Understanding olive adaptation to abiotic stresses as a tool to increase crop performance

Fernández, J.E.

doi:10.1016/j.envexpbot.2013.12.003

Cited by 174 publications

(117 citation statements)

References 265 publications

(366 reference statements)

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“…The decrease of g s can be due not only to soil drying but to increasing atmospheric demand. Also, variability of water distribution in the rhizosphere, not only changes in the average available soil water, may cause significant changes in stomatal closure and thus in g s [5]. Further details on the efficiency of g s as a water stress indicator, depending on the isohydric or anisohydric behaviour of the plant, are given in the next section.…”

Section: Daily Growth Dg µMmentioning

confidence: 99%

“…This allows for maximum benefits of the supplied irrigation amounts. Regulated deficit irrigation, however, is challenging because it requires both a sound knowledge of the physiological response of the crop to water conditions and precise assessment of plant water stress levels along the growing cycle [5]. Thus, precision irrigation has not been a suitable approach for farmers and orchardists until recently, when enough knowledge on major processes related to the impact of environmental conditions on the development and production of crops has become available, and advances in sensoring, monitoring and data transfer have been made.…”

Section: Precision Irrigationmentioning

confidence: 99%

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Plant-Based Methods for Irrigation Scheduling of Woody Crops

Fernández

2017

Horticulturae

139

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Abstract:The increasing world population and expected climate scenarios impel the agricultural sector towards a more efficient use of water. The scientific community is responding to that challenge by developing a variety of methods and technologies to increase crop water productivity. Precision irrigation is intended to achieve that purpose, through the wise choice of the irrigation system, the irrigation strategy, the method to schedule irrigation, and the production target. In this review, the relevance of precision irrigation for a rational use of water in agriculture, and methods related to the use of plant-based measurements for both the assessment of plant water stress and irrigation scheduling, are considered. These include non-automated, conventional methods based on manual records of plant water status and gas exchange, and automated methods where the related variable is recorded continuously and automatically. Thus, the use of methodologies based on the Scholander chamber and portable gas analysers, as well as those of systems for measuring sap flow, stem diameter variation and leaf turgor pressure, are reviewed. Other methods less used but with a potential to improve irrigation are also considered. These include those based on measurements related to the stem and leaf water content, and to changes in electrical potential within the plant. The use of measurements related to canopy temperature, both for direct assessment of water stress and for defining zones with different irrigation requirements, is also addressed. Finally, the importance of choosing the production target wisely, and the need for economic analyses to obtain maximum benefit of the technology related to precision irrigation, are outlined.

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Section: Daily Growth Dg µMmentioning

confidence: 99%

Section: Precision Irrigationmentioning

confidence: 99%

Plant-Based Methods for Irrigation Scheduling of Woody Crops

Fernández

2017

Horticulturae

139

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“…However, there also appears to have been no significant increase in fruit set by pruning. Fruit set depends in part on the quality of the flowers, since in the olive tree there are many staminate (imperfect) flowers due to pistil abortion (Cuevas et al, 1999;Fernández, 2014). In the few weeks following full bloom, a massive abscission of flowers and young fruits is observed (Rallo et al, 1981).…”

Section: Discussionmentioning

confidence: 99%

Olive tree response to the severity of pruning

Rodrigues¹,

Lopes²,

Ferreira³

et al. 2018

Turk J Agric For

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Pruning has been advocated for several purposes: in young trees, mainly to build a framework necessary to support fruit load (Vossen, 2007;Gregoriou, 2009;Therios, 2009); in mature trees, pruning is performed to maximize sunlight exposure and to maintain the equilibrium between vegetative and reproductive functions (Sibbett, 2005;García-Ortiz et al., 2008). Other relevant objectives assigned to pruning are to reduce the severity of and/or facilitate pest and disease control (Sibbett, 2005;Tombesi and Tombesi, 2007), to moderate the crop during an "on" year by pruning and to reduce alternate bearing (Vossen and Devarenne, 2007;Gregoriou, 2009), and to adjust the canopy to the training system and method of harvest (Sibbett, 2005;García-Ortiz et al., 2008;Therios, 2009). Older trees can be subjected to rejuvenating and regenerative pruning as a means of controlling tree growth and productivity (Sibbett, 2005;García-Ortiz et al., 2008).Being a technique with so many recognized benefits and with such good coverage in text books, it is difficult to understand the very limited literature published on the subject in the form of scientific papers. The authors of books and book chapters support their viewpoints

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“…La resistencia al estrés hídrico de los diferentes estados fenológicos está bastante bien documentada en la mayor parte de los cultivos y el olivo no es una excepción (Goldhamer, 1999). Sin embargo, aunque en base a esta información se sugieren manejos, incluso para las nuevas plantaciones superintensivas (Fernández, 2014) se conoce muy poco acerca de los umbrales de estrés hídrico a los que puede someterse a la planta.El RDC ha sido programado tradicionalmente en función de un porcentaje de la evaportanspiración del cultivo (ETc) en condiciones no limitantes. Sin embargo, la respuesta fisiológica de las plantas al estrés hídrico dificultad la modelización y estimación de la ETc.…”

Section: -Introducciónunclassified