Midday measurements of leaf water potential and stomatal conductance are highly correlated with daily water use of Thompson Seedless grapevines

Williams, L.E.; Baeza Trujillo, Pilar y Vaughn, P. (2011). Midday measurements of leaf water potential and stomatal conductance are highly correlated with daily water use of Thompson Seedless grapevines. "Irrigation Science", v. 30 (n. 3); pp. 201-212. ISSN 0342-7188. https://doi.org/10.1007/s00271-011-0276-2.

Descripción

Título: Midday measurements of leaf water potential and stomatal conductance are highly correlated with daily water use of Thompson Seedless grapevines
Autor/es:
  • Williams, L.E.
  • Baeza Trujillo, Pilar
  • Vaughn, P.
Tipo de Documento: Artículo
Título de Revista/Publicación: Irrigation Science
Fecha: Mayo 2011
Volumen: 30
Materias:
Escuela: E.U.I.T. Agrícolas (UPM)
Departamento: Producción Vegetal: Fitotecnia [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

A study was conducted to determine the relationship between midday measurements of vine water status and daily water use of grapevines measured with a weighing lysimeter. Water applications to the vines were terminated on August 24th for 9 days and again on September 14th for 22 days. Daily water use of the vines in the lysimeter (ETLYS) was approximately 40 L vine−1 (5.3 mm) prior to turning the pump off, and it decreased to 22.3 L vine−1 by September 2nd. Pre-dawn leaf water potential (ΨPD) and midday Ψl on August 24th were −0.075 and −0.76 MPa, respectively, with midday Ψl decreasing to −1.28 MPa on September 2nd. Leaf g s decreased from ~500 to ~200 mmol m−2 s−1 during the two dry-down periods. Midday measurements of g s and Ψl were significantly correlated with one another (r = 0.96) and both with ETLYS/ETo (r = ~0.9). The decreases in Ψl, g s, and ETLYS/ETo in this study were also a linear function of the decrease in volumetric soil water content. The results indicate that even modest water stress can greatly reduce grapevine water use and that short-term measures of vine water status taken at midday are a reflection of daily grapevine water use

Más información

ID de Registro: 12062
Identificador DC: http://oa.upm.es/12062/
Identificador OAI: oai:oa.upm.es:12062
Identificador DOI: 10.1007/s00271-011-0276-2
URL Oficial: http://www.springerlink.com/content/16g60x6v18828764/
Depositado por: Memoria Investigacion
Depositado el: 14 Sep 2012 10:32
Ultima Modificación: 21 Abr 2016 11:14
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