1) La descarga del recurso depende de la página de origen
2) Para poder descargar el recurso, es necesario ser usuario registrado en Universia

Opción 1: Descargar recurso

Detalles del recurso


A study to assess the effects of the Partial Rootzone Drying (PRD) irrigation strategy in comparison to other irrigation systems was carried out in southern Portugal in two field-grown grapevines varieties, Moscatel and Castelão. We addressed the question of whether by regulating growth and plant water use, the PRD system would enable an equilibrated vegetative development, leading to a favourable capture of solar radiation for photoassimilate production and, at the same time to provide an optimum environment for fruit maturation. Three irrigation schemes were applied in addition to the non-irrigated (NI) vines: partial root drying (PRD), 50% of crop evapotranspiration (ETc), supplied to only one side of the root system while the other one was allowed to dry, alternating sides every 15 days; deficit irrigated (DI), 50% ETc supplied, half to each side of the root system and full irrigated (FI, 100% ETc). During the whole season FI plants of both varieties exhibited a high leaf predawn water potential (ψpd , ca –0.2 MPa) while a progressive decline was observed in NI plants, reaching ψpd values near –0.7 MPa at the end of August. PRD and DI presented intermediate values. PRD vines exhibited a stronger control over vegetative growth as compared with DI and FI plants. This was expressed by lower values of total leaf area at harvest, leaf layer number, canopy wideness and water shoots number, allowing a higher light interception at the cluster zone that induced an improvement in some berry quality characteristics. Watering had no significant effects on sugar accumulation in the berries but led to a favourable increase in the must titratable acidity, mainly in Castelão. Whereas in DI and FI treatments berry skin anthocyanins and phenols content were always lower than in NI, in PRD there was either no reduction or the reduction was much lower than in the other irrigation treatments. Water use efficiency (WUE) was increased by about 80% in PRD and DI when compared with FI, as a result of almost similar yields in the three treatments. Yield gains of irrigated plants in relation to NI were modest, explained by the rainy spring in both years.

Pertenece a

Repositório do ISPA Instituto Superior de Psicologia Aplicada  


Santos, Tiago P. -  Lopes, Carlos Manuel Antunes -  Rodrigues, M. Lucília -  Souza, Cláudia R. de -  Maroco, João -  Pereira, João Santos -  Silva, Jorge R. -  Chaves, Maria Manuela - 

Id.: 55780986

Idioma: eng  - 

Versión: 1.0

Estado: Final

Palabras claveBerry quality - 

Tipo de recurso: article  - 

Tipo de Interactividad: Expositivo

Nivel de Interactividad: muy bajo

Audiencia: Estudiante  -  Profesor  -  Autor  - 

Estructura: Atomic

Coste: no

Copyright: sí

: restrictedAccess

Requerimientos técnicos:  Browser: Any - 

Fecha de contribución: 07-dic-2014


* Functional Plant Biology, 30, 663-671
* 1445-4408

Otros recursos del mismo autor(es)

  1. Psychometric properties of the World Health Organization Quality of Life Instrument-Abbreviated version in Portuguese-speaking adults from three different countries To evaluate the validity, reliability and invariance of the World Health Organization Quality of Lif...
  2. ABCC1, an ATP Binding Cassette Protein from Grape Berry, Transports Anthocyanidin 3-O-Glucosides L'article original est publié par The American Society of Plant Biologists
  3. Cross-cultural validation of the brazilian portuguese version of the pain vigilance and awareness questionnaire Aims: To cross-culturally adapt the Pain Vigilance and Awareness Questionnaire (PVAQ) to the Brazili...
  4. Impact of inherent aspects of body image, eating behavior and perceived health competence on quality of life of university students The aim of this study was to assess the impact of inherent aspects of body image, eating behavior an...
  5. Time perception in mild cognitive impairment: interval length and subjective passage of time Objectives Patients with mild cognitive impairment (MCI) may have difficulties in time perception, w...

Otros recursos de la mismacolección

  1. Estimating bird and bat fatality at wind farms: from formula-based methods to models to assess impact significance info:eu-repo/semantics/publishedVersion
  2. A behavioural study on environmental enrichment in the common octopus, Octopus vulgaris cuvier, 1798 Dissertação de Mestrado apresentada ao ISPA - Instituto Universitário
  3. Understanding the mechanisms of antitropical divergencein the seabird White-faced Storm-petrel (Procellariiformes:Pelagodroma marina) using a multilocus approach Analytical methods that apply coalescent theory to multilocus data have improved infer-ences of demo...
  4. Enhancing carcass removal trials at three wind energy facilities in Portugal During the last years there has been a significant worldwide increase in the number of wind farms. T...
  5. Effect of Simulated Gastrointestinal Conditions on Biofilm Formation by Salmonella 1,4,[5],12:i:- Salmonella Typhimurium 1,4,[5],12:i:- is a major serovar responsible for human salmonellosis whose b...

Aviso de cookies: Usamos cookies propias y de terceros para mejorar nuestros servicios, para análisis estadístico y para mostrarle publicidad. Si continua navegando consideramos que acepta su uso en los términos establecidos en la Política de cookies.