Exploring VIS/NIR reflectance indices for the estimation of water status in highbush blueberry plants grown under full and deficit irrigation

Ribera-Fonseca, Alejandra; Jorquera-Fontena, Emilio; Castro, Manuel; Acevedo, Patricio; Parra, Juan Camilo; Reyes‐Díaz, Marjorie

doi:10.1016/j.scienta.2019.108557

Cited by 15 publications

(12 citation statements)

References 56 publications

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“…In Vaccinum corymbosum , cutting off irrigation late in fruit development reduced yield, leading to smaller, but the firmest, berries produced in comparison with full irrigation [ 17 ]. Similar results in berry quality were reported by Ribera-Fonseca et al [ 18 ], who applied 40% less irrigation water compared to the full irrigation control in pot-grown V. corymbosum plants. Therefore, the effect of DI on fruit quality and yield seems to depend on multiple factors, including the irrigation level, the developmental stage in which water deficit is applied, the species, and/or other experimental conditions.…”

Section: Introductionsupporting

confidence: 87%

Pre-Harvest Salicylic Acid Application Affects Fruit Quality and Yield under Deficit Irrigation in Aristotelia chilensis (Mol.) Plants

González-Villagra,

Bravo,

Reyes-Díaz

et al. 2023

Plants

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Salicylic acid (SA) application is a promising agronomic tool. However, studies under field conditions are required, to confirm the potential benefits of SA. Thus, SA application was evaluated under field conditions for its effect on abscisic acid levels, antioxidant related-parameters, fruit quality, and yield in Aristotelia chilensis subjected to different levels of irrigation. During two growing seasons, three-year-old plants under field conditions were subjected to full irrigation (FI: 100% of reference evapotranspiration (ETo), and deficit irrigation (DI: 60% ETo). During each growth season, a single application of 0.5 mM SA was performed at fruit color change by spraying fruits and leaves of both irrigation treatments. The results showed that DI plants experienced moderate water stress (−1.3 MPa), which increased ABA levels and oxidative stress in the leaves. The SA application facilitated the recovery of all physiological parameters under the DI condition, increasing fruit fresh weight by 44%, with a 27% increase in fruit dry weight, a 1 mm increase in equatorial diameter, a 27% improvement in yield per plant and a 27% increase in total yield, with lesser oxidative stress and tissue ABA levels in leaves. Also, SA application significantly increased (by about 10%) the values of fruit trait variables such as soluble solids, total phenols, and antioxidant activity, with the exceptions of titratable acidity and total anthocyanins, which did not vary. The results demonstrated that SA application might be used as an agronomic strategy to improve fruit yield and quality, representing a saving of 40% regarding water use.

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Section: Introductionsupporting

confidence: 87%

Pre-Harvest Salicylic Acid Application Affects Fruit Quality and Yield under Deficit Irrigation in Aristotelia chilensis (Mol.) Plants

González-Villagra,

Bravo,

Reyes-Díaz

et al. 2023

Plants

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“…These variations are the result of water changes in the leaves, which generate physical and biochemical changes in same, such as changes in the photosynthetic pigments, which makes it less sheet able to absorb electromagnetic radiation in this spectral region and this results in increased reflectance values [19]. Similarly to this research, Ribera-Fonseca et al [20], with individuals of Vaccinium corymbosum to different water situations, obtained distinct spectral signatures [20]. Martins et al submitted individuals of Eucalyptus camaldulensis and Eucalyptus urophylla to water deficit, verified that they present alterations in photosynthesis, respiration, metabolism and absorption of substances [21].…”

Section: Discussionmentioning

confidence: 67%

Spectral Response of Eucalyptus saligna under Water Stress in Southern Brazil

Melo

Santos

Silva

et al. 2019

JEAI

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The present work aims to assess the effect of water stress on the reflectance emitted by leaves of Eucalyptus saligna individuals. The design was completely randomized and the study comprised 30 subjects who underwent 5 cycles of drought simulation, 45 days each. Five individuals were submitted to water deficit treatment and five were used as controls, remaining in adequate water conditions. The experiment and data collection were performed in the external facilities of the forest management laboratory of the Federal University of Santa Maria, Rio Grande do Sul, Brazil. Which it comprised the period from September 2014 to April 2015. Spectral information was collected from 24-month-old tree individuals in adequate water and water stress situations by means of FieldSpec®3 spectroradiometer. Subsequently, the spectral data for the electromagnetic spectrum range from 400 nm to 1700 nm were processed and analyzed. The resulting spectral behavior varied between water stress cycles. In the 450 nm wavelength range, the reflectances ranged from 3.8% to 7.4%, at 550 nm from 7.9% to 14% and at 650 nm from 4.8% to 8.8%. In the near infrared region, in the 900 nm to 1300 nm range, the reflectances ranged from 28% to 62%. The spectral response of E. saligna showed minimal differences when compared to healthy green vegetation, even though it was exposed to water deficit situations. From the information obtained, this research can be used as a parameter for comparative analysis between species belonging to the genus Eucalyptus sp.

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“…This remote sensing technology makes it easy to estimate parameters related to evapotranspiration [8]. Remote sensing can also be used to detect the status of water content in crops by calculating the visible and near-infrared (VIS/NIR) spectral index [9]. Several crop spectrum indices to estimate evapotranspiration include the Normalized Difference Vegetation Index (NDVI), Soil Adjusted Vegetation Index (SAVI), and Enhanced Vegetation Index (EVI).…”

Section: Introductionmentioning

confidence: 99%

Estimation of Single Crop Coefficient and Crop Evapotranspiration Using Remote Sensing for Irrigation Management

Suhardi¹,

Marhaenanto²,

Aji³

2023

Int. J. Adv. Sci. Eng. Inf. Technol.

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Indonesia has rainy and dry seasons sequentially from April to October and October to March. In the dry season, water availability in the soil gradually decreases, especially from June to October, when the peak of drought occurs, causing many agricultural lands to be left uncultivated. However, a small portion of agricultural land can still be planted for crops such as maize and groundnut. However, limited water availability causes crop growth to be disrupted because the amount of water absorbed by crop roots is less than the amount of evapotranspiration water. Therefore, an accurate evapotranspiration estimation technique is needed to make the water supply efficient. This study aims to evaluate the reliability of the technique of estimating crop coefficient (Kc) of maize and groundnut and temperature at the research location. A linear relationship between the Normalized Difference Vegetation Index (NDVI) from sentinel two imagery and Kc-FAO was used to estimate Kc. Meanwhile, a linear relationship between LST from Landsat 8 imagery and the results of interpolating temperature data from 4 climatological stations were used to estimate the temperature at the research site. The results of estimation showed that Kc of maize and groundnut were very accurate with the determinant coefficients (R2) respectively 0.8791 and 0.9352. This is similar to the results of the temperature estimation of the research location, showing a very accurate R2 is 0.9073. The results of this study are expected to be used for future research to improve water crop management.

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Exploring VIS/NIR reflectance indices for the estimation of water status in highbush blueberry plants grown under full and deficit irrigation

Cited by 15 publications

References 56 publications

Pre-Harvest Salicylic Acid Application Affects Fruit Quality and Yield under Deficit Irrigation in Aristotelia chilensis (Mol.) Plants

Pre-Harvest Salicylic Acid Application Affects Fruit Quality and Yield under Deficit Irrigation in Aristotelia chilensis (Mol.) Plants

Spectral Response of Eucalyptus saligna under Water Stress in Southern Brazil

Estimation of Single Crop Coefficient and Crop Evapotranspiration Using Remote Sensing for Irrigation Management

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