Video clip from Enoforum Web Conference - Presentations by Ana Hranilovic and Antonio Castro Marin
Two research presentations, one from Australia and one from Italy, propose interesting and sustainable oenological solutions to combat the lack of acidity in wines and microbial threats.
TIMING OF SHOOT THINNING IN VITIS VINIFERA: IMPACTS ON YIELD AND FRUIT COMPOSITION VARIABLES
Andrew G. Reynolds, Tony Molek and Christiane De Savigny
Many growers in the Niagara Peninsula of Ontario are reluctant to use canopy division to address high vigor in their vineyards. An alternative approach of delayed shoot thinning was explored. Pinot noir and Cabernet franc vines in Ontario were subjected to six different shoot-thinning timings, based on the Eichhorn and Lorenz phenological stages 9 to 31, during the 2001 and 2002 seasons. An additional double-prune treatment (retaining four canes at dormant pruning and removing two at fruit set) was imposed on Cabernet franc. Minor differences between treatments were observed in 2001 and 2002 with respect to yield, periderm formation, and vine size. However, the study was carried out primarily to assess the impact of these treatments on berry, must, and wine composition and canopy microclimate. Early shoot-thinning treatments on Pinot noir resulted in increased titratable acidity (TA) and soluble solids in berries and must. Early shoot-thinning treatments on Cabernet franc generally resulted in higher soluble solids and color intensity in berries, lower TA in musts, and higher color intensity, total phenolics, and total anthocyanins in wines. The double-prune treatment was characterized by higher soluble solids, hue/tint, color intensity, and total phenolics overall. Canopy assessment showed that treatments imposed after bloom produced lower leaf layer numbers and better leaf and cluster exposure than did the control and early shoot thinning, especially in Cabernet franc. Early shoot-thinning treatments induced higher leaf areas in both cultivars compared to later treatments. Double pruning resulted in lower leaf layer numbers and better leaf exposure and had no impact on mean leaf area or photosynthetic photon flux density. Despite reductions in canopy density, delayed shoot thinning appeared to lead to concomitant delays in fruit maturity in terms of soluble solids, anthocyanins, and phenolics. We recommend that you consult the full text of this article, which was published in the American Journal of Enology and Viticulture 56: 343-356. To see the full text of this paper, follow the link on the right.
The seasonal character of harvests limits winemaking considerably, especially oenological research. Thus, conserving sterile musts during the whole year to carry out experiments is certainly a very...
Igor, BAROJA-CAREAGA, University of the Basque Country - Elena, GARCÍA DE LA PEÑA, Ardoatek - Dario, CANTU, University of California, Davis - And one, ESTONBA, University of the Basque Country - I...
Alexandra LOWREY, University of Auckland, New Zealand Bruno FEDRIZZI, University of Auckland Rebecca JELLEY, University of Auckland Stuart MORROW, University of Auckland
Parpinello, G.P., Ricci, A., Serantoni, M., Balducci, A., Ragni, L., Versari, A.; University of Bologna, Italy
Proteins occurring in wine originate from several sources during the winemaking process. Protein content in wines ranges from traces up to hundreds of mg/L, and may cause physical instability in wh...
Manuel Meneghetti, DSMN, Università Ca’ Foscari Venezia
The sun, the main natural resource of our planet, has been studied in recent years optimizing materials, technologies and processes to obtain electrical energy thanks to the best renewable and clea...
Cookies are pieces of information that are stored on your device that you can delete or block at any time. The information we collect allows us to improve the service we offer you. No data is disclosed to third parties.
Technical cookies are necessary for the functioning of the site and take into account your browsing preferences, such as language.
Technical cookies
Analytical cookies refer to systems for statistical analysis, in anonymous and aggregate form, relating to the running of the site and user behaviour.
Analytical cookies
Failure to accept the optional cookies will not eliminate the display of any advertisements. You can change your preferences at any time by clicking on the icon in the bottom right-hand corner.