Limitations of using trunk diameter fluctuations for deficit irrigation scheduling in almond orchards

Martín Palomo, M. J. and Corell González, Mireia and Girón Moreno, Ignacio and Andreu Cáceres, Luis and Trigo Córdoba, Emiliano and López Moreno, Y.E. and Torrecillas, Arturo and Centeno Muñoz, Ana and Pérez López, David and Moriana Elvira, Alfonso (2019). Limitations of using trunk diameter fluctuations for deficit irrigation scheduling in almond orchards. "Agricultural Water Management", v. 218 ; pp. 115-123. ISSN 0378-3774. https://doi.org/10.1016/j.agwat.2019.03.033.

Description

Title: Limitations of using trunk diameter fluctuations for deficit irrigation scheduling in almond orchards
Author/s:
  • Martín Palomo, M. J.
  • Corell González, Mireia
  • Girón Moreno, Ignacio
  • Andreu Cáceres, Luis
  • Trigo Córdoba, Emiliano
  • López Moreno, Y.E.
  • Torrecillas, Arturo
  • Centeno Muñoz, Ana
  • Pérez López, David
  • Moriana Elvira, Alfonso
Item Type: Article
Título de Revista/Publicación: Agricultural Water Management
Date: June 2019
ISSN: 0378-3774
Volume: 218
Subjects:
Freetext Keywords: Kernel filling; Maximum daily shrinkage; MDS; Trunk growth rate; TGR
Faculty: E.T.S. de Ingeniería Agronómica, Alimentaria y de Biosistemas (UPM)
Department: Producción Agraria
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Irrigation needs in mature almond orchards are very high. Although almond trees grow in rainfed conditions, the yield response is very sensitive to irrigation. Continuous monitoring of the water status could be an adequate tool to optimize deficit irrigation. In this sense, trunk diameterfluctuations appeared as a very promising indicator at the beginning of the century, but few data have been published. The aim of this work is to check threshold values of maximum daily shrikage (MDS) and identify possible limitations to their use in commercial orchards. The experiment was performed in a commercial farm in Dos Hermanas (Seville, Spain) during the 2017 season on a 7-years-old orchard (cv Vairo). The irrigation treatments were Control (100% ETc), sustained deficit irrigation (SDI) with a maximum seasonal irrigation of 100 mm and two regulated deficit treatments (RDI). Both RDI treatments (RDI-1 and RDI-2) were scheduled using the signal of maximum daily shrinkage (signal) and the midday stem water potential (SWP). In RDI-1, full irrigation conditions were provided before kernel filling and during postharvest, using the threshold values suggested in the bibliography. During kernel filling, the water stress level was designed to be -1.5 MPa (SWP) and 1.75 (signal). RDI-2 trees were irrigated using the same scheduling as RDI-1, but target water stress values were higher in kernelfilling (-2 MPa and 2.75) and with a maximum seasonal amount of water of 100 mm. SWP in Control trees was near the McCutchan and Shackel baseline for most of the season. None of the deficit treatments reached the signal values suggested. Moreover, the signal values were almost equal between treatments, with no water stress effect. The trunk growth rate (TGR) presented clear differences depending on the water status.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainAGL2016-75794-C4-4-RUnspecifiedAlfonso Moriana ElviraOptimización de recursos hídricos limitados en cultivos leñosos mediterráneos principales: olivo y almendro

More information

Item ID: 67926
DC Identifier: https://oa.upm.es/67926/
OAI Identifier: oai:oa.upm.es:67926
DOI: 10.1016/j.agwat.2019.03.033
Deposited by: Memoria Investigacion
Deposited on: 28 Sep 2021 12:44
Last Modified: 14 Jan 2022 14:07
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