%0 Journal Article
%T Leaf-to-Fruit Ratios in Vitis vinifera L. cv. ※Sauvignon Blanc§, ※Carmen豕re§, ※Cabernet Sauvignon§, and ※Syrah§ Growing in Maule Valley (Chile): Influence on Yield and Fruit Composition
%A Gast車n Guti谷rrez-Gamboa
%A Irina D赤az-Galv谷z
%A Nicol芍s Verdugo-V芍squez
%A Yerko Moreno-Simunovic
%J Agriculture | An Open Access Journal from MDPI
%D 2019
%R https://doi.org/10.3390/agriculture9080176
%X A trial was conducted during the 2005每2006 season in order to determine the effects of different leaf-to-fruit ratios on yield components and fruit composition in four Vitis vinifera L. cultivars. The treatments consisted of selecting shoots of four lengths (>1.3 m, 1.3每0.8 m, 0.8每0.4 m, and <0.4 m) with two crop levels (1每2 clusters/shoot), which allowed defining eight ratios. Berry composition and yield components were measured. The treatments affected the accumulation of soluble solids in ※Sauvignon blanc§, ※Cabernet Sauvignon§, and ※Syrah§, delaying it as the ratio decreased. All yield components were affected in ※Sauvignon blanc§, while bunch weight and the number of berries per bunch were altered without a clear trend. None of the yield components were affected in ※Cabernet Sauvignon§, while the lowest ratio presented the lowest number of berries per bunch in ※Syrah§. Total polyphenol index (TPI) was affected in ※Carmen豕re§ without a clear trend. A highly significant correlation was found between shoot length and leaf area in all studied cultivars. As the ratio increased, the shoot lignification increased in ※Sauvignon blanc§. However, studies must be conducted during more seasons to establish better conclusions about the effects of leaf-to-fruit ratios on yield and fruit composition. View Full-Tex
%U https://www.mdpi.com/2077-0472/9/8/176