Pedro José Blaya Ros

Pedro José Blaya Ros
Universidad Politécnica de Cartagena | UPCT · Departamento de Producción Vegetal

About

20
Publications
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156
Citations

Publications

Publications (20)
Article
Full-text available
Water is a limited resource in arid and semi-arid regions, as is the case in the Mediterranean Basin, where demographic and climatic conditions make it ideal for growing fruits and vegetables, but a greater volume of water is required. Deficit irrigation strategies have proven to be successful in optimizing available water without pernicious impact...
Article
Full-text available
The present work evaluates the main adaptive mechanisms developed by young sweet cherry trees (Prunus avium L.) to cope with drought. For this purpose, the young trees were subjected to two drought cycles with different water stress intensities followed by a recovery period. Three irrigation treatments were applied: control treatment (CTL) irrigate...
Chapter
Full-text available
El agua es un bien escaso, especialmente en las regiones áridas y semiáridas. Este es el caso de la Cuenca Mediterránea, donde sus condiciones demográficas y climáticas la hacen idónea para el cultivo de frutas y hortalizas, demandando un volumen mayor de recursos hídricos. Las estrategias de riego deficitario se han mostrado exitosas, pero resulta...
Article
Full-text available
The application of deficit irrigation techniques is essential in arid or semi-arid areas of the southeast of Spain, where water is a scarce and very costly resource. However, to apply these techniques, it is necessary to carry out preliminary tests on the specific crop in order to develop the models that allow the optimization of water use while ac...
Article
Full-text available
Infrared thermography has been introduced as an affordable tool for plant water status monitoring, especially in regions where water availability is the main limiting factor in agricultural production. This paper outlines the potential applications of low-cost thermal imaging devices to evaluate the water status of young and mature sweet cherry tre...
Article
Full-text available
The present work aims to assess the usefulness of five vegetation indices (VI) derived from multispectral UAS imagery to capture the effects of deficit irrigation on the canopy structure of sweet cherry trees (Prunus avium L.) in southeastern Spain. Three irrigation treatments were assayed, a control treatment and two regulated deficit irrigation t...
Article
The effect of a UV–C postharvest treatment (4 kJ m–2) on physicochemical quality, phenolic contents and total antioxidant capacity of ‘Prime Giant’ sweet cherry throughout 20 d at 2 °C (simulated cold storage during transportation period) plus 5 d at 15 °C (additional shelf life period) was studied. Furthermore, the effect of two regulated deficit...
Article
Full-text available
The reproductive response of fifteen year old sweet cherry trees (Prunus avium L.) combination ‘Prime Giant’/SL64 under Mediterranean climate to deficit irrigation was studied in a commercial orchard in south-eastern Spain for four seasons. Three irrigation treatments were assayed: (i) control treatment, irrigated without restrictions at 110% of se...
Article
Full-text available
The agronomic response of sweet cherry (Prunus avium L.) ‘Prime Giant’ to a 4 year-long experiment involving deficit irrigation strategies in a Mediterranean climate was studied in a commercial orchard located in the southeast of Spain (Jumilla, Spain). Four drip irrigation treatments were imposed: (i) control treatment (CTL), irrigated without res...
Article
Keywords: Fruit water potential Pedicel Postharvest fruit quality Stem water potential Water stress A B S T R A C T The performance of 'Prime Giant' sweet cherry trees under three different irrigation regimes was examined during two consecutive seasons, 2015-2016 and 2016-2017. The irrigation treatments evaluated were: (i) a control treatment (CTL)...
Article
Full-text available
Water is the main limiting factor in agricultural production as well as a scarce resource that needs to be optimized. The measurement of soil water with sensors is an efficient way for optimal irrigation management. However, commercial sensors are still too expensive for most farmers. This paper presents the design, development and calibration of a...
Article
A two-year experiment with sweet cherry (P. avium L. cv Prime Giant) trees was carried out to ascertain which of the following commonly used soil and plant water indicators is most effective for deficit irrigation scheduling: Ψstem (midday stem water potential), MDS (maximum daily branch shrinkage), gs (stomatal conductance), θv (soil volumetric wa...
Conference Paper
Full-text available
La creciente aplicación de la tecnología al control de los cultivos ha llevado al desarrollo de múltiples sistemas de medida del contenido de agua del suelo, permitiendo, de este modo, un uso eficiente de un bien tan escaso como es el agua. Sin embargo, el coste de estos equipos es elevado, lo que dificulta su uso masivo en el sector. Por este moti...
Conference Paper
Full-text available
La determinación de la evapotranspiración del cultivo (ETc) es un tema de gran importancia en la gestión del regadío. Numerosos autores han propuesto coeficientes y técnicas para la obtención de la ETc. Desde el punto de vista práctico, la ETc es directamente medible con técnicas de lisimetría, pero dada la gran complejidad y la poca escalabilidad...

