigates Global Warming and influences the final color in Grapes and Wine"


High temperatures and the anomalous distribution of rainfall during the growing season may have a negative impact on grapevine yield and berry composition. In recent years, many studies have focused on the application of agronomical techniques to reduce the negative impact of heatwaves on secondary metabolites such as phenols. In particular, treatments with kaolin have shown positive effects on reducing canopy temperatures, enhancing the accumulation of anthocyanins. A study by the Department of Agricultural and Food Sciences, University of Bologna, analyzed kaolin and chabasite-rich zeolitites applications on cv. Sangiovese in order to verify the cooling effects on leaves and bunches, and the impact on gas exchange, yield parameters, berry composition, and on both chemical and sensory notes of wine. Minerals such as kaolin and chabasite-rich zeolites were sprayed twice around the veraison on the entire canopy at a 3% concentration showing that the application of the minerals was able to reduce the berry temperatures, without affecting vine gas exchange, yield, and soluble solid accumulation. Furthermore, the cooling effect determined an increase in anthocyanin on both the grapes and the wine. By applying two treatments close to veraison, a crucial stage during anthocyanin synthesis, the color of both grapes and wine improved without influencing their composition. In wine tasting, mineral wines stood out regarding greater color intensity and red fruity aroma according to the expert panel.


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