Related Papers
Temperatura radiométrica de follaje como indicador del estatus hídrico del cultivo de papa (Solanum tuberosum L.) en La Molina - Perú
2018 •
Javier Rinza Díaz
Universidad Nacional Agraria La Molina. Escuela de Posgrado. Maestria en Meteorologia Aplicada
Sensors
Development of an Open-Source Thermal Image Processing Software for Improving Irrigation Management in Potato Crops (Solanum tuberosum L.)
Roberto Quiroz
Accurate determination of plant water status is mandatory to optimize irrigation scheduling and thus maximize yield. Infrared thermography (IRT) can be used as a proxy for detecting stomatal closure as a measure of plant water stress. In this study, an open-source software (Thermal Image Processor (TIPCIP)) that includes image processing techniques such as thermal-visible image segmentation and morphological operations was developed to estimate the crop water stress index (CWSI) in potato crops. Results were compared to the CWSI derived from thermocouples where a high correlation was found ( r P e a r s o n = 0.84). To evaluate the effectiveness of the software, two experiments were implemented. TIPCIP-based canopy temperature was used to estimate CWSI throughout the growing season, in a humid environment. Two treatments with different irrigation timings were established based on CWSI thresholds: 0.4 (T2) and 0.7 (T3), and compared against a control (T1, irrigated when soil moisture...
Agricultural Water Management
Defining biological thresholds associated to plant water status for monitoring water restriction effects: Stomatal conductance and photosynthesis recovery as key indicators in potato
2016 •
Felipe de Mendiburu
Agronomy
Unraveling Ecophysiological Mechanisms in Potatoes under Different Irrigation Methods: A Preliminary Field Evaluation
Roberto Quiroz
Potatoes—a global food security and staple crop—is threatened by dry spells in drought-prone areas. The use of physiological thresholds to save water while maintaining a reasonable tuber yield has been proposed, but their effects on physiological performances and usefulness under different irrigation methods are yet to be evaluated. In this study, photosynthetic traits were monitored to assess the effect of water restriction and rewatering under drip (DI) and furrow (FI) irrigations. The treatments consisted of two maximum light-saturated stomatal conductance (g s _ m a x ) irrigation thresholds (T2: 0.15 and T3: 0.05 mol H 2 O m − 2 s − 1 ) compared with a fully irrigated control (g s _ m a x > 0.3 mol H 2 O m − 2 s − 1 ). DI used less water than FI but promoted early senescence and low percentage of maximum assimilation rate (PMA) at late developmental stages. FI caused no yield penalization in T2 and higher recovery of carbon isotope discrimination and PMA than DI. It is sugge...
Agronomy
Canopy Temperature as a Key Physiological Trait to Improve Yield Prediction under Water Restrictions in Potato
Marcelo Cervantes
Canopy temperature (CT) as a surrogate of stomatal conductance has been highlighted as an essential physiological indicator for optimizing irrigation timing in potatoes. However, assessing how this trait could help improve yield prediction will help develop future decision support tools. In this study, the incorporation of CT minus air temperature (dT) in a simple ecophysiological model was analyzed in three trials between 2017 and 2018, testing three water treatments under drip (DI) and furrow (FI) irrigations. Water treatments consisted of control (irrigated until field capacity) and two-timing irrigation based on physiological thresholds (CT and stomatal conductance). Two model perspectives were implemented based on soil water balance (P1) and using dT as the penalizing factor (P2), affecting the biomass dynamics and radiation use efficiency parameters. One of the trials was used for model calibration and the other two for validation. Statistical indicators of the model performan...
Agronomía Colombiana
Drought stress affects physiological parameters but not tuber yield in three Andean potato (Solanum tuberosum L.) cultivars
Liz Patricia Moreno Fonseca
This study evaluated the effect of water deficit on the physiological response and yield of three Andean potato cultivars. Leaf water potential (Ψw), soil matric potential (SMP), photosynthesis (A), stomatal conductance (gs), transpiration (E), intrinsic water use efficiency (WUEi), leaf temperature (LT), chlorophyll fluorescence parameters, chlorophyll (Chl), carotenoids (Car), electrolyte leakage (EL), growth and yield (Y). Parameters were determined in well-watered (WW) and drought-stressed (DS) plants. The three DS cultivars showed a decrease in leaf from the first day of treatment and reached values close to -2.00 MPa 4 days after treatment (DAT) for the Diacol Capiro (DC) cultivar, 5 DAT for the Pastusa Suprema (PS) cultivar and 6 DAT for the Esmeralda (Es) cultivar. The values of A, gsand E in the DS cultivars decreased from the first DAT. The LT reached the highest values when gs showed the lowest values for the three DS cultivars. WUEi was higher in Es under DS plants but l...
International Journal of Plant Production
Comparing canopy temperature and leaf water potential as irrigation scheduling criteria of potato in water-saving irrigation strategies
2017 •
Seyed Hadi Ahmadi
Irrigation scheduling is important in irrigation water management. In this study, full (FI),deficit (DI) and partial root drying (PRD) irrigation strategies were applied in Agria and Ramospotato cultivars. Canopy temperature (CT) and leaf water potential (LWP) were assessed as thepotential tools for irrigation scheduling during the vegetative and productive growth stages.LWP varied between ca. -1.4 and -1.6 MPa and was not significantly different between FI, DIand PRD irrigation treatments. The LWP and CT values were not significant between the twopotato cultivars during the measurements, but CT was frequently significant between theirrigation treatments such that the PRD treatments were significantly 5 and 2 oC warmer than FIand DI treatments, respectively. Higher CT in PRD caused significant yield penalty such that DIand FI produced almost two times higher fresh tuber yield. Analysis revealed that CT hadsignificantly higher correlation (r=0.66) with water productivity (weight of f...
Communications in Soil Science and Plant Analysis
Assessment of the Crop Water Stress Index and Color Quality of Bur Clover (Medicago polymorpha L.) Under Different Irrigation Regimes
2019 •
Mohammad Pessarakli
Notulae botanicae Horti Agrobotanici Cluj-Napoca
Evaluation of water deficit tolerance in maize genotypes using biochemical, physio-morphological changes and yield traits as multivariate cluster analysis
2022 •
Rujira Tisarum
Frontiers in Agronomy
Impacts of Water Stress Severity and Duration on Potato Photosynthetic Activity and Yields
2020 •
Mandela M. Jacques
