Опубликована: Янв. 1, 2023
This PhD thesis was supported by the Spanish Ministry of Science Innovation (project AGL2010-19201-C04-04), (PID2019–106226RBC22), National Research agency (PID2019-106226RB-C22/AEI/10.13039/501100011033), European Union (LIFE13 ENV/ES/000539) and International Joint Programming Actions 2017 contemplated in R&D&I Programme oriented towards challenges society Economy, Industry Competitiveness—National Agency (AEI) (PCIN-2017-091).
Язык: Английский
Agronomy, Год журнала: 2025, Номер 15(5), С. 1257 - 1257
Опубликована: Май 21, 2025
Monitoring the water status of fruit orchards is required to optimize crop management and determine irrigation scheduling. For this purpose, capacitance probes are commonly used measure soil content (θs). However, when these not calibrated, estimates θs are, therefore, unreliable. Our objective was relate measurements probes, without a site-specific calibration, with reliable indicator (stem potential at solar noon (Ψstem)) rain-fed grapevines grown under contrasting strategies (tillage spontaneous vegetation) irrigated peach pear trees. During 2023 growing season, monitored in orchard vineyard northeast Spain using sensors three depths: 0.15, 0.30, 0.45 m. Correlation coefficients ranged from 0.75 0.87 trees, 0.53 0.56 0.90 grapevines, depending on depth. These relationships were significant for both trees but Under conditions study, uncalibrated could be useful assess grapevine tree real time limited
Язык: Английский
Процитировано
0
Irrigation Science, Год журнала: 2024, Номер 42(5), С. 995 - 1011
Опубликована: Апрель 10, 2024
Abstract Stem water potential (Ψ stem ) is a key indicator for assessing plant status, which crucial in understanding health and productivity. However, existing measurement methods Ψ , characterized by destructiveness intermittency, limit its applicability. Microtensiometers, an emerging plant-based sensor, offer continuous monitoring capabilities have shown success certain vine tree species. In this study, we investigate the efficacy of microtensiometers ability to monitor cotton ( Gossypium hirsutum L.) under three distinct irrigation treatments Maricopa, Arizona, extremely hot, arid environment. We analyze diurnal dynamics across regimes compare these measurements with midday leaf potentials obtained using dewpoint potentiometer. Our results demonstrate that microtensiometer-derived closely follows known patterns tracking vapor pressure deficit (VPD) responding variations levels soil moisture content. Time cross-correlation analysis reveals 80-minute lag response changing VPD non-water limiting conditions, shortens water-limiting conditions. Additionally, establish robust linear relationship R 2 adj = 0.82) between strengthening as availability decreases. Notably, observe mean gradients 1.2 0.06 MPa vs. potentials, respectively. Moreover, data proves be more sensitive distinguishing earlier growing season compared temperature gas exchange parameters. These findings highlight utility valuable tools status smaller-stemmed row crops such cotton.
Язык: Английский
Процитировано
2
Agricultural Water Management, Год журнала: 2023, Номер 287, С. 108464 - 108464
Опубликована: Авг. 2, 2023
In a context of severe water scarcity and high uncertainty available irrigation water, the sustainable management inputs to crop has become necessary. The main objective present study was determine mid-term effect restrictions using different plant status indicators yield quality flat peaches. Two treatments were tested: (i) control (CTL), irrigated at ∼100% evapotranspiration (ETc) during entire season; (ii) regulated deficit (RDI) treatment, as CTL, except second fruit growth stage (∼70% ETc) late post-harvest (∼50% ETc), with same fertilization CTL. first periods, an average weekly reduction 43 109 m3 ha–1 achieved, respectively. This resulted in savings 33.6% RDI treatment respect well-irrigated trees increase productivity 45%, reaching values around 4.16 kg m–3. Therefore, optimization semi-arid conditions by considering that period this is non-critical phenological period, stem potential (Ψs) threshold value −1.4 MPa. Multiple regression models obtained thresholds based on Ψs for well- deficit-irrigated trees.
