Thermal imaging to detect spatial and temporal variation in the water status of grapevine (<i>Vitis vinifera</i>L.)

Grant, Olga M.; Ochagavía, Helga; Baluja, Javier; Diago, María P.; Tardáguila, Javier

doi:10.1080/14620316.2015.1110991

Cited by 59 publications

(37 citation statements)

References 33 publications

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“…Recently, however, the development of both cheaper image acquisition systems and user-friendly, powerful data image processing packages has substantially increased the potential of the method for irrigation scheduling in commercial orchards [55,56]. Thermal readings can be made both at the plant level (ground-based imagery) [55,57] and from above the crop (airborne imagery), after installing the sensors on towers or cranes [58,59], on unmanned aerial vehicles (UAVs), also known as remote piloted aerial systems (RPAS) [60], planes [61] or satellites [62,63]. Ground-based and airborne thermal images can be combined to assess within-orchard spatial heterogeneity in water status, as demonstrated with grape [64] and olive plants [65].…”

Section: Thermal Sensingmentioning

confidence: 99%

“…The user must also bear in mind that relationships between thermal readings and water-stress-related physiological variables must be determined to properly evaluate the information provided by thermal imagery [66,75]. The literature provides examples on the use of ground-based thermal imagery to detect water status changes in a variety of plants, from ornamental [76] to herbaceous [59,77] and woody crops [57,68,78].…”

Section: Ground-based Imagerymentioning

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: Thermal Sensingmentioning

confidence: 99%

Section: Ground-based Imagerymentioning

confidence: 99%

Plant-Based Methods for Irrigation Scheduling of Woody Crops

Fernández

2017

Horticulturae

139

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“…Análisis de varianza para el contenido de agua en el suelo y potencial hídrico foliar de tallo. Grant et al (2016) exponen la alta variabilidad de la temperatura del dosel vegetal, refiriéndose a hojas laterales y superiores, lo que se corresponde con la variabilidad obtenida con la adquisición de imágenes aéreas, en el presente trabajo. …”

Section: -Resultados Y Discusiónunclassified

“…Los efectos del riego y la fertirrigación han mostrado una buena correlación con las temperaturas obtenidas con las imágenes, frente a los valores del contenido de agua en el suelo, si bien no con los parámetros medidos en planta. Estos resultados sugieren determinar el crop water stress index (CWSI) para tener presente las condiciones climáticas y sus efectos sobre el viñedo, así como determinar relaciones útiles entre el estado hídrico de la planta y las temperaturas de las hojas superiores, como ha sido propuesto por Grant et al (2016).…”

Section: -Conclusiones Y Recomendacionesunclassified

EMPLEO DE IMÁGENES TÉRMICAS OBTENIDAS MEDIANTE UAVs PARA LA DETERMINACIÓN DEL ESTRÉS HÍDRICO EN VITIS VINIFERA (CV. ALBARIÑO)

Barrio¹,

Sanjurjo²,

Beiro³

et al. 2016

XXXIV Congreso Nacional De Riegos

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“…Conversely, LWP was more stable due to stomatal closure and the most leaves were exposed to sunlight around midday, thermal images contained the highest temperature differences and were suitable to assess the canopy water stress [122] . The other method for the separating canopy from background was simultaneously collect thermal and color images of canopy [123][124][125] . Thermal and color images were aligned registered, and then canopy can be extracted based on segmentation algorithms of color image processing.…”

Section: Water Stress Measurementsmentioning

confidence: 99%

Sensors for measuring plant phenotyping: A review

Qiu¹,

Wei²,

Zhang³

et al. 2018

International Journal of Agricultural and Biological Engineering

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Food crisis is a matter of prime importance because it becomes more severe as the global population grows. Among the solutions to this crisis, breeding is deemed one of the most effective ways. However, traditional phenotyping in breeding is time consuming and laborious, and the database is insufficient to meet the requirements of plant breeders, which hinders the development of breeding. Accordingly, innovations in phenotyping are urgent to solve this bottleneck. The morphometric and physiological parameters of plant are particularly interested to breeders. Numerous sensors have been employed and novel algorithms have been proposed to collect data on such parameters. This paper presents a brief review on the parameter measurement for phenotyping to describe its development in recent years. Some parameters that have been measured in phenotyping are introduced and discussed, including plant height, leaf parameters, in-plant space, chlorophyll, water stress, and biomass. And the measurement methods of each parameter with different sensors were classified and compared. Some comprehensive measurement platforms were also summarized, which are able to measure several parameters simultaneously. Besides, some deficiencies of phenotyping should be addressed, and novel methods should be proposed to reduce cost, improve efficiency, and promote phenotyping in the future.

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Thermal imaging to detect spatial and temporal variation in the water status of grapevine (Vitis viniferaL.)

Cited by 59 publications

References 33 publications

Plant-Based Methods for Irrigation Scheduling of Woody Crops

Plant-Based Methods for Irrigation Scheduling of Woody Crops

EMPLEO DE IMÁGENES TÉRMICAS OBTENIDAS MEDIANTE UAVs PARA LA DETERMINACIÓN DEL ESTRÉS HÍDRICO EN VITIS VINIFERA (CV. ALBARIÑO)

Sensors for measuring plant phenotyping: A review

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