Grasas y Aceites, Vol 71, No 4 (2020)

Influence of irrigation and fertilization on the sterol and triterpene dialcohol compositions of virgin olive oil


https://doi.org/10.3989/gya.0795191

A. Arbonés
Uso Eficiente del Agua en Agricultura. Instituto de Investigación y Tecnología Agroalimentaria IRTA, Spain
orcid https://orcid.org/0000-0001-8111-9449

B. Sastre
Instituto Madrileño de Investigación y Desarrollo Rural, Agrario y Alimentario IMIDRA, Spain
orcid https://orcid.org/0000-0002-8300-7835

M. A. Pérez
Instituto Madrileño de Investigación y Desarrollo Rural, Agrario y Alimentario IMIDRA, Spain
orcid https://orcid.org/0000-0002-0196-1642

C. de Lorenzo
Instituto Madrileño de Investigación y Desarrollo Rural, Agrario y Alimentario IMIDRA, Spain
orcid https://orcid.org/0000-0001-9846-509X

M. Pascual
Departamento de Hortofruticultura Botánica y Jardinería. Universitat de Lleida, Spain
orcid https://orcid.org/0000-0002-3329-4207

A. Benito
Instituto Madrileño de Investigación y Desarrollo Rural, Agrario y Alimentario IMIDRA, Spain
orcid https://orcid.org/0000-0002-2256-0899

J. M. Villar
Departamento de Medio Ambiente y Ciencias del Suelo. Universitat de Lleida, Spain
orcid https://orcid.org/0000-0002-1068-8879

J. Rufat
Uso Eficiente del Agua en Agricultura. Instituto de Investigación y Tecnología Agroalimentaria IRTA, Spain
orcid https://orcid.org/0000-0002-7190-6147

Abstract


The objective of this work was to evaluate the influence of irrigation and fertilization with nitrogen and potassium on the sterol and triterpene dialcohol contents in two trials of cv. Arbequina in super-intensive orchards in Madrid and Lleida (Spain), using a completely randomized block design. No significant differences in total sterols between deficit and full irrigation treatments were observed. Under very dry conditions, the sterol levels from fully irrigated trees were higher than from rain-fed treatments and the triterpene dialcohol erythrodiol+ uvaol content was lower in the irrigated treatments in Lleida. In the fertilizer trial with full irrigation, total sterols were higher in the two N treatments compared to the unfertilized one; while erythrodiol + uvaol decreased. The application of K fertilizer had no effect on total sterol or triterpene dialcohol contents. A proper fertilization and irrigation are vital to obtain high quality EVOOs that meet the regulatory range in sterol and erythrodiol + uvaol contents.

Keywords


Arbequina; Deficit irrigation; Erythrodiol + uvaol; Nitrogen; Potassium

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