Язык: Английский
Процитировано
5
Plant and Soil, Год журнала: 2024, Номер unknown
Опубликована: Авг. 14, 2024
Abstract Background and aims Understanding the variation of root hydraulic conductance ( L p ) is critical for simulation soil–plant-atmosphere continuum (SPAC), but its monitoring remains challenging. In this study, we introduce a new non-destructive method characterizing dynamics in woody species through combination simultaneous determinations sap flow xylem water potential. Recent studies indicate that modern microtensiometers provide robust estimates potential, it unknown whether they allow tracking rapid changes potential without significant time lags, which may have implications proposed methodology. Methods The impulse response was measured lab, developing procedure correcting sensor data by deconvolution. Then, compensation heat pulse sensors were used to evaluate variations two well-watered olive trees during summer 2022 Cordoba, Spain. Results Correcting microtensiometer outputs analyze our field as strong stomatal oscillations occurred, with damping variations. By contrast, results suggest correction procedures not be required many practical applications like irrigation scheduling. daytime values close those obtained previous studies, while nighttime extremely low. Therefore, proportionality between rate observed, agrees although does prove causal relationship. Conclusions methods here could applied studying temporal other tree species.
Язык: Английский
Процитировано
1
Smart Agricultural Technology, Год журнала: 2024, Номер unknown, С. 100765 - 100765
Опубликована: Дек. 1, 2024
Язык: Английский
Процитировано
1
Опубликована: Ноя. 6, 2023
The modern cultivation of olive needs to be performant and sustainable. Stem water potential (SWP) is a key indicator implement precise irrigation increase system productivity, but it manual labor-intense measurement. New trunk-embedded microtensiometers allow measure trunk (TWP) continuously, in this study we report for the first time their performance olive. TWP values were generally higher than SWP measured with pressure chamber. both indicators showed very clear trend response similar relative changes. Overall, new technology looks promising further studies are needed.
Язык: Английский
Процитировано
1
Water, Год журнала: 2024, Номер 16(15), С. 2186 - 2186
Опубликована: Авг. 1, 2024
The continuous and reliable assessment of crop water status through indicators enables the sustainable management resources, especially in arid or semi-arid climate scenarios exacerbated by change. Therefore, main objective this study is to determine compare sensitivity indices derived from trunk diameter fluctuations for accurate automatic detection changes cherry trees. stress examined are maximum daily shrinkage (MDS), growth rate (TGR), early (EDS), late (LDS). During two growing seasons, ‘Lapins’ sweet trees were subjected different levels: (i) a control treatment irrigated at 115% evapotranspiration demand ensure non-limiting conditions, (ii) deficit irrigation treatment, with withholding cycles. Vegetative was affected stress. Trunk exhibited high variability did not clearly show differences plant status. Both EDS MDS showed third-degree polynomial relationship Ψstem. had lineal Ψstem up −1.4 MPa; however, further decreases necessarily lead increased MDS. In contrast, became non-linear −1.8 MPa, making it more useful indicator than when detecting severe conditions. frequencies both decreased 85% 35% increased. information provided frequencies, along their values, could be as tools
Язык: Английский
Процитировано
0
Acta Horticulturae, Год журнала: 2024, Номер 1409, С. 111 - 120
Опубликована: Ноя. 1, 2024
Язык: Английский
Процитировано
0
Biosensors, Год журнала: 2024, Номер 14(12), С. 583 - 583
Опубликована: Ноя. 30, 2024
The real-time monitoring of plant water status is an important issue for digital irrigation to increase productivity. This work focused on a comparison three biosensors that continuously evaluate status: trunk microtensiometers (MTs), time-domain reflectometry (TDR), and LVDT sensors. During the summer autumn seasons (DOY 150–300), nectarine trees were subjected four different consecutive periods based soil Management Allowed Deficit (MAD) concept, namely: MAD10 (light deficit); MAD50 (moderate MAD100 (severe deficit), MAD0 (full irrigation). Measurements stem potential (Ψstem) leaf gas exchange recorded representative days. A continuous measurement Ψtrunk, MDS, Ktrunk revealed deficits imposed soil. highest deficit observed at end period (Ψstem = −2.04 MPa Ɵv 17%) resulted in minimum value Ψtrunk (−1.81 MPa). maximum MDS (408 µm) was earlier than motivated by low sensitivity < −1.2 Ψstem −1.5 due decrease tissue elasticity when severe conditions are reached. Both more dependent content, while responsive environmental changes. weakest indicator determining status, although expressed as daily fraction depletion (KtrunkFD), it improved, evidencing process hysteresis. showed sensitivity, suggesting use MTs valuable biosensor agrosystems.
Язык: Английский
Процитировано
0
Agricultural Water Management, Год журнала: 2024, Номер 303, С. 109041 - 109041
Опубликована: Сен. 7, 2024
Язык: Английский
Процитировано
0