Vine balance: a study case in Carménère grapevines

Abstract

Vitis vinifera cv. Carménère is a vigorous variety of grapevine that requires high temperatures and luminosity for achieving optimal phenolic maturity and herbal aromas, which has been reported to significantly delay harvest in Chile. This research was developed under the hypothesis that canopy management, vigor and crop load could modify the productive and vegetative relationships for obtaining early or late ripening and achieving vine balance. The aim of this study was to determine the vine balance and the time of ripeness for Carménère grapevines. Different vigor and canopy managements were evaluated. The study was conducted in the Central Valley of Chile during the 2007 to 2008 season with own-rooted Carménère vines trained to a four-cane vertical shoot position (VSP) located on high growth potential soil. The ripeness was delayed with high vigor and high crop load. In this growing condition, an early ripeness was reached with spur pruning, low vigor and by cluster thinning. In addition, the appropriate vine balance was only obtained in vines with low vigor and 50% cluster thinning. Together, these data demonstrate the vine balance of Carménère under these management conditions.

Raleio de cachos sobre o potencial enológico da uva 'Cabernet Franc' em duas safras

“…Vários estudos têm demonstrado que valores do Índice de Ravaz entre 4 e 7 são bons indicativos de videiras equilibradas, capazes de produzir frutas de qualidade (SILVA et al, 2009;FREDES et al, 2010 Nas diferentes intensidades de raleio, a redução dos cachos diminuiu o SS no mosto das uvas da cv 'Cabernet Franc' em relação à testemunha para a safra 2009/10 e não se observou diferença entre os tratamentos para a safra 2010/11 (Tabela 1). Verificou-se uma diminuição de 1,9ºBrix da maior para a menor produção na safra 2009/10, sendo este Ciência Rural, v.45, n.12, dez, 2015.…”

“…O equilíbrio entre esses dois parâmetros é determinante para a composição e a maturação das bagas. Pode-se manter o equilíbrio na relação fonte/ dreno através de técnicas de manejo do vinhedo, como podas, remoção de folhas ou raleio de cachos (REYNOLDS & WARDLE, 1989;SILVA et al, 2009;FREDES et al, 2010).…”

Effect of water application on wine quality and yield in 'Carménère' under the presence of a shallow water table in Central Chile

“…This situation would indicate permanent and effective activity of the vine plants' deep root systems, and that the presence of a shallow water table would permit root water uptake as sub-surface irrigation (Chai et al, 2016). The presence of a shallow water table in Chile has only been described by Fredes et al (2010) for 'Carménère' grapevines (phreatic level depth at 2 m), but this background information has not been considered in most authors' reports.…”

“…High soluble solids values were obtained at harvest for all treatments in the three seasons (23.0 to 26.9 °Brix), especially in [2005][2006]; these values are higher than the 24 ºBrix obtained for the same vine stock in the Maule Valley, Chile (Obreque-Slier et al, 2010), and the 24 to 25 ºBrix obtained in the Curicó Valley, Chile, for low vigor and low yield vine stocks (Fredes et al, 2010). However, values of up to 25.7 ºBrix for a late harvest were obtained in 'Carménère' grown in the Maipo Valley, Chile (Obreque-Slier et al, 2012).…”

Bud load management on table grape yield and quality – cv. Sugrathirteen (Midnight Beauty®)

“…\at 8 buds·stick -1 , whereas maximum yield was 18.26 t·ha -1 in pruning at 6 buds·stick -1 , and 17.25 t·ha -1 in 4 buds·stick -1 . It is well known that balance can be maintained in the ratio source/drain by using vineyard management techniques, such as pruning, leaf removal, or cluster thinning (Fredes et al 2010). Apparently, vigor induced by pruning at 6 buds was excessive, thus compromising yield.…”