Evaluation of sap flow and trunk diameter sensors for irrigation scheduling in early maturing peach trees

Conejero, Wenceslao; Alarcón, J.J.; García-Orellana, Y.; Nicolás, Emilio; Torrecillas, A.

doi:10.1093/treephys/27.12.1753

Cited by 62 publications

(26 citation statements)

References 28 publications

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“…With that purpose, Goldhamer and Fereres [119] proposed what it is widely known as the signal-intensity approach. Basically, at the beginning of the irrigation season all the instrumented plants must be kept under non-limiting soil water conditions for enough days to calculate the so-called reference signal This approach has been tested in orchards of various fruit tree species, including almond [218], peach [219] and lemon [220], and has disadvantages for its use in commercial farms and orchards. First, it is difficult to define the threshold value [30].…”

Section: An Alternative To the Signal-intensity Approachmentioning

confidence: 99%

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Plant-Based Methods for Irrigation Scheduling of Woody Crops

Fernández

2017

Horticulturae

127

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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: An Alternative To the Signal-intensity Approachmentioning

confidence: 99%

“…They do not give reliable information, however, on the precise value of the irrigation dose. Thus, the new irrigation dose is normally determined from the previous one and increased or decreased by a certain percentage, which in most cases varies from 10 to 15% [7,219].…”

Section: An Alternative To the Signal-intensity Approachmentioning

confidence: 99%

Plant-Based Methods for Irrigation Scheduling of Woody Crops

Fernández

2017

Horticulturae

127

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“…2007), which are often supported by physiologically based monitoring tools, such as infrared thermometry (Grant et al. 2007), trunk diameter sensors (Conejero et al. 2007) or sap flow meters (Fernández et al.…”

Section: Improving Vineyard Water Use Efficiency By Crop Managementmentioning

confidence: 99%

Improving water use efficiency in grapevines: potential physiological targets for biotechnological improvement

Flexas¹,

Galmés

Gallé³

et al. 2010

Australian Journal of Grape and Wine Research

242

138

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Improving water use efficiency (WUE) in grapevines is essential for vineyard sustainability under the increasing aridity induced by global climate change. WUE reflects the ratio between the carbon assimilated by photosynthesis and the water lost in transpiration. Maintaining stomata partially closed by regulated deficit irrigation or partial root drying represents an opportunity to increase WUE, although at the expense of decreased photosynthesis and, potentially, decreased yield. It would be even better to achieve increases in WUE by improving photosynthesis without increasing water loses. Although this is not yet possible, it could potentially be achieved by genetic engineering. This review presents current knowledge and relevant results that aim to improve WUE in grapevines by biotechnology and genetic engineering. The expected benefits of these manipulations on WUE of grapevines under water stress conditions are modelled. There are two main possible approaches to achieve this goal: (i) to improve CO2 diffusion to the sites of carboxylation without increasing stomatal conductance; and (ii) to improve the carboxylation efficiency of Ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco). The first goal could be attained by increasing mesophyll conductance to CO2, which partly depends on aquaporins. The second approach could be achieved by replacing Rubisco from grapevine with Rubiscos from other C3 species with higher specificity for CO2. In summary, the physiological bases and future prospects for improving grape yield and WUE under drought are established. AbbreviationsRubisco ribulose-1,5-bisphosphate carboxylase/oxygenase; RuBP ribulose-1,5-bisphosphate; WUE water use efficiency; WUEC crop WUE; WUEleaf leaf-level WUE; WUEWP whole-plant WUE; WUEY yield WUE

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“…The use of yPD for evaluating plant water status and consequently for making decisions about irrigation is promising because the daily maximum rates of A and g as well as vegetative growth are related to yPD (Schultz 1996, Escalona et al 1999, Rodrigues et al 2008). Various proposals to substitute direct measurements of yPD have been made for perennial plants, using vegetative growth components (Pellegrino et al 2005), gas exchange parameters like g (Cifre et al 2005), continuous measurements of sap flow (Ginestar et al 1998, Conejero et al 2007 or trunk diameter fluctuations (Goldhamer andFereres 2004, Ortuño et al 2006) and, seemingly most related, midday measurements of yM and yST (Choné et al 2001, Williams and Araujo 2002, Girona et al 2006. Various proposals to substitute direct measurements of yPD have been made for perennial plants, using vegetative growth components (Pellegrino et al 2005), gas exchange parameters like g (Cifre et al 2005), continuous measurements of sap flow (Ginestar et al 1998, Conejero et al 2007 or trunk diameter fluctuations (Goldhamer andFereres 2004, Ortuño et al 2006) and, seemingly most related, midday measurements of yM and yST (Choné et al 2001, Williams and Araujo 2002, Girona et al 2006.…”

Section: Management Aspects Irrigation Systemsmentioning

confidence: 99%

Adoption of Environmental Innovations: Analysis from the Waipara Wine Industry

Gerling¹

2015

Environmentally Sustainable Viticulture

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The rapidly increasing world population and the scarcity of suitable land for agricultural food production together with a changing climate will ultimately put pressure on grape‐producing areas for the use of land and the input of resources. For most grape‐producing areas, the predicted developments in climate will be identical to becoming more marginal for quality production and/or to be forced to improve resource management. This will have a pronounced impact on grapevine physiology, biochemistry and ultimately production methods. Research in the entire area of stress physiology, from the gene to the whole plant and vineyard level (including soils) will need to be expanded to aid in the mitigation of arising problems. In this review, we elaborate on some key issues in environmental stress physiology such as efficient water use to illustrate some of the challenges, current limitations and future possibilities of certain experimental techniques and/or data interpretations. Key regulatory mechanisms in the control of stomatal conductance are treated in some detail and several future research directions are outlined. Diverse physiological aspects such as the functional role of aquaporins, the importance of mesophyll conductance in leaf physiology, night‐time water use and respiration under environmental constraints are discussed. New developments for improved resource management (mainly water) such as the use of remote sensing and thermal imagery technologies are also reviewed. Specific cases where our experimental systems are limited or where research has been largely discontinued (i.e. stomatal patchiness) are treated and some promising new developments, such as the use of coupled structural functional models to assess for environmental stress effects on a whole‐plant or canopy level are outlined. Finally, the status quo and research challenges around the ‘CO2‐problem’ are presented, an area which is highly significant for the study of ‘the future’ of the grape and wine industry, but where substantial financial commitment is needed.

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Evaluation of sap flow and trunk diameter sensors for irrigation scheduling in early maturing peach trees

Cited by 62 publications

References 28 publications

Plant-Based Methods for Irrigation Scheduling of Woody Crops

Plant-Based Methods for Irrigation Scheduling of Woody Crops

Improving water use efficiency in grapevines: potential physiological targets for biotechnological improvement

Adoption of Environmental Innovations: Analysis from the Waipara Wine Industry

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