Yield and sugar accumulating capacities of Airén cultivar. A preliminary study

Junquera González, Pedro and José Prada, Eduardo de and Fresno, Juan Manuel del and Mejías, Juan Francisco and Lissarrague Garcia-Gutierrez, Jose Ramon (2015). Yield and sugar accumulating capacities of Airén cultivar. A preliminary study. In: "19es Journées GiESCO 2015", 31/05/2015-05/06/2015, Montpellier, Francia. p. 5.

Description

Title: Yield and sugar accumulating capacities of Airén cultivar. A preliminary study
Author/s:
  • Junquera González, Pedro
  • José Prada, Eduardo de
  • Fresno, Juan Manuel del
  • Mejías, Juan Francisco
  • 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

Airén is the most worldwide spread white grape cultivar, high yielding, well adapted to hot, dry conditions, and not very sensitive to fungal diseases. Its largest growing region is La Mancha, where Airén has been traditionally bush trained, spur pruned and grown with no irrigation. However, grape growing has evolved to meet the need for higher yields and harvest mechanization; and modern cultural practices train grape vines to simple multi-wire trellis systems, cane pruned, and usually irrigated. The aim of the present study was to evaluate the yield and sugar accumulating capacities of Airén cultivar with regard to leaf area, and to assess the influence that different yield components have on yield. In 2014, five commercial irrigated vineyards, located in La Mancha, of different ages, and grafted onto different rootstocks were selected for this study. Canopy surface area (SA) was measured at maturity. Berry weight and sugar concentration were measured during ripening on a weekly basis. Yield and yield components were determined at harvest. Values for shoot density ranged 2.3-5.1 shoots/m2; SA, 0.6-1.1 m2/m2; yield, 20-40 t/ha; fertility, 1.1-1.7 bunches/shoot; bunch weight, 450-650 g; berry weight, 2.5-2.9 g; and sugar concentration, 17-21 ºBrix. The number of bunches per shoot was the yield component that had the greatest influence on yield. The number of berries was the main contributing factor to bunch weight. A lineal relationship between SA/yield and sugar concentration was observed, with values of SA/yield ranging from 0.20 to 0.45 m2/kg. A ratio SA/yield of approximately 0.4 m2/kg was needed to reach a value of 20 ºBrix. Hence it would be necessary a SA of 12000 m2/ha, under the conditions of this study, to achieve a 30 t/ha yield, and a sugar concentration of 20 ºBrix. These results are a step forward in the study of the Airén cultivar, being of help for grape growers in the center area of Spain in order to maximize crop yield and sugar accumulation.

More information

Item ID: 42014
DC Identifier: http://oa.upm.es/42014/
OAI Identifier: oai:oa.upm.es:42014
Official URL: https://colloque.inra.fr/giesco-2015
Deposited by: Memoria Investigacion
Deposited on: 28 Jun 2016 15:10
Last Modified: 28 Jun 2016 15:10
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