Preliminary assessment of the feasibility of using maximum daily trunk shrinkage for irrigation scheduling in lemon trees

García-Orellana, Y.; Ruiz-Sánchez, M.C.; Alarcón, Juan José; Conejero, Wenceslao; Ortuño, M.F.; Nicolás, Emilio; Torrecillas, A.

doi:10.1016/j.agwat.2006.12.008

Cited by 50 publications

(28 citation statements)

References 13 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%

Plant-Based Methods for Irrigation Scheduling of Woody Crops

Fernández

2017

Horticulturae

132

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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%

Plant-Based Methods for Irrigation Scheduling of Woody Crops

Fernández

2017

Horticulturae

132

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“…During recent years, developments in new equipment have led to irrigation management practices based on the continuous monitoring of climatic variables (Allen et al, 1998), plant-based parameters (Cohen et al, 2001;Jones, 2004;García-Orellana et al, 2007) or soil water content (Dane and Topp, 2002). The equipment used for soil water content monitoring includes devices to measure soil water potential, which is used for highfrequency irrigation management (Phene and Howell, 1984) and those based on electromagnetic techniques, which allow rapid, non-destructive and automatic measurements (Topp and Davis, 1985;Dean et al, 1987;Paltineanu and Starr, 1997).…”

Section: Introductionmentioning

confidence: 99%

Response of early-peach [Prunus persica (L.)] trees to deficit irrigation

Abrisqueta¹,

Tapia

Conejero³

et al. 1970

Span. j. agric. res.

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The effect of different irrigation strategies in water relations, vegetative growth and yield of early maturing peach trees, growing in Murcia, (Spain) was studied during two years. Treatments consisted on: a control T1, full irrigated (150% of ETc); T2, continuous deficit irrigation at 50% of ETc; T3, regulated deficit irrigation (RDI), irrigated at 100% of ETc only during stage III of fruit growth and 25% the rest of the growing season; and T4, with automatic control of irrigation based on capacitance FDR-type probe data, varying threshold values. The results indicated that irrigation deficits in T2 and T3 treatments induced the lowest soil water content and stem water potential (Ψ stem ) values during the postharvest period (e.g. ψ stem up to -1.8 MPa in T3 during summer 2008); thus, a reduction in trunk growth and pruning weight, respect to control treatment values, was noted in both years. Also, peach yield was significantly reduced in both deficit irrigated treatments. The greatest irrigation water saving in T3 treatment (≈60%) caused the higher water use efficiency values in this treatment. For these reasons, water deficit during the postharvest periods (extended in the early maturing varieties) must be limited if fruit yield is not to be reduced. Irrigation scheduling based on capacitance probes have become a useful tool in the control of soil water content. When threshold values were precisely defined, the slight water deficits limited only vegetative growth while maintaining similar peach yield to that of well irrigated trees.Additional key words: automatic irrigation; capacitance probes; neutron probe; soil water content; stem water potential; vegetative growth; yield. Resumen Respuesta del melocotonero extra-temprano al riego deficitarioSe estudió el efecto de distintas estrategias de riego deficitario en las relaciones hídricas, crecimiento vegetativo y producción de melocotoneros extratempranos 'Flordastar' en Murcia (España) durante dos años. Los tratamientos fueron: T1, control, riego diario al 150% ETc; T2, riego deficitario continuo (50% ETc); T3, riego deficitario controlado (100% ETc sólo durante la fase III de crecimiento del fruto y 25% ETc el resto del ciclo) y T4, control automáti-co del riego basado diferentes umbrales de contenido hídrico del suelo con sondas de capacitancia. El déficit hídrico en los tratamientos T2 y T3 indujo los valores más bajos de contenido de agua del suelo y de potencial hídrico de tallo (Ψ tallo ) durante la poscosecha (Ψ tallo = -1,8 MPa en T3, verano 2008); lo que provocó una reducción del crecimiento del tronco y peso de poda, respecto a los valores del tratamiento control, en los dos años. Además, la producción se redujo significativamente en ambos tratamientos. El tratamiento T3 resultó ser el más eficiente en el uso del agua debido al mayor ahorro de agua de riego (≈60%). Por estas razones, los déficits hídricos en poscosecha (muy larga en variedades tempranas) deben ser limitados si no se quiere afectar la producción. Las sondas de capacitancia s...

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“…Irrigation scheduling based on the signal intensity of MDS (MDS SI) has been carried out in adult lemon trees (García-Orellana et al, 2007) following the model suggested by Goldhamer & Fereres (2001). Ortuño et al (2009a) indicated that by maintaining MDS SI values close to unity, and avoiding drainage, the irrigation water applied can be considered as an estimate of actual water requirements of lemon trees.…”

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confidence: 99%

Diurnal variations in water relations of deficit irrigated lemon trees during fruit growth period

García-Orellana

Ortuño

Conejero

et al. 2013

Span. j. agric. res.

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Field-grown lemon trees (Citrus limon (L.) Burm. fil. cv. Fino) were subjected to different drip irrigation treatments: a control treatment, irrigated daily above crop water requirements in order to obtain non-limiting soil water conditions and two deficit irrigation treatments, reducing the water applied according to the maximum daily trunk shrinkage (MDS) signal intensity (actual MDS/control treatment MDS) threshold values of 1.25 (T1 treatment) and 1.35 (T2 treatment), which induced two different drought stress levels. Daily variations in leaf (Yleaf) and stem (Ystem) water potentials, leaf conductance, net photosynthesis, sap flow (SF) and trunk diameter fluctuations were studied on four occasions during the lemon fruit growth period. Ystem and Yleaf revealed a diurnal pattern in response to changes in evaporative demand of the atmosphere. Both water potentials decreased in response to water deficits, which were more pronounced in the T2 treatment. Ystem was seen to be a better plant water status indicator than Yleaf. The difference between the two values of Y (Ystem - Yleaf = DY) was closely correlated with sap flow, making it a suitable measure of leaf transpiration. Using the slope of this relationship, the canopy hydraulic conductance (KC) was estimated. When other continuously recorded plant-based indicators are not accessible, the concurrent measurement of leaf and stem water potentials at midday, which are relatively inexpensive to measure and user-friendly, act as sufficiently good indicators of the plant water status in field grown Fino lemon trees.

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Preliminary assessment of the feasibility of using maximum daily trunk shrinkage for irrigation scheduling in lemon trees

Cited by 50 publications

References 13 publications

Plant-Based Methods for Irrigation Scheduling of Woody Crops

Plant-Based Methods for Irrigation Scheduling of Woody Crops

Response of early-peach [Prunus persica (L.)] trees to deficit irrigation

Diurnal variations in water relations of deficit irrigated lemon trees during fruit growth period

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