Using midday stem water potential for scheduling deficit irrigation in mid–late maturing peach trees under Mediterranean conditions

Mirás-Avalos, José Manuel; Pérez-Sarmiento, Francisco; Alcobendas, Rosalía; Alarcón, Juan José; Mounzer, O.; Nicolás, Emilio

doi:10.1007/s00271-016-0493-9

Cited by 43 publications

(23 citation statements)

References 44 publications

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“…In this sense, only Ψ s reflected well the effects of the different water restrictions on plant water status, even under mild levels of water deficit associated with low VPD (stage I of fruit growth) ( Table 2). For this reason, the use of Ψ s has been adopted for irrigation scheduling in stone fruits, establishing a threshold of -1.5 MPa during the post-harvest period for a moderate RDI strategy (Mirás-Avalos et al, 2016). Moreover, this indicator shows high sensitivity to water deprivation (Remorini & Massai, 2003) and has been reported to provide good predictions of the yield response to deficit irrigation (Intrigliolo & Castel, 2006).…”

Section: Discussionmentioning

confidence: 99%

Effects of regulated deficit irrigation on physiology, yield and fruit quality in apricot trees under Mediterranean conditions

Pérez-Sarmiento

Mirás-Avalos

Alcobendas

et al. 2017

Span. j. agric. res.

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Scarce water resources mainly in arid and semi-arid areas have caused an increasing interest for applying irrigation protocols aiming to reduce water spends. The effects of regulated deficit irrigation (RDI) on the performance of apricot trees (Prunus armeniaca L. cv. "Búlida") were assessed in Murcia (SE Spain), during three consecutive growing seasons (2008)(2009)(2010). The hypothesis was that RDI would not restrict yield but increase fruit quality while saving water. Two irrigation treatments were established: i) control, irrigated to fully satisfy crop water requirements (100% ET c ) and ii) RDI, that reduced the amount of applied water to: a) 40% of ET c at flowering and stage I of fruit growth; b) 60% of ET c during the stage II of fruit growth and c) 50% and 25% of ET c during the late postharvest period (from 60 days after harvest). Stem water potential, gas exchanges, trunk cross-sectional area (TCSA), fruit diameter, yield and fruit quality traits were determined. Vegetative growth was decreased by the use of RDI (12% less TCSA on average for the three years), whereas yield was unaffected. In addition, some qualitative characteristics of the fruits, such as the level of soluble solids, sweetness/acidity relation and fruit colour, were improved by the use of RDI. These results and average water savings of approximately 30%, lead us to conclude that RDI strategies are a possible solution for irrigation management in areas with water shortages, such as arid and semi-arid environments.Additional keywords: fruit growth; photosynthesis; Prunus armeniaca L.; regulated deficit irrigation; stomatal conductance; water stress.

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Section: Discussionmentioning

confidence: 99%

Effects of regulated deficit irrigation on physiology, yield and fruit quality in apricot trees under Mediterranean conditions

Pérez-Sarmiento

Mirás-Avalos

Alcobendas

et al. 2017

Span. j. agric. res.

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“…Other companies, such as the Spanish Verdtech (www.verdtech.es) and the Israeli Phytech (www.phytech.com), have developed automatic monitoring systems of SDV records. Examples of different approaches to scheduling different irrigation strategies from SDV records have been recently published for olive [141][142][143][144]), nectarine [121] and peach [145,146], among other species. These publications, together with that by Fernández [20], describe well the potential and limitations of the use of SDV records for irrigation scheduling.…”

Section: Stem and Fruit Diametermentioning

confidence: 99%

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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“…Irrigation scheduling with different plant-and climate-based water stress indicators has been reported on both late and early-maturing varieties of peaches, such as stem water potential [13], water supply index [14], and trunk diameter [15]. The downsides of these techniques are the need of intensive labor and additional irrigation equipment.…”

Section: Introductionmentioning

confidence: 99%

Influence of Irrigation Scheduling Using Thermometry on Peach Tree Water Status and Yield under Different Irrigation Systems

2017

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Abstract:Remotely-sensed canopy temperature from infrared thermometer (IRT) sensors has long been shown to be effective for detecting plant water stress. A field study was conducted to investigate peach tree responses to deficit irrigation which was controlled using canopy to air temperature difference (∆T) during the postharvest period at the USDA-ARS (U.S. Department of Agriculture, Agricultural Research Service) San Joaquin Valley Agricultural Sciences Center in Parlier, California, USA. The experimental site consisted of a 1.6 ha early maturing peach tree orchard. A total of 18 IRT sensors were used to control six irrigation treatments including furrow, micro-spray, and surface drip irrigation systems with and without postharvest deficit irrigation. During the postharvest period in the 2012-2013 and 2013-2014 growing seasons, ∆T threshold values at mid-day was tested to trigger irrigation in three irrigation systems. The results showed that mid-day stem water potentials (ψ) for well irrigated trees were maintained at a range of −0.5 to −1.2 MPa while ψ of deficit irrigated trees dropped to lower values. Soil water content in deficit surface drip irrigation treatment was higher compared to deficit furrow and micro-spray irrigation treatments in 2012. The number of fruits and fruit weight from peach trees under postharvest deficit irrigation treatment were less than those well-watered trees; however, no statistically significant (at the p < 0.05 level) reduction in fruit size or quality was found for trees irrigated by surface drip and micro-spray irrigation systems by deficit irrigation. Beside doubles, we found an increased number of fruits with deep sutures and dimples which may be a long-term (seven-year postharvest regulated deficit irrigation) impact of deficit irrigation on this peach tree variety. Overall, deployment of IRT sensors provided real-time measurement of canopy water status and the information is valuable for making irrigation management decisions.

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Using midday stem water potential for scheduling deficit irrigation in mid–late maturing peach trees under Mediterranean conditions

Cited by 43 publications

References 44 publications

Effects of regulated deficit irrigation on physiology, yield and fruit quality in apricot trees under Mediterranean conditions

Effects of regulated deficit irrigation on physiology, yield and fruit quality in apricot trees under Mediterranean conditions

Plant-Based Methods for Irrigation Scheduling of Woody Crops

Influence of Irrigation Scheduling Using Thermometry on Peach Tree Water Status and Yield under Different Irrigation Systems

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