Projects

Projects (2)
Project
This project aims to contribute to the necessary improvement of water management in woody crops of great interest to Spain and countries of the Mediterranean basin, such as almond tree under traditional farming system and high crop density and pomegranate, a crop in expansion and very well adapted to limiting conditions of water and its quality. The subproject is based on the need to have a precise knowledge of the response of the crop to water deficit, both physiological and agronomic, to develop criteria and strategies for scientific programming of Controlled Deficit Irrigation (RDC) and that, for its precise implementation, need equipment and tools that are easily accessible to the agricultural sector, such as low-cost sensors and models of automatic programming of irrigation. Through the objectives set, the aim is to study in depth the water relations in the soil-plant-atmosphere continuum by using new modelling techniques with the acquisition and statistical and mathematical treatment of more complete and transversal databases, where the surface temperature of the canopy and multispectral images play an important role. To facilitate this objective, the subproject contemplates as parallel objectives: i) the improvement of self-designed multiparametric sensors, ii) the assembly of a platform for research on plant indicators, that can be used for the automatic and controlled obtaining of a large number of thermal and multispectral images, iii) the integration of measurement nodes in wireless sensor network systems and iv) the design and training of a decision-making aid model (DSS), trained with indicators of the water status of the soil and plant for the automatic programming of irrigation. The marked final objective of this subproject aims to combine the advantages of the use of deficit irrigation strategies controlled in fruit crops of pomegranate and almond trees, in areas with low water availability, with the use of new technologies in the field of modeling and ICTs. The great sensitivity developed by farmers and entrepreneurs in semi-arid areas for the optimal use of water has generated an open mind to try and adopt new forms of management and acquisition of technologies that can result in a more efficient use of available water resources.
Project
The main objective of this subproject is to contribute to the improvement of agricultural water management in woody crops located at the Mediterranean basin. Carrying out an optimal water resources management requires to accurately know the crop response to water deficit at both physiological and agronomic levels. The Regullated Deficit Irrigation is a complex method since many factors, related to the Soil-Plant-Atmosphere continuum and its high variability should be taking into account. This is the reason for which reliable measurement systems that continuously measure plant and soil water status, on real time, should be developed and deployed, before automating the irrigation procedure. Even though there are many commercial sensors able to measure certain parameters that provide information about the soil water potential or the plant water status, and it would be ideal to use such information as support for decision making and irrigation automation, they are barely deployed in real crops, since their economical cost is high, signal management is difficult and properly defining thresholds is also rather hard. Because of this, the proposed project is focused on developing a technique that allows a suitable implementation of the RDI by considering three major issues: a) The need of designing appropriate sensors, measurement techniques and interfaces capable of measuring parameters that represent the amount of water in soil in a clear, easy-to-understand and more direct manner. Such sensors should be easy to install and they should deliver reliable measurements providing enough variability. b) The need of determining better indexes and signs to estimate the water stress in the studied crops, such as the CWSI that allows the information about top tree and air temperature to be acquired. Data acquisition and term-radiometry equipment installation should be made as easy as possible, by taking autonomous systems based on Wireless Sensor Networks (WSNs). c) The need of adopting DSS-Decision Support Systems that allow stakeholders to define the required parameters for reliably programming the RDI. Thus, techniques for managing big data volumes obtained from the Soil-Plant-Atmosphere continuum, and autolearning methods to adapt the variability of the received information, should be also considered and properly developed.