Influence of the training system on the agronomic behavior and grape composition of Albariño in Rías Baixas apellation

Junquera González, Pedro and Tubío, Miguel and Rodiño, Xaquín and Lissarrague Garcia-Gutierrez, Jose Ramon (2015). Influence of the training system on the agronomic behavior and grape composition of Albariño in Rías Baixas apellation. In: "19es Journées GiESCO 2015", 31/05/2015-05/06/2015, Montpellier, Francia. p. 4.

Description

Title: Influence of the training system on the agronomic behavior and grape composition of Albariño in Rías Baixas apellation
Author/s:
  • Junquera González, Pedro
  • Tubío, Miguel
  • Rodiño, Xaquín
  • Lissarrague Garcia-Gutierrez, Jose Ramon
Item Type: Presentation at Congress or Conference (Article)
Event Title: 19es Journées GiESCO 2015
Event Dates: 31/05/2015-05/06/2015
Event Location: Montpellier, Francia
Title of Book: 19es Journées GiESCO 2015
Date: 2015
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Producción Agraria
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The aim of this study was to evaluate if early defoliation can be an alternative to bunch thinning in limiting yield and improving quality in grapes of the white cultivar Loureiro (Vitis vinifera L.), grafted onto 1103P. The field trial had been set up in a commercial vineyard in Vinhos Verdes Region (Northwest of Portugal, 41º 48? 53? N, 8º 24? 42? W). Treatments studied, performed five days before full bloom were: LR5 ? Leaf removal of the first five basal leaves, performed manually, LR8 ? Leave removal of the first eight basal leaves, LRM ? mechanical leaf removal and C ? the control, without defoliation. This paper reports the results of four years (2010-2013). The results presented a significant removal of main leaf area after defoliation principally in the most intensive treatment (LR8) but at harvest, the total leaf area had been compensated by lateral regrowth and no statistical differences between the treatments and the control were found. Early defoliation caused a decrease in fruit set and also a significant reduction in the diameter of the berry within the more severe defoliation treatments (LR5 and LR8). Yield factors were also significantly affected by the defoliation, causing a reduction of bunch weight and in 2013 a yield reduction in LR8 and LRM, and in 2010 in LR8. Conversely, LR5 presented a yield always similar to the control C. The reduction of cluster compactness and the substantial improvement of the microclimate at the cluster level significantly reduced bunch rot incidence in the defoliated modalities compared to control. No carry-over effects, along the four years trial were observed Early defoliation proved to be a canopy management technique that can have a strong impact in the final quality of grapes, reducing the compactness and lower the incidence and intensity of bunch rot, even if the reduction of yield observed in other papers had not been observed in all modalities.

More information

Item ID: 42011
DC Identifier: http://oa.upm.es/42011/
OAI Identifier: oai:oa.upm.es:42011
Official URL: https://colloque.inra.fr/giesco-2015
Deposited by: Memoria Investigacion
Deposited on: 28 Jun 2016 15:14
Last Modified: 28 Jun 2016 15:14
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