Water stress thresholds for regulated deficit irrigation in pistachio trees : rootstock influence and effects on yield quality

Memmi, Houssem and Gijón López, María del Carmen and Couceiro, J. F. and Pérez López, David (2016). Water stress thresholds for regulated deficit irrigation in pistachio trees : rootstock influence and effects on yield quality. "Agricultural Water Management", v. 164-1 ; pp. 58-72. ISSN 0378-3774. https://doi.org/10.1016/j.agwat.2015.08.006.

Description

Title: Water stress thresholds for regulated deficit irrigation in pistachio trees : rootstock influence and effects on yield quality
Author/s:
  • Memmi, Houssem
  • Gijón López, María del Carmen
  • Couceiro, J. F.
  • Pérez López, David
Item Type: Article
Título de Revista/Publicación: Agricultural Water Management
Date: January 2016
ISSN: 0378-3774
Volume: 164-1
Subjects:
Freetext Keywords: Kc; Water relations; Stem water potential; Pistacia vera; Drought tolerance; Nut growth
Faculty: E.U.I.T. Agrícolas (UPM)
Department: Producción Agraria
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The response of "Kerman" pistachio trees budded on three different rootstocks (Pistacia terebinthus, Pista-cia atlantica and Pistacia integerrima) to regulated deficit irrigation (RDI) in shallow soils was studied for3 years. The trees were either fully irrigated (C treatment) or subjected to deficit irrigation during Stage IIof fruit growth with two water stress thresholds (T1 and T2). The irrigation scheduling for fully-irrigatedtrees and water-stressed trees was managed by means of midday stem water potential (?stem) measure-ments. The use of direct measurements of the water status allowed estimating accurately the irrigationrequirements for pistachio trees, with water reductions ranging from 46 to 205 mm in fully-irrigatedtrees. The combination of the ?stemuse and the RDI regime saved 43?70% in T1 and 48?73% in T2 ofwater compared to the calculated crop evapotranspiration (ETc) for fully irrigated treatment (C).Deficit irrigation during Stage II significantly reduced the vegetative growth of the trees. Yield and fruitquality were not affected by any irrigation regime, except during the first year of the study. Thus, theresults indicate that full irrigation scheduling and RDI can be achieved successfully using ?stemtool onpistachio trees growing in shallow soils. A ?stemthreshold of ?1.5 MPa during stage II (T1) was suggestedfor RDI scheduling, as it did not reduce the yield or the production value. However a ?stemthresholdof ?2.0 MPa (T2) resulted in a significant reduction and an extensive delay in the recovery of stomatalconductance (gl),with negative effects on long-term pistachio production.P. integerrima showed a weaker capacity of adaptation to the study conditions compared to P. atlanticaand P. terebinthus, having a tendency to get more stressed and to produce a lower quality crop.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainAGL2013-45922-C2-1-RUnspecifiedUnspecifiedManejo de la duración y el nivel de déficit hídrico en diferentes estados fenológicos para la mejora de la funcionalidad y calidad sensorial de la fruta en olivo y pistachero

More information

Item ID: 40715
DC Identifier: http://oa.upm.es/40715/
OAI Identifier: oai:oa.upm.es:40715
DOI: 10.1016/j.agwat.2015.08.006
Official URL: https://doi.org/10.1016/j.agwat.2015.08.006
Deposited by: Memoria Investigacion
Deposited on: 06 Jul 2016 12:12
Last Modified: 14 Mar 2019 14:38
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